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Chinese Physics Letters Volume 26 Number 11 Create an alert RSS this journal

Luo Wei et al 2009 Chinese Phys. Lett. 26 117502 doi:10.1088/0256-307X/26/11/117502

Grain Size Effect on Electrical Conductivity and Giant Magnetoresistance of Bulk Magnetic Polycrystals

Luo Wei, Zhu Lin-Li and Zheng Xiao-Jing

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Abstract References Cited By

CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES

By solving the Boltzmann transport equation and considering the spin-dependent grain boundary scattering, the distribution of electrons in grains and the electrical transport properties in the applied magnetic field are studied. With regard to the dominant influence of grain boundary scattering which is taken as a boundary condition for the electrical transport, the grain size-dependent electrical conductivity is investigated. In addition, the reorientation of the relative magnetization between grains brings the change of the electron spin when the magnetonanocrystalline material is subjected to the magnetic field, resulting in the remarkable giant magnetoresistance effect.


PACS

75.47.De Giant magnetoresistance

75.50.Tt Fine-particle systems; nanocrystalline materials

75.60.Ej Magnetization curves, hysteresis, Barkhausen and related effects

72.20.My Galvanomagnetic and other magnetotransport effects

61.72.Mm Grain and twin boundaries

Subjects

Condensed matter: electrical, magnetic and optical

Semiconductors

Condensed matter: structural, mechanical & thermal

Nanoscale science and low-D systems

Dates

Issue 11 (November 2009)

Received 15 July 2009



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