Dynamic Properties of Permalloy Thin Films

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概要

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• Free oscillations, switching and ferromagnetic resonance of Permalloy thin films are measured changing, for each film, various parameters including temperature. It is shown that the damping factor λin the free oscil lations of Permalloy thin film is composed of three parts as λ=λ_<in>+λ_<edd>+kH_y, where λ_<in> is due to the intrinsic damping plus the damping from the anisotropy dispersion, λ_<edd> due to the eddy current damping, which is represeted as 1.0×lO^<17>d^2(cps) as a function of the thickness d, and kH_y due to the high power effect probably caused by the increased excitation of the spin wave modes. In the last term H_y is the amplitude of the applied pulse field and k is a constant which depends on the film thickness. The value of λ_<in> is about 1.05x10^8 (cps) and is in good agreement with the minimum value of λ ever obtained for Permalloy films by various measurements.

• 社団法人日本物理学会の論文
• 1966-02-05

著者

• MATSUMOTO Gen

  Department of Physics, Faculty of Science, The University of Tokyo

• Iida Shuichi

  Department Of Physics Faculty Of Science The University Of Tokyo

• Satoh Takeo

  Department Of Physics University Of Tokyo

• Satoh Takeo

  Department Of Ophthalmology Yamagata University School Of Medicine

• Matsumoto Gen

  Department Of Physics University Of Tokyo

• Matsumoto Gen

  Department Of Chemistry Biology And Marine Science University Of The Ryukyus

• Iida Shuichi

  Department Of Physics Faculity Of Science University Of Tokyo

• Matsumoto G.

  Department of Physics, Faculty of Science, University of Tokyo

• Iida Shuichi

  Department of Applied Physics, Tokyo Institute of Technology

• Satoh Takeo

  Department of Allergy and Rheumatic Diseases, Japanese Red Cross Medical Center, Japan

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