Study of Oriented Polycrystalline Ferrites with Cubic Anisotropy
作者:
C. F. Kooi,
R. W. Moss,
D. C. Stinson,
期刊:
Journal of Applied Physics
(AIP Available online 1959)
卷期:
Volume 30,
issue 6
页码: 895-898
ISSN:0021-8979
年代: 1959
DOI:10.1063/1.1735259
出版商: AIP
数据来源: AIP
摘要:
A study was made of crystallite orientation in cubic ferrites when pressed in a magnetic field. One easy axis orients in the field direction, the other easy axes lying at random in or near a perpendicular plane. Experimental torque curves have the theoretically predicted shape. The magnetic field required for microwave resonance is lower than in the same nonoriented ferrite if the axis of alignment and the field are parallel. This occurs because the anisotropy fieldHais no longer randomly oriented but helps to supply part of the resonant field requirement. Values of saturation magnetization (Ms), anisotropy energy (K), and resonant field (Hr) at 14 775 mc/sec were measured on a series of oriented polycrystalline nickel cobalt ferrites. Values of the measured resonant field are compared with values obtained from Kittel's resonance relation using the independently measured values ofMsandK.
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