Common exchange-biased spin switching mechanism in orthoferrites

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...

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Bibliographic Details
Published in:Physical review. B 2018-09, Vol.98 (9), p.094421, Article 094421
Main Authors: Fita, I., Wisniewski, A., Puzniak, R., Zubov, E. E., Markovich, V., Gorodetsky, G.
Format: Article
Language:English
Subjects:
Anisotropy
Antiferromagnetism
Crystals
Exchanging
Ferrimagnetism
Ferrimagnets
Ferromagnetism
Single crystals
Switching
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Summary: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.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.98.094421