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Direct measurement of intrinsic atomic scale magnetostriction
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Ruffoni, Matthew Paul, Pascarelli, S., Groessinger, R., Turtelli, R. Sato, Bormio-Nunes, C. and Pettifer, R. F. (2008) Direct measurement of intrinsic atomic scale magnetostriction. Physical Review Letters, Volume 101 (Number 14). Article number 147202. doi:10.1103/PhysRevLett.101.147202 ISSN 0031-9007.
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Official URL: http://dx.doi.org/10.1103/PhysRevLett.101.147202
Abstract
Using differential x-ray absorption spectroscopy (DiffXAS) we have measured and quantified the intrinsic, atomic-scale magnetostriction of Fe81Ga19. By exploiting the chemical selectivity of DiffXAS, the Fe and Ga local environments have been assessed individually. The enhanced magnetostriction induced by the addition of Ga to Fe was found to originate from the Ga environment, where lambda(gamma,2)(approximate to (3/2)lambda(100)) is 390 +/- 40 ppm. In this environment, < 001 > Ga-Ga pair defects were found to exist, which mediate the magnetostriction by inducing large strains in the surrounding Ga-Fe bonds. For the first time, intrinsic, chemically selective magnetostrictive strain has been measured and quantified at the atomic level, allowing true comparison with theory.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Library of Congress Subject Headings (LCSH): | Magnetostriction, X-ray spectroscopy, Absorption spectra | ||||
Journal or Publication Title: | Physical Review Letters | ||||
Publisher: | American Physical Society | ||||
ISSN: | 0031-9007 | ||||
Official Date: | 3 October 2008 | ||||
Dates: |
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Volume: | Volume 101 | ||||
Number: | Number 14 | ||||
Number of Pages: | 4 | ||||
Article Number: | Article number 147202 | ||||
DOI: | 10.1103/PhysRevLett.101.147202 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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