2004/10/31 by Gergely Zaránd, Gergely Zarand, Cătălin Paşcu Moca +3
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Anomaly (physics) #Condensed matter physics #Ferromagnetism #Magnetic and transport properties of perovskites and related materials #Magnetic field #Magnetic moment #Magnetic properties of thin films #Magnetoresistance #Materials science #Physics #Quantum mechanics #Scaling #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevlett.94.247202
published as Phys. Rev. Lett. 94, 247202 (2005) · 5 pages, 2 figures
arxiv created 2004/11/15 · openalex publication_date 2005/06/21 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present a scaling theory of magnetotransport 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 magnetoresistance measurements on a variety of disorder magnets.