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

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 Zusammenfassung: 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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Sprache(n): eng - English
 Datum: 2002-11-01
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: eDoc: 18612
ISI: 000179611700066
DOI: 10.1103/PhysRevB.66.174422
 Art des Abschluß: -

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Titel: Physical Review B
  Alternativer Titel : Phys. Rev. B
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 66 (17) Artikelnummer: 174422 Start- / Endseite: 174422 - 174422 Identifikator: ISSN: 1098-0121