Abstract
The spin wave resonance technique was utilized to investigate the interface magnetic properties in AlN/FeNi heterostructures. Obtained surface spin wave (SSW) mode becomes the uniform mode at a critical angle as applied field rotating to the normal direction. Beyond this angle SSW transforms into the uniform mode and the higher-order spin wave modes are also shown. The surface anisotropy caused by the interface pinning between AlN and FeNi resulted in an additional in-plane biaxial anisotropy, which was confirmed by the in-plane angular dependence of remanence measurement. The observed four-fold anisotropy may have potential application in magnetoelectric coupling based information devices.
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