Giant Magnetic Entropy Change in Manganese Perovskites near Room Temperature
ZHONG Wei1, CHEN Wei2, WANG Jin-Hui1, DU You-Wei1
1National Laboratory of Solid State Microstructures,
Nanjing University, Nanjing 210093
2Department of Physics, Hebei Normal University, Shijiazhuang 050091
Giant Magnetic Entropy Change in Manganese Perovskites near Room Temperature
ZHONG Wei1;CHEN Wei2;WANG Jin-Hui1;DU You-Wei1
1National Laboratory of Solid State Microstructures,
Nanjing University, Nanjing 210093
2Department of Physics, Hebei Normal University, Shijiazhuang 050091
Abstract： A large magnetic entropy change about twice as high as that of pure gadolinium metal near room temperature has been discovered in manganese perovskites La0.837Ca0.098Na0.038Mn0.987O3.00(8.3 J.kg-1.K-1, at 256K) and La0.822Ca0.096K0.043Mn0.974O3.00 (6.8 J.kg-1.K-1, at 265 K) under a magnetic field of 1.5 T. This phenomenon indicates that manganese perovskites have potential applications for magnetic refrigerants in an extended temperature range even near room temperature.
2001, Vol. 18 
