Tunable exchange bias effects in perovskite YFe0.5Cr0.5O3

Exchange bias (EB) effects in YFe0.5Cr0.5O3, which exhibits magnetization reversal, were systemically investigated. Above the compensation temperature (T-comp), only negative EB field appears, whereas the sign of the EB field below T-comp can be reversed from positive to negative by applying a large cooling field. The difference between the EB behaviors above and below T-comp, which are strictly related to magnetization reversal, may originate from the competing magnetic anisotropy of the system. The sign reversal of both magnetization and EB field coexisting in a single system can be tuned in a preselected and convenient way. (C) 2011 Elsevier Ltd. All rights reserved.