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  Giant magnetoresistance due to a domain wall in Fe: Ab initio study

Yavorsky, B. Y., Mertig, I., Perlov, A. Y., Yaresko, A. N., & Antonov, V. N. (2002). Giant magnetoresistance due to a domain wall in Fe: Ab initio study. Physical Review B, 66(17): 174422, pp. 174422-174422. doi:10.1103/PhysRevB.66.174422.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-30DE-F Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0018-0671-7
Genre: Journal Article

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Yavorsky, B. Y., Author
Mertig, I., Author
Perlov, A. Y.1, Author              
Yaresko, A. N.1, Author              
Antonov, V. N.1, Author              
Affiliations:
1Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              

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 Abstract: The magnetoresistance due to a domain wall in pure Fe was studied theoretically by means of ab initio electronic structure calculations based on a linear muffin-tin orbital method modified for noncollinear magnets. The Bloch walls were modeled by a superlattice structure in the (001) direction of the bcc lattice with alternating regions of collinear and spiral-like magnetizations. The conductivity was calculated by means of the linearized Boltzmann equation in a relaxation time approximation. The magnetoresistance due to a domain wall (DW) is presented as a function of the angle between the magnetizations, domain-wall thickness, and domain size. The orientation dependence of the magnetoresistance due to a DW in pure Fe has cos-like behavior in contrary to the giant magnetoresistance in Fe/Cr superlattices. It was also shown that the presence of Cr increases the GMR amplitude in comparison with pure Fe separated by a noncollinear domain wall of equal size. The Kronig-Penney model was used in order to show that the oscillations of GMR as a function of domain size stem from quantum well states crossing the Fermi level.

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Language(s): eng - English
 Dates: 2002-11-01
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: eDoc: 18612
ISI: 000179611700066
DOI: 10.1103/PhysRevB.66.174422
 Degree: -

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Title: Physical Review B
  Alternative Title : Phys. Rev. B
Source Genre: Journal
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Pages: - Volume / Issue: 66 (17) Sequence Number: 174422 Start / End Page: 174422 - 174422 Identifier: ISSN: 1098-0121