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Title: Understanding the magnetic anisotropy in Fe-Si amorphous alloys

Abstract

The origin of the magnetic anisotropy in a very disordered Fe-Si alloy has been investigated. The alloy containing 40 percent at. Si was prepared in the form of a thin film in a DC magnetron sputtering chamber. Structural disorder was obtained from Extended X-ray Absorption Fine Structure spectroscopy. The uniformity and lack of inhomogeneities at a microscopic level was checked by measuring their transverse magnetic susceptibility and hysteresis loops. The orbital component of the magnetic moment was measured by X-ray Magnetic Circular Dichroism spectroscopy. The orbital moment was extraordinary high, 0.4mB. Such a high value contrasted with the relatively small uniaxial anisotropy energy of the thin film (2kJ/m3). This suggests that the cause of the magnetic anisotropy in this alloy was a small degree of correlation in the orientation of the local orbital moments along a preferential direction.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Director. Office of Science; Spanish CICYT under Grant Nos. MAT99-0724 and HF/1999-041. (US)
OSTI Identifier:
820783
Report Number(s):
LBNL-50856
R&D Project: A580SS; TRN: US0400402
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 1 Aug 2002
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION; ALLOYS; ANISOTROPY; FINE STRUCTURE; HYSTERESIS; MAGNETIC CIRCULAR DICHROISM; MAGNETIC MOMENTS; MAGNETIC SUSCEPTIBILITY; MAGNETRONS; ORIENTATION; ORIGIN; SPECTROSCOPY; SPUTTERING; THIN FILMS; ADVANCED LIGHT SOURCE ALS

Citation Formats

Diaz, J, Hamdan, N M, Jalil, P, Hussain, Z, Valvidares, S M, and Alameda, J M. Understanding the magnetic anisotropy in Fe-Si amorphous alloys. United States: N. p., 2002. Web. doi:10.2172/820783.
Diaz, J, Hamdan, N M, Jalil, P, Hussain, Z, Valvidares, S M, & Alameda, J M. Understanding the magnetic anisotropy in Fe-Si amorphous alloys. United States. doi:10.2172/820783.
Diaz, J, Hamdan, N M, Jalil, P, Hussain, Z, Valvidares, S M, and Alameda, J M. Thu . "Understanding the magnetic anisotropy in Fe-Si amorphous alloys". United States. doi:10.2172/820783. https://www.osti.gov/servlets/purl/820783.
@article{osti_820783,
title = {Understanding the magnetic anisotropy in Fe-Si amorphous alloys},
author = {Diaz, J and Hamdan, N M and Jalil, P and Hussain, Z and Valvidares, S M and Alameda, J M},
abstractNote = {The origin of the magnetic anisotropy in a very disordered Fe-Si alloy has been investigated. The alloy containing 40 percent at. Si was prepared in the form of a thin film in a DC magnetron sputtering chamber. Structural disorder was obtained from Extended X-ray Absorption Fine Structure spectroscopy. The uniformity and lack of inhomogeneities at a microscopic level was checked by measuring their transverse magnetic susceptibility and hysteresis loops. The orbital component of the magnetic moment was measured by X-ray Magnetic Circular Dichroism spectroscopy. The orbital moment was extraordinary high, 0.4mB. Such a high value contrasted with the relatively small uniaxial anisotropy energy of the thin film (2kJ/m3). This suggests that the cause of the magnetic anisotropy in this alloy was a small degree of correlation in the orientation of the local orbital moments along a preferential direction.},
doi = {10.2172/820783},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {8}
}