Reversals of magnetization and exchange-bias in perovskite chromite YbCrO3.

Reversals of magnetization and exchange bias field were observed around 19 K in polycrystalline perovskite chromite YbCrO 3 . Both the reversals can be elucidated based on the antiferromagnetic interaction between the ferromagnetic component of Cr 3+ moments and the Yb 3+ moments. The low field magnetization exhibits a perfect linear correlation with the magnetization shift resulted from the exchange bias effect. Distinguished from other exchange bias systems, the dependence of H E at 10 K on the cooling field shows an almost undamped feature up to 85 kOe, indicating the stable exchange bias states in respective temperature region. [ABSTRACT FROM AUTHOR]