期刊
NANO LETTERS
卷 12, 期 5, 页码 2386-2390出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl300361e
关键词
Spin-flop coupling size effects; embedded nanostructures; magnetic dichroism; X-PEEM
类别
资金
- Oak Ridge National Laboratory by the Office of Basic Energy Sciences, U.S. Department of Energy
- Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231]
- U.S. Department of Energy [DE-AC05-00OR22725]
- Norwegian Research Council [176656, 190086]
The technologically important exchange coupling in antiferromagnetic/ferromagnetic bilayers is investigated for embedded nanostructures defined in a LaFeO3/La0.7Sr0.3MnO3 bilayer. Exploiting the element specificity of soft X-ray spectromicroscopy, we selectively probe the magnetic order in the two layers. A transition from perpendicular to parallel spin alignment is observed for these nanostructures, dependent on size and crystalline orientation. The results show that shape-induced anisotropy in the antiferromagnet can override the interface exchange coupling in spin-flop coupled nanostructures.
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