Scaling theory of magneto-resistance in disordered local moment ferromagnets

Details Scaling theory of magneto-resistance in disordered local moment ferromagnets Scaling theory of magneto-resistance in disordered local moment ferromagnets

2004-09-30

arxiv.org/abs/cond-mat/0410003v2

Phys. Rev. Lett. 94, 247202 (2005)

Physics

Condensed Matter

Materials Science

5 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.94.247202

We present a scaling theory of magneto-transport in Anderson-localized disordered ferromagnets. Within our framework a pronounced magnetic-field-sensitive resistance peak emerges naturally for temperatures near the magnetic phase transition. We find that the resistance anomaly is a direct consequence of the change in localization length caused by the magnetic transition. For increasing values of the external magnetic field, the resistance peak is gradually depleted and pushed towards higher temperatures. Our results are in good agreement with magneto-resistance measurements on a variety of disordered magnets.

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