Steady‐State and Pulse Measurement Techniques for Thin Magnetic Films in the vhf‐uhf Range
作者:
D. O. Smith,
G. P. Weiss,
期刊:
Journal of Applied Physics
(AIP Available online 1958)
卷期:
Volume 29,
issue 3
页码: 290-291
ISSN:0021-8979
年代: 1958
DOI:10.1063/1.1723103
出版商: AIP
数据来源: AIP
摘要:
A vhf‐uhf bridge consisting of two loops placed symmetrically in a rectangular coaxial cavity has been used to study steady‐state and pulse relaxation in thin (∼1000 A) Permalloy films. For steady‐state measurements a coaxial transformer converts the bridge output from balanced‐to‐ground to unbalanced‐to‐ground; measurements from 100 to 1500 Mc are currently possible. Pulse measurements utilize the ungrounded deflection plates of a wide‐band traveling‐wave oscilloscope; pulse response to 2 m&mgr;sec can be resolved. Drive‐pulse calibration is accomplished unambiguously by using some of the unique switching properties of films which have uniaxial anisotropy.
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