Scaling theory of magneto-resistance in disordered local moment ferromagnets

Abstract

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.

arXiv comment5 pages, 2 figures

References in corpus (9)

• Dynamic Jahn-Teller Effect and Colossal Magnetoresistance in $L{a}_{1-x}{A}_{x}Mn{O}_3$
• Corrections to scaling at the Anderson transition
• Transition temperature of ferromagnetic semiconductors: a dynamical mean field study
• Magnetotransport properties of (Ga,Mn)As investigated at low temperature and high magnetic field
• Monte Carlo Study of Ferromagnetism in (III,Mn)V Semiconductors
• Temperature Dependence of the Conductivity in (La,Sr)MnO${}_3$
• Charge Localization in Disordered Colossal-Magnetoresistance Manganites
• Temperature Dependence of the Dielectric Constant and Resistivity of Diluted Magnetic Semiconductors
• Disorder-Induced Resistive Anomaly Near Ferromagnetic Phase Transitions

Cited by in corpus (15)

• Theory of ferromagnetic (III,Mn)V semiconductors
• Magnetic scattering of spin polarized carriers in (In,Mn)Sb dilute magnetic semiconductor
• Monte Carlo Study of Magnetic Resistivity in Semiconducting MnTe
• Electrical transport and ferromagnetism in Ga1-xMnxAs synthesized by ion implantation and pulsed-laser melting
• Charge inhomogeneities and transport in semiconductor heterostructures with a manganese $\delta$-layer
• Scaling analysis of the magnetoresistance in Ga_{1-x}Mn_xAs
• Electron-electron interaction in 2D and 1D ferromagnetic (Ga,Mn)As
• Spin Resistivity in Frustrated Antiferromagnets
• Spin Resistivity in the Frustrated $J_1-J_2$ Model
• Theory of optical conductivity for dilute GaMnAs
• Spin transport in magnetically ordered systems: effect of the lattice relaxation time
• External Control of a Metal-Insulator Transition in GaMnAs Wires
• Universal Scaling Theory of the Boundary Geometric Tensor in Disordered Metals
• Spin Transport in Magnetically Ordered Systems: Ferromagnets, Antiferromagnets and Frustrated Systems
• Substitutional disorder and charge localization in manganites