Microwave-assisted magnetization reversal in a Co/Pd multilayer with perpendicular magnetic anisotropy

作者：Nozaki Yukio^*; Narita Naoyuki; Tanaka Terumitsu; Matsuyama Kimihide

来源：Applied Physics Letters, 2009, 95(8): 082505.

DOI：10.1063/1.3213559

• cobalt
• coercive force
• ferromagnetic materials
• ferromagnetic resonance
• interface magnetism
• magnetic anisotropy
• magnetic domains
• magnetic multilayers
• magnetisation reversal
• microwave spectra
• nucleation
• palladium
• probability
• spectral line broadening

Microwave-assisted magnetization reversal in a rectangle of a Co/Pd multilayer with a perpendicular magnetic anisotropy is examined using vector network analyzer ferromagnetic resonance (FMR) spectroscopy. A microwave field is applied along the in-plane direction of the rectangle together with a negative dc easy-axis field smaller than the coercive field. Broadening or splitting of the peak profile in the FMR spectrum suggesting the formation of multidomain structure appears after the microwave field is applied. The dominance of microwave-assisted nucleation of magnetization is supported by the frequency dependence of the probability with which the multidomain structure appears.

• 出版日期2009-8-24