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Analysis Interaction Field Strength and Spectrum from Microhysteresis Loops

Published online by Cambridge University Press:  21 March 2011

Lin-Xiu Ye ,
Jia-Mou Lee  and
Te-ho Wu
Lin-Xiu Ye
Affiliation:
Graduate school of Engineering Science & Technology and Taiwan SPIN Research Center, Nat'l Yunlin Univ. of Science and Technology, 123 University Road, Section 3, Douliou, Yunlin, 64002, Taiwan
Jia-Mou Lee
Affiliation:
Graduate school of Engineering Science & Technology and Taiwan SPIN Research Center, Nat'l Yunlin Univ. of Science and Technology, 123 University Road, Section 3, Douliou, Yunlin, 64002, Taiwan
Te-ho Wu
Affiliation:
Graduate school of Engineering Science & Technology and Taiwan SPIN Research Center, Nat'l Yunlin Univ. of Science and Technology, 123 University Road, Section 3, Douliou, Yunlin, 64002, Taiwan
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Abstract

In this paper, we present a direct method to analyze the mechanism of magnetic domain reversal for a series of amorphous Dyx(FeCo)1-x magnetic thin films and whereby we obtained the distributions of the coercivities and interaction fields from 90,000 measurements of the microhysteresis loops. The standard deviations of the coercivity and the interaction field distributions, σi and σk, can be estimated by fitting the experimental data with the Gaussian- Preisach function. The results show that the interaction field decreases as Dy composition approaches the compensation point. The reversal mechanism is dominated by nucleation when σi is smaller than σk. The relationships between the magnetization reversal and interaction field strength are discussed

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 998: Symposium J – Nanoscale Magnetics and Device Applications , 2007 , 998-J08-17
Copyright
Copyright © Materials Research Society 2007

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References

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