We report on the preparation and characterization of the double-perovskite compound with a Curie temperature of 390 K. We have fabricated both bulk sintered polycrystalline bars and high-quality epitaxial thin films on substrates by pulsed-laser deposition. The samples were characterized by thermogravimetric analysis, x-ray diffraction, electrical transport, and magnetization measurements. Polycrystalline samples containing a large number of grain boundaries show a large low-field magnetoresistance of up to 100% at 5 K. At room temperature, this effect is reduced to a few percent. Our results show that is an interesting candidate for room-temperature magnetoelectronic materials.
Spin-dependent transport in the double-perovskite
J. B. Philipp, D. Reisinger, M. Schonecke, A. Marx, A. Erb, L. Alff, R. Gross, J. Klein; Spin-dependent transport in the double-perovskite . Appl. Phys. Lett. 26 November 2001; 79 (22): 3654–3656. https://doi.org/10.1063/1.1421227
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