Mn1.2Fe0.8P0.74Ge0.26-xSex化合物磁热性能研究*

王少博, 刘丹敏, 肖卫强, 张振路, 岳明, 张久兴

RESEARCH OF THE MAGNETOCALORIC PROPER- TIES IN Mn1.2Fe0.8P0.74Ge0.26-xSex COMPOUNDS

WANG Shaobo, LIU Danmin, XIAO Weiqiang, ZHANG Zhenlu, YUE Ming, ZHANG Jiuxing

表1 Mn1.2Fe0.8P0.74Ge0.26-xSex化合物在333 K的晶格常数和磁热性能

Table 1 Lattice parameters a and c at 333 K and the magnetocaloric properties of the Mn1.2Fe0.8P0.74Ge0.26-xSex compounds

x a / nm c / nm c/a Tc / K ?Thys / K ?Tcoex / K ?SDSC / (J·kg-1·K-1) 0 0.61088 0.34534 0.56531 280.2 2.7 8.5 24.1 0.005 0.61081 0.34527 0.56526 279.4 2.6 9.7 22.7 0.01 0.61123 0.34512 0.56464 285.8 3.2 7.6 24.4 0.015 0.61121 0.34504 0.56452 285.8 2.8 9.6 22.4 0.02 0.61132 0.34496 0.56429 285.8 3.0 12.1 23.1 0.03 0.61080 0.34503 0.56488 282.8 3.2 11.6 21.7