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Analysis of Microwave Permeability and Damping Constant in Amorphous CoFeHfO Thin Film

비정질 CoFeHfO 박막 재료의 마이크로파 투자율 및 감쇠상수 분석

  • Published : 2009.08.31

Abstract

The saturation magnetization and uniaxial anisotropy constant were obtained from magnetization and torque curves measurement in high resistive CoFeHfO thin film. The measured results were used for the analysis of the microwave complex permeability based on Landau-Lifshitz-Gilbert (LLG) theory. The high resistive CoFeHfO thin films showed very low damping constants of ${\alpha}$ = 0.014. The results are interpreted in terms of various magnetic phase with very low damping constant, which were existing inside the CoFeHfO thin film, through the linewidth analysis of the ferromagnetic resonance signal with magnetic field.

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