Kim Lefmann
Professor
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Nature of the magnetic stripes in fully oxygenated La2CuO4+y
Ţuţueanu, A., Jacobsen, Henrik, Jensen Ray, P., fvh927, fvh927, Lăcătuşu, M., Tejsner, T. B., Grivel, J., Schmidt, W., Toft-petersen, R., Steffens, P., Boehm, M., Wells, B., Udby, L., Lefmann, Kim & Rømer, A. T., 2021, In: Physical Review B. 103, 4, 15 p., 045138.Research output: Contribution to journal › Journal article › Research › peer-review
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Gradual emergence of superconductivity in underdoped La2-xSrxCuO4
Ţuţueanu, A., Kamminga, M. E., Tejsner, T. B., Jacobsen, Henrik, Hansen, H. W., Lăcătuşu, M., Baas, J., Eliasen, K. L., Grivel, J., Sassa, Y., Christensen, N. B., Steffens, P., Boehm, M., Piovano, A., Lefmann, Kim & Rømer, A. T., 2023, In: Physical Review B. 107, 17, 6 p., 174514.Research output: Contribution to journal › Journal article › Research › peer-review
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Non-destructive characterisation of dopant spatial distribution in cuprate superconductors
Ţuţueanu, A., Sales, M., Eliasen, K. L., Lǎcǎtuşu, M., Grivel, J., Kardjilov, N., Manke, I., Krzyzagorski, M., Sassa, Y., Andersson, M. S., Schmidt, S. & Lefmann, Kim, 1 Aug 2020, In: Physica C: Superconductivity and its Applications. 575, 6 p., 1353691.Research output: Contribution to journal › Journal article › Research › peer-review
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Field-induced electronic phase separation in the high-temperature superconductor La1.94Sr0.06CuO4+y
fvh927, fvh927, Larsen, J., Jacobsen, Henrik, Rømer, A. T., Tutueanu, A., Ahmad, M., Grivel, J., Scheuermann, R., Zimmermann, M. V., Boehm, M., Steffens, P., Niedermayer, C., Pedersen, K. S., Christensen, N. B., Wells, B. O., Lefmann, Kim & Udby, L., 13 May 2024, In: Physical Review B. 109, 17, 13 p., 174517.Research output: Contribution to journal › Journal article › Research › peer-review
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McStas: Past, present and future
Willendrup, P. K., Farhi, E., Knudsen, E., Filges, U. & Lefmann, Kim, 19 Feb 2014, In: Journal of Neutron Research. 17, 1, p. 35-43Research output: Contribution to journal › Journal article › Research › peer-review
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McStas (ii): An overview of components, their use, and advice for user contributions
Willendrup, P. K. & Lefmann, Kim, 23 Apr 2021, In: Journal of Neutron Research. 23, 1, p. 7-27 21 p.Research output: Contribution to journal › Journal article › Research › peer-review
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McStas (i): Introduction, use, and basic principles for ray-tracing simulations
Willendrup, P. K. & Lefmann, Kim, 2 Apr 2020, In: Journal of Neutron Research. 22, 1, p. 1-16 16 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Using McStas for modelling complex optics, using simple building bricks
Willendrup, P. K., Udby, L., Knudsen, E., Farhi, E. & Lefmann, Kim, 1 Apr 2011, In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 634, Sp.1, p. S150-S155Research output: Contribution to journal › Conference article › Research › peer-review
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New developments in the McStas neutron instrument simulation package
Willendrup, P. K., Knudsen, E. B., Klinkby, E. B., Nielsen, T. N., Farhi, E., Filges, U. & Lefmann, Kim, 1 Aug 2014, In: Journal of Physics: Conference Series (Online). 528, 1, 012035.Research output: Contribution to journal › Journal article › Research › peer-review
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A Monte Carlo Simulation of Neutron Instrument Resolution Functions: Proceedings of 10th International Conference on Quasielastic Neutron Scattering and 5th Workshop on Inelastic Neutron Spectrometers
Vickery, A., Udby, L., Violini, N., Voigt, J., Deen, P. P. & Lefmann, Kim, 12 Nov 2013, In: Journal of the Physical Society of Japan. 82, Supplement A , 9 p., SA037.Research output: Contribution to journal › Conference article › Research › peer-review
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Magnetic ordering in electronically phase-separated La(2-x)Sr(x)CuO(4+y): Neutron diffraction experiments
Udby, L., Andersen, N. H., Chou, F. C., Christensen, N. B., Emery, S. B., Lefmann, Kim, Lynn, J. W., Mohottala, H. E., Niedermayer, C. & Wells, B. O., 2009, In: Physical Review B Condensed Matter. 80, p. 014505 5 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Measurement of unique magnetic and superconducting phases in oxygen-doped high-temperature superconductors La2-xSrxCuO4+y
Udby, L., Larsen, J., Christensen, N. B., Boehm, M., Niedermayer, C., Mohottala, H. E., Jensen, T. B. S., Toft-Petersen, R., Chou, F. C., Andersen, N. H., Lefmann, Kim & Wells, B. O., 25 Nov 2013, In: Physical Review Letters. 111, 22, 5 p., 227001.Research output: Contribution to journal › Journal article › Research › peer-review
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Analysing neutron scattering data using McStas virtual experiments
Udby, L., Willendrup, P. K., Knudsen, E., Niedermayer, C., Filges, U., Christensen, N. B., Farhi, E., Wells, B. O. & Lefmann, Kim, 1 Apr 2011, In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 634, Suppl. 1, p. S138-S143Research output: Contribution to journal › Conference article › Research › peer-review
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E-learning neutron scattering
Udby, L., Ray, P. J., Lefmann, Kim, Bruun, J., Willendrup, P. K., Nielsen, J. S. B., Schober, H., Neuhaus, J. & Pulz, J., 1 Feb 2013, In: Neutron News. 24, 1, p. 18-23 6 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Magnetic ordering in electronically phase-separated La2-x Srx CuO4+y: Neutron diffraction experiments
Udby, L., Chou, F. C., Christensen, N. B., Emery, S. B., Lefmann, Kim, Lynn, J. W., Mohottala, H. E., Niedermayer, C. & Wells, B. O., 6 Aug 2009, In: Physical Review B - Condensed Matter and Materials Physics. 80, 1, 014505.Research output: Contribution to journal › Journal article › Research › peer-review
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Multiple scattering camouflaged as magnetic stripes in single crystals of superconducting (La,Sr)2CuO4
Tutueanu, A. E., Tejsner, T. B., Lacatusu, M. E., Hansen, H. W., Eliasen, K. L., Bohm, M., Steffens, P., Niedermayer, C. & Lefmann, Kim, 2020, In: Journal of Neutron Research. 22, 1, p. 49-56Research output: Contribution to journal › Journal article › Research › peer-review
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Double-Spin-Flip Resonance of Rhodium Nuclei at Positive and Negative Spin Temperatures
Tuoriniemi, J. T., Nummila, K. K., Lefmann, Kim, Knuuttila, T. A., Yao, W. & Rasmussen, Finn Berg, 10 Jan 2000, In: Physical Review Letters. 84, p. 370-373Research output: Contribution to journal › Journal article › Research › peer-review
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Neutron Experiments on Antiferromagnetic Nuclear Order in Silver at Picokelvin Temperatures
Tuoriniemi, J. T., Nummila, K., Vuorinen, R. T., Lounasmaa, O. V., Metz, A., Siemensmayer, K., Steiner, M., Clausen, K. N., Lefmann, Kim & Rasmussen, Finn Berg, 30 Jun 1995, In: Physical Review Letters. 75, p. 3744-3747Research output: Contribution to journal › Journal article › Research
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Reduction of data from inverted-geometry time-of-flight instruments
Tregenna-Piggott, P. L. W., Juryani, F., Christiansen, P., Willendrup, P. & Lefmann, Kim, 2008, In: Journal of Neutron Research. 16, 1&2, p. 13-22 9 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Anomalous magnetic structure and spin dynamics in magnetoelectric LiFePO4
Toft-Petersen, R., Reehuis, M., Jensen, T. B. S., Andersen, N. H., Li, J., Le, M. D., Laver, M., Niedermayer, C., Klemke, B., Lefmann, Kim & Vaknin, D., 2015, In: Physical Review B. 92, 2, 9 p., 024404.Research output: Contribution to journal › Journal article › Research › peer-review
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High-field magnetic phase transitions and spin excitations in magnetoelectric LiNiPO4
Toft-Petersen, R., Jensen, Jens, Jensen, T. B. S., Andersen, N. H., Christensen, N. B., Niedermayer, C., Kenzelmann, M., Skoulatos, M., Le, M. D., Lefmann, Kim, Hansen, S. R., Li, J., Zarestky, J. L. & Vaknin, D., 2 Aug 2011, In: Physical Review B Condensed Matter. 84, 5, p. 054408 10 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Neutron diffraction study of anomalous high-field magnetic phases in TmNi2B2C
Toft, K. N., Abrahamsen, A. B., Eskildsen, M. R., Lefmann, Kim, Andersen, N. H., Vorderwisch, P., Smeibidl, P., Meissner, M. & Canfield, P. C., 15 Jun 2004, In: Physical Review B. 69, 214507.Research output: Contribution to journal › Journal article › Research › peer-review
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Prediction of beam hardening artefacts in computed tomography using Monte Carlo simulations
Thomsen, M., Knudsen, E. B., Willendrup, P. K., Bech, M., Willner, M., Pfeiffer, F., Poulsen, M., Lefmann, Kim & Feidenhans'l, Robert Krarup, 2015, In: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 342, p. 314-320 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Dynamics in γ-Fe2O3 nanoparticles studied by time-of-flight polarized neutron scattering
Theil Kuhn, L., Lefmann, Kim, Klausen, S. N., Rønnow, H. M., Murani, A. & Srewart, R., 3 Sep 2004, In: Physica B: Condensed Matter. 350, p. e217-e219Research output: Contribution to journal › Conference article › Research › peer-review
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Chemical tunnel-splitting-engineering in a dysprosium-based molecular nanomagnet
Sørensen, M. A., Hansen, U. B., Perfetti, M., Pedersen, K. S., Bartolome, E., Simeoni, G. G., Mutka, H., Rols, S., Jeong, M., Zivkovic, I., Retuerto Millan, M., Arauzo, A., Bartolome, J., Piligkos, Stergios, Weihe, Høgni, Doerrer, L. H., van Slageren, J., Rønnow, H. M., Lefmann, Kim & Bendix, Jesper, 1 Dec 2018, In: Nature Communications. 9, 9 p., 1292.Research output: Contribution to journal › Journal article › Research › peer-review
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Neutron diffraction determination of the nuclear spin ordering in Cu and Ag at nano- and subnano-K temperatures
Steiner, M., Metz, A., Siemensmeyer, K., Lounasmaa, O. V., Tuoriniemi, J. T., Nummila, K. K., Vuorinen, R. T., Clausen, K. N., Lefmann, Kim & Rasmussen, Finn Berg, 1 Apr 1996, In: Journal of Applied Physics. 79, 8, p. 5078-5080 3 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Nuclear order in silver at pico-Kelvin temperature
Siemensmeyer, K., Clausen, Kristine Bülow, Lefmann, Kim, Lounasmaa, O. V., Metz, A., Nummila, K. K., Steiner, M., Tuoriniemi, J. T., Vuorinen, R. T. & Rasmussen, Finn Berg, 2 Jun 1997, In: Physica B: Condensed Matter. 234-236, p. 768-769 2 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Tailored instrumentation for long-pulse neutron spallation sources
Schober, H., Farhi, E., Mezei, F., Andersen, K., Bentley, P. M., Christiansen, P. & Lefmann, Kim, 2008, In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 589, 1, p. 34-46 12 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Emergent magnetic behavior in the frustrated Yb3Ga5O12 garnet
Sandberg, L. O., Edberg, R., Bakke, I. B., Pedersen, K. S., Hatnean, M. C., Balakrishnan, G., Mangin-Thro, L., Wildes, A., Fak, B., Ehlers, G., Sala, G., Henelius, P., Lefmann, Kim & Deen, P. P., 13 Aug 2021, In: Physical Review B. 104, 6, 16 p., 064425.Research output: Contribution to journal › Journal article › Research › peer-review
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Design, calibration, and performance of a uniaxial pressure cell for neutron scattering studies of quantum magnetism
Sandberg, L. Ø., Haubro, M. L., Krighaar, Kristine Marie Løfgren, Edberg, R., Fjellvåg, I. M. B., Guthrie, M., Holmes, A. T., Mangin-thro, L., Wildes, A., Henelius, P., Lefmann, Kim & Deen, P. P., 3 Oct 2023, In: Review of Scientific Instruments. 94, 10, 17 p., 103901.Research output: Contribution to journal › Journal article › Research › peer-review
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Powder diffractometers at long-pulsed sources: Proceedings of the International Workshop on Neutron Applications on Strongly Correlated Electron Systems 2011 (NASCES11)
Sales, M., fvh927, fvh927, Lieutenant, K. & Lefmann, Kim, 20 Dec 2011, In: Journal of the Physical Society of Japan. 80, Suppl.B, p. SB018 4 p.Research output: Contribution to journal › Conference article › Research › peer-review
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Spin Dynamics of the 2D Spin ½ Quantum Antiferromagnet Copper Deuteroformate Tetradeuterate (CFTD)
Rønnow, H. M., McMorrow, D. F., Goldea, R., Harrison, A., Youngson, I. D., Perring, T. G., Aeppli, G., Syljuåsen, O. F., Lefmann, Kim & Rischel, C., 28 Jun 2001, In: Physical Review Letters. 87, 037202.Research output: Contribution to journal › Journal article › Research › peer-review
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Comment on "Spin Dynamics of the 2D Spin Quantum Antiferromagnet Copper Deuteroformate Tetradeuterate (CFTD)"
Rønnow, H. M., McMorrow, D. F., Coldea, R., Harrison, A., Youngson, I. D., Perring, T. G., Aeppli, G., Syljuåsen, O. F., Lefmann, Kim & Rischel, C., 30 Jun 2002, In: Physical Review Letters. 89, 079702.Research output: Contribution to journal › Journal article › Research › peer-review
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Field-induced interplanar magnetic correlations in the high-temperature superconductor La1.88Sr0.12CuO4
Rømer, A. T., Ray, P. J., Jacobsen, Henrik, Udby, L., Andersen, Brian Møller, Bertelsen, M., fvh927, fvh927, Christensen, N. B., Toft-Petersen, R., Skoulatos, M., Laver, M., Schneidewind, A., Link, P., Oda, M., Ido, M., Nomono, N. & Lefmann, Kim, 11 May 2015, In: Physical Review B. 91, 174507.Research output: Contribution to journal › Journal article › Research › peer-review
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Glassy low-energy spin fluctuations and anisotropy gap in La1.88Sr0.12CuO4
Rømer, A. T., Chang, J., Andersen, Brian Møller, Lefmann, Kim, Christensen, N. B., Mähler, L., Gavilano, J., Gilardi, R., Niedermayer, C., Rønnow, H. M., Schniedewind, A., Link, P., Oda, M., Ido, M., Momono, N. & Mesot, J., 22 Apr 2013, In: Physical Review B. 87, 14, p. 144513Research output: Contribution to journal › Journal article › Research › peer-review
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Staging superstructures in high-Tc Sr/O codoped La2-xSrxCuO4+y
Ray, P. J., Andersen, N. H., Jensen, T. B. S., Mohottala, H. E., Niedermayer, C., Lefmann, Kim, v.Zimmermann, M. & Udby, L., 9 Nov 2017, In: Physical Review B. 96, 6 p., 174106.Research output: Contribution to journal › Journal article › Research › peer-review
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Optimizing a neutron-beam focusing device for the direct geometry time-of-flight spectrometer TOFTOF at the FRM II reactor source
Rasmussen, N. G., Simeoni, G. G. & Lefmann, Kim, 2016, In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 816, p. 106-112 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
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A Monte Carlo approach for simulating the propagation of partially coherent x-ray beams
Prodi, A., Feidenhans'l, Robert Krarup, Lefmann, Kim, Knudsen, E., Willendrup, P. K., Schmitt, S. & Ferrero, C., 23 Sep 2011, In: Proceedings of SPIE. 8141, p. 814108Research output: Contribution to journal › Conference article › Research › peer-review
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Magnetic Anisotropy Switch: Easy Axis to Easy Plane Conversion and Vice Versa
Perfetti, M., Sørensen, M. A., Hansen, U. B., Bamberger, H., Lenz, S., Hallmen, P. P., Fennell, T., Simeoni, G. G., Arauzo, A., Bartolome, J., Bartolome, E., Lefmann, Kim, Weihe, Høgni, van Slageren, J. & Bendix, Jesper, 2018, In: Advanced Functional Materials. 28, 32, 8 p., 1801846.Research output: Contribution to journal › Journal article › Research › peer-review
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Optimizing neutron guides: CoatingWriter
Olsen, M. A., Bertelsen, M. & Lefmann, Kim, 12 Dec 2018, In: Journal of Neutron Research. 20, 4, p. 137-139Research output: Contribution to journal › Journal article › Research › peer-review
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Foton - et fysikspil
Oddershede, L. B., Jacobsen, R. H., Lefmann, Kim & Thoft, N. B., 1 Mar 1994, In: Kvant. 4, p. 9-18Research output: Contribution to journal › Journal article › Communication
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Neutron experiments on nuclear order in silver at pK temperatures
Nummila, K. K., Tuoriniemi, J. T., Vuorinen, R. T., Lounasmaa, O. V., Lefmann, Kim, Clausen, Kristine Bülow, Metz, A., Siemensmeyer, K., Lipinski, L., Steiner, M. & Rasmussen, Finn Berg, 1 Jan 1996, In: Czechoslovak Journal of Physics. 46, SUPPL. 4, p. 2201-2202 2 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Multiple unconventional charge density wave transitions in LaPt2Si2 superconductor clarified with high-energy X-ray diffraction
Nocerino, E., Sanlorenzo, I., Papadopoulos, K., Medarde, M., Lyu, J., Klein, Y. M., Minelli, A., Hossain, Z., Thamizhavel, A., Lefmann, Kim, Ivashko, O., Von Zimmermann, M., Sassa, Y. & Månsson, M., 30 Sep 2023, In: Communications Materials. 4, 1, 12 p., 77.Research output: Contribution to journal › Journal article › Research › peer-review
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Q-dependent electron-phonon coupling induced phonon softening and non-conventional critical behavior in the CDW superconductor LaPt2Si2
Nocerino, E., Stuhr, U., San Lorenzo, I., Mazza, F., Mazzone, D. G., Hellsvik, J., Hasegawa, S., Asai, S., Masuda, T., Itoh, S., Minelli, A., Hossain, Z., Thamizhavel, A., Lefmann, Kim, Sassa, Y. & Månsson, M., 2023, In: Journal of Science: Advanced Materials and Devices. 8, 4, 10 p., 100621.Research output: Contribution to journal › Journal article › Research › peer-review
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Magnetic propertie of nanoparticales of antiferromagnetic materials
Mørup, S., Frandsen, C., Bødker, F., Klausen, S. N., Lefmann, Kim, Lindgård, P. & Hansen, M. F., 12 Jan 2002, In: Hyperfine Interactions. 144-145, 1-4, p. 347-357Research output: Contribution to journal › Journal article › Research › peer-review
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Prototype of the novel CAMEA concept—A backend for neutron spectrometers
Marko, M., Groitl, F., Lass, J., Birk, J. O., Freeman, P., Lefmann, Kim, Christensen, N. B., Niedermayer, C., Juranyi, F., Lass, J., Hansen, A. & Rønnow, H. M., Jan 2018, In: Review of Scientific Instruments. 89, 1, 13 p., 015105.Research output: Contribution to journal › Journal article › Research › peer-review
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Neutron guide shielding for the BIFROST spectrometer at ESS
Mantulnikovs, K., Bertelsen, M., Cooper-jensen, C. P., Lefmann, Kim & Klinkby, E. B., 1 Sep 2016, In: Journal of Physics - Conference Series. 746, 1, 012027.Research output: Contribution to journal › Conference article › Research › peer-review
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Coherent Epitaxial Semiconductor-Ferromagnetic Insulator InAs/EuS Interfaces: Band Alignment and Magnetic Structure
Liu, Yu, Luchini, A., Marti-Sanchez, S., Koch, C., Schuwalow, S., Khan, S. A., Stankevic, T., Francoual, S., Mardegan, J. R. L., Krieger, J. A., Strocov, V. N., Stahn, J., Vaz, C. A. F., Ramakrishnan, M., Staub, U., Lefmann, Kim, Aeppli, G., Arbiol, J. & Krogstrup, Peter, 19 Feb 2020, In: A C S Applied Materials and Interfaces. 12, 7, p. 8780-8787 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Special Issue: Workshop on the Monte Carlo Simulation of Neutron Scattering Instruments MCNSI7
Lefmann, Kim & Šaroun, J., 1 Jan 2014, In: Journal of Neutron Research. 17, 1, p. 3-3Research output: Contribution to journal › Journal article › Research › peer-review
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Status of the danish Neutron Scattering Society
Lefmann, Kim, 1 Mar 2011Research output: Other contribution › Communication
ID: 3673604
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Solitonic lattice and Yukawa forces in the rare-earth orthoferrite TbFeO3
Research output: Contribution to journal › Journal article › Research › peer-review
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50 Years of Swiss Neutron Diffraction Instrumentation
Research output: Contribution to journal › Journal article › Research
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Long-Pulse Neutron Instrumentation Workshop, August 26-28, 2009
Research output: Other contribution › Research
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