收录:
摘要:
The crystal structure and magnetic transition were studied for the bulk Mn(1.1)Fe(0.9)P(0.8)Ge(0.2) compound prepared by a simple blending and subsequent spark plasma sintering route. X-ray diffraction analysis and refinement show that the compound crystallizes in the hexagonal Fe(2)P-type structure, in which the Mn atoms occupy all the 3g sites and some 3f sites, the Fe atoms occupy the rest of the 3f sites, and P and the Ge atoms randomly occupy the 2c and 1b sites. Magnetic measurement indicates that the Curie temperature T(C) is at 253 K and the thermal hysteresis of M-T curves at T(C) upon heating and cooling, a signature of a first-order magnetic phase transition, is about 15 K. The maximum magnetic entropy change of the compound reaches as high as 49.2 J/kg K in a field change from 0 to 5 T at 253 K, while the adiabatic temperature change of the compound reaches only 1.2 K in a field change from 0 to 1.5 T at the same temperature. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3056157]
关键词:
通讯作者信息:
电子邮件地址:
来源 :
JOURNAL OF APPLIED PHYSICS
ISSN: 0021-8979
年份: 2009
期: 7
卷: 105
3 . 2 0 0
JCR@2022
ESI学科: PHYSICS;
JCR分区:1
中科院分区:1