Determination Of The Thickness Of Pulsed Laser Deposited Cylindrical Co Films By Their Magnetoelastic Effects
JOURNAL OF APPLIED PHYSICS(2004)
摘要
Soft magnetic Co films, with a grain size of 1-2 nm and thickness between approximate to1.3 and tens of nanometers were pulsed laser deposited on rotating metallic wire substrates, conferring them cylindrical geometry. These films showed a magnetostrictive property, making it possible to measure and study the magnetoelastic inverse Wiedemann effect, (IWE) of the longitudinal magnetic flux in the film as a function of the circular applied magnetic field, Phi(z)-H-phi. The IWE of these films was explained by the assumption of magnetic wall nucleation and magnetization rotation processes. This explanation allowed us to establish the relation of Phi(z) with the spontaneous magnetization M-s and with the film's thickness. Then using the measured Phi(z) and the known value of M-s: (1) we determine the thickness of the film by means of an inductive method; (2) we analyze the inaccuracy of the determined film thickness; (3) we achieve the limit of t(film,min)=1.3+/-0.3 nm in thickness for measuring the films' magnetic properties. (C) 2004 American Institute of Physics.
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关键词
magnetic anisotropy,thin film,magnetic properties,pulsed laser deposition,magnetic field,grain size,magnetic susceptibility
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