title: Observation of the large magnetocaloric effect in an orbital-spin-coupled system MnV(2)O(4).
abstract: The magnetocaloric effect (MCE) in an orbital-spin-coupled spinel vanadate MnV(2)O(4) is investigated by magnetization measurement. MnV(2)O(4) has ferrimagnetic ordering occurring at T(C) = 57 K. The maximum magnetic entropy change reaches 14.8 and 24.0 J kg(-1) K(-1) for field changes of 0-2 and 0-4 T, respectively. The maximum adiabatic temperature is about 2.9 K for a magnetic field change of 2 T. Except for the spin entropy change, the observed giant MCE is suggested to be related to the orbital entropy change due to the change of the orbital state of V(3+) induced by an applied magnetic field around T(C).
authors.affiliation: Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China.
authors.forename: X
authors.initials: X
authors.lastname: Luo
authors.forename: Y P
authors.initials: YP
authors.lastname: Sun
authors.forename: L
authors.initials: L
authors.lastname: Hu
authors.forename: B S
authors.initials: BS
authors.lastname: Wang
authors.forename: W J
authors.initials: WJ
authors.lastname: Lu
authors.forename: X B
authors.initials: XB
authors.lastname: Zhu
authors.forename: Z R
authors.initials: ZR
authors.lastname: Yang
authors.forename: W H
authors.initials: WH
authors.lastname: Song