The unconventional exchange-bias (EB) effect in single crystals of RFeO3(R=Nd,Sm) compensated ferrimagnets (fMs), composed of two antiferromagnetically (AFM) coupled R and Fe sublattices with opposite ferromagnetic (FM) moments, exhibiting the FM moment reversal via a fast spin switching is reported. In NdFeO3, the EB anisotropy field emerges and diverges upon approaching the compensation temperature TcompNd=9.2K, and changes sign with crossing TcompNd, in similarity to the behavior observed recently in ErFeO3. In contrast, SmFeO3 exhibits a substantial EB, not only at its TcompSm=4.8K, but also at higher temperatures up to 100 K, and the EB changes its sign with increasing cooling field. It is shown that in all known RFeO3 (R=Nd,Sm,Er) compensated fMs the field-induced FM moment reversal is similarly exchange biased near Tcomp.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics