Controlling the switching field in nanomagnets by means of domain-engineered antiferromagnets
Folven, Erik; Linder, Jacob; Gomonay, Helen V.; Scholl, Andreas; Doran, Andrew; Young, Anthony; Retterer, Scott; Malik, V.K.; Tybell, Per Thomas Martin; Takamura, Yayoi; Grepstad, Jostein
Journal article
Submitted version
Åpne
Permanent lenke
http://hdl.handle.net/11250/2465151Utgivelsesdato
2015Metadata
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- Institutt for fysikk [2685]
- Publikasjoner fra CRIStin - NTNU [37962]
Originalversjon
10.1103/PhysRevB.92.094421Sammendrag
Using soft x-ray spectromicroscopy, we investigate the magnetic domain structure in embedded nanomagnets defined in La0.7Sr0.3MnO3 thin films and LaFeO3/La0.7Sr0.3MnO3 bilayers. We find that shape-controlled antiferromagnetic domain states give rise to a significant reduction of the switching field of the rectangular nanomagnets. This is discussed within the framework of competition between an intrinsic spin-flop coupling and shape anisotropy. The data demonstrates that shape effects in antiferromagnets may be used to control the magnetic properties in nanomagnets.