Magnetic anisotropy and rotational hysteresis loss in exchange coupled Ni–Fe/Mn–Ir films
Magnetic anisotropy and rotational hysteresis loss in exchange coupled Ni–Fe/Mn–Ir films
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DOI：
10.1063/1.373081
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发表时间：
2000-04
影响因子：
3.2
通讯作者：
M. Tsunoda;Y. Tsuchiya;T. Hashimoto;M. Takahashi
中科院分区：
文献类型：
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作者：
M. Tsunoda;Y. Tsuchiya;T. Hashimoto;M. Takahashi
研究了Ni-Fe/Mn-Ir双层膜的磁各向异性和转动磁滞损耗。在沉积过程中的30 Oe的面内场用于定义Mn-Ir层的反铁磁（AF）对准轴。Ni-Fe层厚度保持在50埃，Mn-Ir层厚度范围为20至200埃。室温下的磁化强度和扭矩测量作为Mn-Ir层厚度dAF和所施加的磁场的函数。的磁化强度数据，获得在相同的方向上施加在沉积过程中的字段。磁化数据表明临界dAF值为37 A，记为dAFcr。对于dAF>dAFcr，数据显示沿场轴沿着移位的磁滞回线。转矩响应和旋转滞后特性对dAF和测量场都很敏感。(1)当dAF远小于dAFcr时，转矩曲线在磁场小于30-40 Oe或s时具有sin θ特性。
The magnetic anisotropy and rotational hysteresis loss in Ni–Fe/Mn–Ir bilayers were investigated for films prepared by an ultraclean sputtering deposition process. An in-plane field of 30 Oe during deposition served to define the antiferromagnetic (AF) alignment axis for the Mn–Ir layer. The Ni–Fe layer thickness was maintained at 50 A and the Mn–Ir layer thickness ranged from 20 to 200 A. Room temperature magnetization and torque measurements were made as a function of the Mn–Ir layer thickness dAF and the applied field. The magnetization data were obtained for fields applied in the same direction as during deposition. The magnetization data indicate a critical dAF value of 37 A, taken as dAFcr. For dAF>dAFcr, the data show hysteresis loops which are displaced along the field axis. The torque response and rotational hysteresis characteristics are sensitive to both dAF and the measuring field. (1) When dAF is much less than dAFcr, the torque curves have a sin θ characteristic at fields below 30–40 Oe or s...