Misorientation angle dependence of bicrystal magnetoresistance within the model of coherent rotation

Bicrystal magnetoresistance hysteresis is studied within the model of coherent rotation of magnetization. The magnetoresistance hysteresis is calculated numerically in the limit of fully spin polarized current for symmetric bicrystal junctions with biaxial magnetic anisotropy and of varying misorien...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2004-06, Vol.16 (21), p.3761-3768
Main Authors: Gunnarsson, R, Hanson, M
Format: Article
Language:English
Subjects:
Condensed matter physics
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Conductivity phenomena in semiconductors and insulators
Electronic transport in condensed matter
Exact sciences and technology
Fysik
Galvanomagnetic and other magnetotransport effects
Kondenserade materiens fysik
NATURAL SCIENCES
NATURVETENSKAP
Physics
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Summary:Bicrystal magnetoresistance hysteresis is studied within the model of coherent rotation of magnetization. The magnetoresistance hysteresis is calculated numerically in the limit of fully spin polarized current for symmetric bicrystal junctions with biaxial magnetic anisotropy and of varying misorientation angles. The shape of the curves obtained from the model displays different characteristic features, depending on the angular relationships, which are consistent with experimental data from the literature. The results show a magnetoresistance increasing with increasing misorientation angle. The influence of biaxial magnetocrystalline anisotropy is reflected in a hump in the maximum magnetoresistance curve at around a misorientation angle of 25 deg. This structure is absent in the case of uniaxial anisotropy. (Cited examples: lanthanum aluminate, lanthanum manganese oxides, strontium titanate.)
ISSN:0953-8984
1361-648X
1361-648X
DOI:10.1088/0953-8984/16/21/024