TY - JOUR
T1 - Dynamic spin correlations in the frustrated cubic phase of MnV 2O4
AU - Chung, Jae Ho
AU - Song, Young Sang
AU - Kim, J. H.
AU - Suzuki, T.
AU - Katsufuji, T.
AU - Matsuda, M.
AU - Lee, S. H.
PY - 2013/9/23
Y1 - 2013/9/23
N2 - The ferrimagnetic spinel MnV2O4 undergoes an orbital-induced cubic-to-tetragonal distortion at TYK=58 K, below which noncollinear commensurate ferrimagnetic ordering occurs. Using inelastic neutron scattering, we investigated low-energy dynamics in its cubic phase above TYK. We observed two types of coexisting short-range magnetic excitations: the dispersive spin waves centered around the Brillouin-zone centers, k0 = (0, 0, 0), and quasielastic spin fluctuations centered at incommensurate wave vectors, kincom = (ξ, ξ, 0). The coexistence of the two distinct features can be understood as a dynamic realization of the conical spiral order observed in cubic spinels such as CoCr2O4.
AB - The ferrimagnetic spinel MnV2O4 undergoes an orbital-induced cubic-to-tetragonal distortion at TYK=58 K, below which noncollinear commensurate ferrimagnetic ordering occurs. Using inelastic neutron scattering, we investigated low-energy dynamics in its cubic phase above TYK. We observed two types of coexisting short-range magnetic excitations: the dispersive spin waves centered around the Brillouin-zone centers, k0 = (0, 0, 0), and quasielastic spin fluctuations centered at incommensurate wave vectors, kincom = (ξ, ξ, 0). The coexistence of the two distinct features can be understood as a dynamic realization of the conical spiral order observed in cubic spinels such as CoCr2O4.
UR - http://www.scopus.com/inward/record.url?scp=84884843263&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.88.094430
DO - 10.1103/PhysRevB.88.094430
M3 - Article
AN - SCOPUS:84884843263
SN - 1098-0121
VL - 88
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 9
M1 - 094430
ER -