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首页> 外文期刊>Journal of Applied Physics >Static and Dynamic Behavior of Thin Permalloy Films
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Static and Dynamic Behavior of Thin Permalloy Films

机译：坡莫合金薄膜的静态和动态行为

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摘要

Thin magnetic films (∼1000 A) evaporated onto a heated glass substrate in the presence of a dc magnetic field develop a uniaxial magnetic anisotropy energy of the form Ek=Ksin2φ, with φ measured from the deposition field. Such films promise to outperform ferrite cores in digital-computer memory-systems by several orders of magnitude. A detailed static and dynamic theory based on the above anisotropy energy and the Landau-Lifshitz dynamical equation is presented. The static theory contains the unique feature of the coercive force parallel to the easy axis being dependent on a field in the plane of the film and perpendicular to the easy axis. Experimental verification of the theory is given. The dynamic theory considers both steady-state and pulse response. The steady-state solution is well known; the pulse solution must take very careful account of all the important torques acting in a switching experiment, and numerical results are obtained by the use of a digital computer. Experimentally, steady-state resonance is measured from 100 to 10 000 Mc and pulse switching down to 3 mμsec. Both types of experiment are in good agreement with each other and with the theory.
机译：在直流磁场的作用下蒸发到加热的玻璃基板上的磁性薄膜（〜1000 A）会产生形式为Ek =Ksin2φ的单轴磁各向异性能，其中φ是根据沉积场测得的。这种薄膜有望在数字计算机存储系统中胜过铁氧体磁芯几个数量级。提出了一种基于上述各向异性能和Landau-Lifshitz动力学方程的详细静态和动态理论。静态理论包含平行于易轴的矫顽力的独特特征，该矫顽力取决于薄膜平面中的场并垂直于易轴。对该理论进行了实验验证。动力学理论同时考虑了稳态和脉冲响应。稳态解决方案是众所周知的。脉冲解决方案必须非常仔细地考虑开关实验中所有重要的转矩，并且通过使用数字计算机可以获得数值结果。在实验中，稳态共振的测量范围是100到10000 Mc，脉冲切换到3毫秒。两种类型的实验彼此之间以及与理论上都非常吻合。

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  • 来源
    《Journal of Applied Physics》 |1958年第3期|共10页
  • 作者

    Smith D. O.;

  • 作者单位

    Lincoln Laboratory, Massachusetts Institute of Technology;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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