%0 Journal Article
%T Tunable giant exchange bias in single-phase rare earth-transition metal intermetallics YMn12-xFex with highly homogenous inter-sublattice exchange coupling
%A Yuanhua Xia
%A Rui Wu
%A Shunquan Liu
%A Honglin Du
%A Jingzhi Han
%A Changsheng Wang
%A Xiping Chen
%A Lei Xie
%A Y. C. Yang
%A Jinbo Yang
%J Physics
%D 2015
%I arXiv
%X In this paper, we have found a family of intermetallic compounds YMn12-xFex (x = 6.6-8.8) showing a bulk form of tunable giant exchange bias effect which arises from global interactions among ferromagnetic (FM) and antiferromagnetic (AFM) sublattices but not the interfacial exchange coupling or inhomogeneous magnetic clusters. A giant exchange bias with a loop shift up to 6.1 kOe has been observed in YMn4.4Fe7.6 compound with the strongest competing magnetic interactions. In a narrow temperature range, the exchange bias field shows a sudden switching off whereas the coercivity shows a sudden switching on with increasing temperature. This unique feature indicates that the inter-sublattice exchange coupling is highly homogenous, which can be perfectly interperated by our theoretical calculations.
%U http://arxiv.org/abs/1508.07833v1