TY - JOUR
T1 - Orbital fluctuations in spinel Mn(V 1-xAl x) 2O 4 studied by thermal conductivity measurements
AU - Omura, T.
AU - Ishikawa, T.
AU - Ishitsuka, Y.
AU - Katsufuji, T.
PY - 2012/8/21
Y1 - 2012/8/21
N2 - We measured the thermal conductivity of spinel MnV 2O 4 and Al-doped samples with an applied magnetic field, and they exhibited orbital and spin ordering at low temperatures. We found that the thermal resistivity (reciprocal thermal conductivity) in the orbital-disordered phase is enhanced when the system approaches the critical point of the orbital ordering under the variation of both temperature and magnetic field, but it is suppressed when it crosses the critical point and goes into the orbital-ordered phase. This result indicates that the thermal conductivity of these compounds is dominated by the fluctuation of V t 2g orbitals.
AB - We measured the thermal conductivity of spinel MnV 2O 4 and Al-doped samples with an applied magnetic field, and they exhibited orbital and spin ordering at low temperatures. We found that the thermal resistivity (reciprocal thermal conductivity) in the orbital-disordered phase is enhanced when the system approaches the critical point of the orbital ordering under the variation of both temperature and magnetic field, but it is suppressed when it crosses the critical point and goes into the orbital-ordered phase. This result indicates that the thermal conductivity of these compounds is dominated by the fluctuation of V t 2g orbitals.
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U2 - 10.1103/PhysRevB.86.054436
DO - 10.1103/PhysRevB.86.054436
M3 - Article
AN - SCOPUS:84865253209
SN - 1098-0121
VL - 86
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 5
M1 - 054436
ER -