Magnetic phase diagram, magnetocaloric effect, and exchange bias in Ni43Mn46Sn11-xGax Heusler alloys
Magnetic phase diagram, magnetocaloric effect, and exchange bias in Ni43Mn46Sn11-xGax Heusler alloys
复制标题
Ni43Mn46Sn11-xGax Heusler 合金的磁相图、磁热效应和交换偏压
DOI：
10.1016/j.jmmm.2019.02.001
复制
发表时间：
2019
影响因子：
2.7
通讯作者：
X.F. Jiang
中科院分区：
文献类型：
--
作者：
Y. Li;H.B. Wang;Y. Yao;J.H. Xu;Z.D. Han;Y. Fang;L. Zhang;C.L. Zhang;B. Qian;X.F. Jiang
In this work, the effect of Ga substitution on the crystal structure, phase transitions, magnetocaloric effect, and exchange bias properties, was systematically investigated in Ni 43 Mn 46 Sn 11− x Ga x alloys. With increasing Ga content, the Curie temperature of austenite slightly decreases, while the martensitic transformation temperature shifts to a higher temperature and finally disappears, due to the emergence of γ phase. Large low-field magnetic entropy changes around the martensitic transformation were observed as the transition from a paramagnetic martensitic phase to a ferromagnetic austenitic phase took place. Ni 43 Mn 46 Sn 11 has a reentrant-spin-glass ground state, and Ga doping can enhance the antiferromagnetic interaction arising from lattice contraction, leading to close of intermediate ferromagnetic windows and establishment of canonical spin-glass for x> 2. Prominently, the zero-field-cooled exchange was achieved in the spin-glass region with 5⩽ x⩽ 10.
