TY - JOUR
T1 - Evolution of magnetic and structural transitions and enhancement of magnetocaloric effect in Fe1-xMnx V2 O4
AU - Choudhury, D.
AU - Suzuki, T.
AU - Okuyama, D.
AU - Morikawa, D.
AU - Kato, K.
AU - Takata, M.
AU - Kobayashi, K.
AU - Kumai, R.
AU - Nakao, H.
AU - Murakami, Y.
AU - Bremholm, M.
AU - Iversen, B. B.
AU - Arima, T.
AU - Tokura, Y.
AU - Taguchi, Y.
PY - 2014/3/31
Y1 - 2014/3/31
N2 - Magnetic, structural, and magnetocaloric properties have been investigated for a solid-solution system, Fe1-xMnxV2O4 (0.0≤x≤1.0) with a spinel structure. As orbital-active Fe2+ ions are partially substituted with orbital-inactive Mn2+ ions, various interactions, such as the Jahn-Teller interaction, spin-orbit coupling, and the exchange interaction, compete with each other, giving rise to a rich magnetic and structural phase diagram. The magnetocaloric effect exhibits two peaks as a function of temperature for x≤0.9, associated with a higher-temperature ferrimagnetic transition, and with a lower-temperature concomitant spin-canting and orbital-ordering (mostly lattice-structural) transition of the V site. The large magnetocaloric effect as observed in MnV2O4 can thus be attributed to the sum of the entropy changes upon the merged phase transition at TN1∼TN2.
AB - Magnetic, structural, and magnetocaloric properties have been investigated for a solid-solution system, Fe1-xMnxV2O4 (0.0≤x≤1.0) with a spinel structure. As orbital-active Fe2+ ions are partially substituted with orbital-inactive Mn2+ ions, various interactions, such as the Jahn-Teller interaction, spin-orbit coupling, and the exchange interaction, compete with each other, giving rise to a rich magnetic and structural phase diagram. The magnetocaloric effect exhibits two peaks as a function of temperature for x≤0.9, associated with a higher-temperature ferrimagnetic transition, and with a lower-temperature concomitant spin-canting and orbital-ordering (mostly lattice-structural) transition of the V site. The large magnetocaloric effect as observed in MnV2O4 can thus be attributed to the sum of the entropy changes upon the merged phase transition at TN1∼TN2.
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U2 - 10.1103/PhysRevB.89.104427
DO - 10.1103/PhysRevB.89.104427
M3 - Article
AN - SCOPUS:84898749994
SN - 0163-1829
VL - 89
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 10
M1 - 104427
ER -