Magnetoresistance in bicrystal grain-boundary junctions analyzed within the Stoner-Wohlfarth model
Journal article, 2005

Experimental data of bicrystal grain boundary magnetoresistance hysteresis shows that the resistance at remanence after saturation depends on whether the magnetic field was applied parallel or perpendicular to the grain boundary. In the latter case the behaviour can be described by the Stoner-Wohlfarth magnetization reversal model for coherent rotation of the magnetization, which leads to an alignment along the easy magnetization directions of the bicrystal in zero field. In the parallel configuration the magnetization directions of the two grains remain parallel in zero field. We have used this information to deduce an effective spin-polarization of P ~ 40 % of the grain boundary in a bicrystal of La0.7Sr0.3MnO3.

Spin electronics


Grain boundary


Robert Gunnarsson

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Maj Hanson

Chalmers, Applied Physics, Solid State Physics

Catherine Dubourdieu

INP Grenoble - ENSPG

Journal of Magnetism and Magnetic Materials

0304-8853 (ISSN)

Vol. 290-291 part 1 761-763

Subject Categories

Physical Sciences



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