Magnetic state of pattern edge of nanoscale magnetic tunnel junctions (MTJs) affects their performance and its sensitive detection is highly demanded. In this work, we investigate the condition of the pattern edge using spin-wave resonance. We observed a distinctly different behavior in spin-wave resonance between two types of perpendicular CoFeB/MgO MTJs having different edge conditions.) The results were reproduced by an analytical model considering different boundary conditions (fixed or free) and exchange stiffness.
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