Magnetic ground state of the ordered double-perovskite Sr2YbRuO6: Two magnetic transitions
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Magnetic ground state of the ordered double-perovskite Sr2YbRuO6 : Two magnetic transitions. / Sharma, Shivani; Adroja, D. T.; Ritter, C.; Khalyavin, D.; Manuel, P.; Stenning, Gavin B. G.; Sundaresan, A.; Hillier, A. D.; Deen, P. P.; Khomskii, D.; Langridge, S.
I: Physical Review B, Bind 102, Nr. 13, 134412, 09.10.2020.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Magnetic ground state of the ordered double-perovskite Sr2YbRuO6
T2 - Two magnetic transitions
AU - Sharma, Shivani
AU - Adroja, D. T.
AU - Ritter, C.
AU - Khalyavin, D.
AU - Manuel, P.
AU - Stenning, Gavin B. G.
AU - Sundaresan, A.
AU - Hillier, A. D.
AU - Deen, P. P.
AU - Khomskii, D.
AU - Langridge, S.
PY - 2020/10/9
Y1 - 2020/10/9
N2 - Comprehensive muon-spin-rotation/relaxation (mu SR) and neutron powder-diffraction (NPD) studies supported via bulk measurements have been performed on the ordered double-perovskite Sr2YbRuO6 to investigate the nature of the magnetic ground state. Two sharp transitions at T-N1 similar to 42 K and T-N2 similar to 36 K have been observed in the static and dynamic magnetization measurements, coinciding with the heat-capacity data. In order to confirm the origin of the observed phase transitions and the magnetic ground state, microscopic evidences are presented here. An initial indication of long-range magnetic ordering comes from a sharp drop in the muon initial asymmetry and a peak in the relaxation rate near T-N1. NPD confirms that the magnetic ground state of Sr2YbRuO6 consists of an antiferromagnetic (AFM) structure with interpenetrating lattices of parallel Yb3+ and Ru5+ moments lying in the ab plane and adopting an A-type AFM structure. Intriguingly, a small but remarkable change is observed in the long-range ordering parameters at T-N2 confirming the presence of a weak spin reorientation (i.e., change in spin configuration) transition of Ru and Yb moments, as well as a change in the magnetic moment evolution of the Yb3+ spins at T-N2. The temperature-dependent behavior of the Yb3+ and Ru5+ moments suggests that the 4d electrons of Ru5+ play a dominating role in stabilizing the long-range-ordered magnetic ground state in the double-perovskite Sr2YbRuO6 whereas only the Yb3+ moments show an arrest at T-N2. The observed magnetic structure and the presence of a ferromagnetic interaction between Ru and Yb ions are explained with use of the Goodenough-Kanamori-Anderson rules. Possible reasons for the presence of the second magnetic phase transition and of a compensation point in the magnetization data are linked to competing mechanisms of magnetic anisotropy.
AB - Comprehensive muon-spin-rotation/relaxation (mu SR) and neutron powder-diffraction (NPD) studies supported via bulk measurements have been performed on the ordered double-perovskite Sr2YbRuO6 to investigate the nature of the magnetic ground state. Two sharp transitions at T-N1 similar to 42 K and T-N2 similar to 36 K have been observed in the static and dynamic magnetization measurements, coinciding with the heat-capacity data. In order to confirm the origin of the observed phase transitions and the magnetic ground state, microscopic evidences are presented here. An initial indication of long-range magnetic ordering comes from a sharp drop in the muon initial asymmetry and a peak in the relaxation rate near T-N1. NPD confirms that the magnetic ground state of Sr2YbRuO6 consists of an antiferromagnetic (AFM) structure with interpenetrating lattices of parallel Yb3+ and Ru5+ moments lying in the ab plane and adopting an A-type AFM structure. Intriguingly, a small but remarkable change is observed in the long-range ordering parameters at T-N2 confirming the presence of a weak spin reorientation (i.e., change in spin configuration) transition of Ru and Yb moments, as well as a change in the magnetic moment evolution of the Yb3+ spins at T-N2. The temperature-dependent behavior of the Yb3+ and Ru5+ moments suggests that the 4d electrons of Ru5+ play a dominating role in stabilizing the long-range-ordered magnetic ground state in the double-perovskite Sr2YbRuO6 whereas only the Yb3+ moments show an arrest at T-N2. The observed magnetic structure and the presence of a ferromagnetic interaction between Ru and Yb ions are explained with use of the Goodenough-Kanamori-Anderson rules. Possible reasons for the presence of the second magnetic phase transition and of a compensation point in the magnetization data are linked to competing mechanisms of magnetic anisotropy.
KW - NEUTRON-DIFFRACTION
KW - CRYSTAL-STRUCTURES
KW - SR(2)LNRUO(6) LN
KW - SR
KW - BA
KW - EU
U2 - 10.1103/PhysRevB.102.134412
DO - 10.1103/PhysRevB.102.134412
M3 - Journal article
VL - 102
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 13
M1 - 134412
ER -
ID: 271542848