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Switching Properties of Permalloy Cores of Varying Coercivity

机译:矫顽力坡莫合金芯的开关特性

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摘要

In attempting to develop a 4–79 molybdenum Permalloy core for use in a memory with nondestructive readout, studies have been made of switching properties of Permalloy tape cores with coercivities ranging from 0.1–1.0 oe, corresponding to heat treatments over a temperature range of 300–900°C. The switching time of a core can be shortened by means of auxiliary field pulses which help to nucleate domains of reverse magnetization, but have little effect on their rate of propagation. In general, auxiliary field pulses applied perpendicular to the direction of remanent magnetization are more effective than those applied antiparallel to it provided the latter are not large enough to cause switching by themselves. The timing of the auxiliary pulses is important. Many of the cores have a ``preferred'' direction presumably caused by small domains of extremely high coercivity. The experimental results are interpreted in the light of domain wall motion theory.
机译:为了开发4–79钼坡莫合金芯以用于无损读出的存储器中,已经研究了矫顽力为0.1–1.0 oe的坡莫合金带芯的开关特性,对应于300℃温度范围内的热处理–900°C。可以通过辅助场脉冲来缩短铁芯的切换时间,该辅助场脉冲有助于使反向磁化磁畴成核,但对其传播速率几乎没有影响。通常,垂直于剩磁方向施加的辅助场脉冲要比反平行施加的辅助场脉冲更有效,前提是后者的大小不足以引起自身的切换。辅助脉冲的定时很重要。许多磁芯具有``首选''方向,这大概是由极高矫顽力的小磁畴引起的。根据域壁运动理论解释了实验结果。

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  • 来源
    《Journal of Applied Physics》 |1958年第3期|共2页
  • 作者单位

    Remington Rand Univac, St. Paul, Minnesota;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
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