Controlling the switching field in nanomagnets by means of domain-engineered antiferromagnets

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...

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Bibliographic Details
Published in:	Physical review. B, Condensed matter and materials physics Vol. 92; no. 9
Main Authors:	Folven, E., Linder, J., Gomonay, O. V., Scholl, A., Doran, A., Young, A. T., Retterer, S. T., Malik, V. K., Tybell, T., Takamura, Y., Grepstad, J. K.
Format:	Journal Article
Language:	English
Published:	United States American Physical Society (APS) 14-09-2015
Subjects:	CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Online Access:	Get full text
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Summary:	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.
Bibliography:	AC05-00OR22725; AC02-05CH11231 USDOE Office of Science (SC), Basic Energy Sciences (BES)
ISSN:	1098-0121 1550-235X
DOI:	10.1103/PhysRevB.92.094421