Indications of spin polarized transport in Ba₂FeMoO₆ thin films

2017/07/05 by Simon Granville, I. L. Farrell, Granville, S. +9
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Multiferroics and related materials

paper · pdf · doi:10.48550/arxiv.1707.01208

openalex publication_date 2017/07/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We have investigated the magnetic and magnetotransport properties of Ba₂FeMoO₆ thin films produced by pulsed laser deposition from optimized bulk material. The films are comprised of grains of crystalline Ba₂FeMoO₆ with a disordered grain boundary region that lowers the net saturation magnetization of the film and prevents full magnetic alignment below a Curie temperature T_C∼305 K. Magnetotransport measurements point to the Ba₂FeMoO₆ grains retaining the high spin polarization of a half-metal up to T_C, while the grain boundaries greatly reduce the spin polarization of the intergrain electrical current due to spin-flip scattering. Our results show that a strong spin polarization of the electronic charge carriers is present even in Ba₂FeMoO₆ films that do not show the ideal bulk magnetic character.

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