Author/Authors :
Luo، نويسنده , , X. and Sun، نويسنده , , Y.P. and Wang، نويسنده , , B. and Zhu، نويسنده , , X.B. and Song، نويسنده , , W.H. and Yang، نويسنده , , Z.R. and Dai، نويسنده , , J.M.، نويسنده ,
Abstract :
The magnetocaloric effect and the critical behavior of La2NiMnO6 are investigated by measurement of the magnetization around T C . The magnetic entropy change | Δ S | of La2NiMnO6 for a field change of 0–45 kOe near the Curie temperature is about 5% of the theoretical expectation. The critical behavior of the La2NiMnO6 deviates from the mean field theory. These abnormal phenomena are understood in the context of the strong spin–phonon coupling in La2NiMnO6. It is suggested that a method of modulating this coupling would enhance the magnetic entropy change greatly, which makes the La2NiMnO6 a promising candidate for room-temperature magnetic refrigeration.
