Open AccessTuning antiferromagnetic exchange interaction for spontaneous exchange bias in MnNiSnSi system
Author(s) -
Liyun Jia,
Jianlei Shen,
Mengmeng Li,
Xi Wang,
Li Ma,
Congmian Zhen,
Denglu Hou,
Enke Liu,
Wenhong Wang,
Guangheng Wu
Publication year - 2017
Publication title -
apl materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.571
H-Index - 60
ISSN - 2166-532X
DOI - 10.1063/1.5001793
Subject(s) - antiferromagnetism , ferromagnetism , exchange bias , materials science , exchange interaction , condensed matter physics , competition (biology) , atomic force microscopy , chemical physics , nanotechnology , magnetic field , chemistry , physics , magnetization , magnetic anisotropy , ecology , quantum mechanics , biology
Based on almost all the data from the literature on spontaneous exchange bias (SEB), it is expected that the system will show SEB if it meets two conditions simultaneously: (i) there are the coexistence and competition of antiferromagnetic (AFM) and ferromagnetic (FM) interactions and (ii) AFM interaction should dominate but not be too strong in this competition. In order to verify this view, a systematic study on SEB has been performed in this work. Mn50Ni40Sn10 with strong FM interaction and without SEB is chosen as the mother composition, and the negative chemical pressure is introduced by the substitution of Sn by Si to enhance AFM interaction. It is found that a long-range FM ordering window is closed, and a long-range AFM ordering window is opened. As a result, SEB is triggered and a continuous tuning of the spontaneous exchange bias field (HSEB) from 0 Oe to 1300 Oe has been realized in a Mn50Ni40Sn10−xSix system by the enhanced AFM interaction
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