1. Crossover from spin-flop coupling to collinear spin alignment in antiferromagnetic/ferromagnetic nanostructures
- Author
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Anthony Young, Erik Folven, Jostein K. Grepstad, Yayoi Takamura, Jos E. Boschker, Andreas Scholl, Scott T. Retterer, and Thomas Tybell
- Subjects
Coupling ,Nanostructure ,Materials science ,Condensed matter physics ,Mechanical Engineering ,Bilayer ,Bioengineering ,General Chemistry ,Condensed Matter::Mesoscopic Systems and Quantum Hall Effect ,Condensed Matter Physics ,Condensed Matter::Materials Science ,Ferromagnetism ,Perpendicular ,Antiferromagnetism ,Condensed Matter::Strongly Correlated Electrons ,General Materials Science ,Anisotropy ,Spin-½ - Abstract
The technologically important exchange coupling in antiferromagnetic/ferromagnetic bilayers is investigated for embedded nanostructures defined in a LaFeO(3)/La(0.7)Sr(0.3)MnO(3) 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.
- Published
- 2012