Observation of the large magnetocaloric effect in an orbital-spin-coupled system MnV(2)O(4)

X Luo; Y P Sun; L Hu; B S Wang; W J Lu; X B Zhu; Z R Yang; W H Song

doi:10.1088/0953-8984/21/43/436010

Observation of the large magnetocaloric effect in an orbital-spin-coupled system MnV(2)O(4)

J Phys Condens Matter. 2009 Oct 28;21(43):436010. doi: 10.1088/0953-8984/21/43/436010. Epub 2009 Oct 8.

Authors

X Luo¹, Y P Sun, L Hu, B S Wang, W J Lu, X B Zhu, Z R Yang, W H Song

Affiliation

¹ Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China.

PMID: 21832456
DOI: 10.1088/0953-8984/21/43/436010

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).