Magnetic ordering and spin excitations in Mn(dca)2(pyz) [dca = N (CN)2-, pyz = pyrazine]
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Magnetic ordering and spin excitations in Mn(dca)2(pyz) [dca = N (CN)2-, pyz = pyrazine]. / Manson, J. L.; Bordallo, H. N.; Lynn, J. W.; Huang, Q.; Feyerherm, R.; Loose, A.; Chapon, L.; Argyriou, D. N.
In: Applied Physics A, Vol. 74, No. SUPPL.I, 01.12.2002, p. 722-724.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Magnetic ordering and spin excitations in Mn(dca)2(pyz) [dca = N (CN)2-, pyz = pyrazine]
AU - Manson, J. L.
AU - Bordallo, H. N.
AU - Lynn, J. W.
AU - Huang, Q.
AU - Feyerherm, R.
AU - Loose, A.
AU - Chapon, L.
AU - Argyriou, D. N.
PY - 2002/12/1
Y1 - 2002/12/1
N2 - We have studied the T- and H-dependent magnetism in Mn(dca)2(pyz) [dca = N(CN)2-, pyz = pyrazine] using neutron-scattering methods. The crystal structure can be viewed as a molecular analog of ReO3, where 1D Mn-pyz-Mn chains connect 2D Mn(dca)2 square sheets to form a 3D network. In zero field, the Mn2+ moments order antiferromagnetically below 2.53(2) K along the ac diagonal with a magnitude of 4.15(6)μB at 1.35 K. The field-dependent response of the [111] magnetic reflection is consistent with spin-flop and induced ferromagnetic phase transitions as previously observed in magnetization measurements. Diffuse-scattering studies indicated no evidence for low-dimensional spin correlations. Using quasielastic neutron scattering, a low-energy spin-wave excitation was observed at ∼0.23 meV, which is ∼1/6 the momentum transfer observed in Mn(dca)2 owing to a reduced number of magnetic nearest neighbors.
AB - We have studied the T- and H-dependent magnetism in Mn(dca)2(pyz) [dca = N(CN)2-, pyz = pyrazine] using neutron-scattering methods. The crystal structure can be viewed as a molecular analog of ReO3, where 1D Mn-pyz-Mn chains connect 2D Mn(dca)2 square sheets to form a 3D network. In zero field, the Mn2+ moments order antiferromagnetically below 2.53(2) K along the ac diagonal with a magnitude of 4.15(6)μB at 1.35 K. The field-dependent response of the [111] magnetic reflection is consistent with spin-flop and induced ferromagnetic phase transitions as previously observed in magnetization measurements. Diffuse-scattering studies indicated no evidence for low-dimensional spin correlations. Using quasielastic neutron scattering, a low-energy spin-wave excitation was observed at ∼0.23 meV, which is ∼1/6 the momentum transfer observed in Mn(dca)2 owing to a reduced number of magnetic nearest neighbors.
UR - http://www.scopus.com/inward/record.url?scp=0347297381&partnerID=8YFLogxK
U2 - 10.1007/s003390201662
DO - 10.1007/s003390201662
M3 - Journal article
AN - SCOPUS:0347297381
VL - 74
SP - 722
EP - 724
JO - Applied Physics A: Materials Science & Processing
JF - Applied Physics A: Materials Science & Processing
SN - 0947-8396
IS - SUPPL.I
ER -
ID: 203940247