Giant negative magnetoresistance in perovskitelikeLa2/3Ba1/3MnOxferromagnetic films

1993/10/04 by R. von Helmolt, J. Wecker, B. Holzäpfel +2 · 14 citations
Chemistry · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Analytical Chemistry (journal) #Chemistry #Condensed matter physics #Curie temperature #Electrical resistivity and conductivity #Ferromagnetism #Magnetic and transport properties of perovskites and related materials #Magnetic field #Magnetization #Magnetoresistance #Materials science #Nuclear magnetic resonance #Physics #Polaron #Quantum mechanics #Rare-earth and actinide compounds

paper · doi:10.1103/physrevlett.71.2331

openalex publication_date 1993/10/04 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/07

Abstract

At room temperature a large magnetoresistance, \ensuremathΔR/R(H=0), of 60% has been observed in thin magnetic films of perovskitelike La-Ba-Mn-O. The films were grown epitaxially on SrTiO₃ substrates by off-axis laser deposition. In the as-deposited state, the Curie temperature and the saturation magnetization were considerably lower compared to bulk samples, but were increased by a subsequent heat treatment. The samples show a drop in the resistivity at the magnetic transition, and the existence of magnetic polarons seems to dominate the electric transport in this region.

Citations

• Ferromagnetic compounds of manganese with perovskite structure
• Giant Magnetoresistance of (001)Fe/(001)Cr Magnetic Superlattices

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• Ultrafast photoinduced reflectivity transients in(Nd0.5Sr0.5)MnO3
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• Conductance as a function of temperature in the double-exchange model
• Collapse of the charge ordering gap of Nd0.5Sr0.5MnO3in an applied magnetic field
• High-resolution hard x-ray photoemission investigation ofLa2−2xSr1+2xMn2O7(0.30≤x<0.50): Microscopic phase separation and surface electronic structure of a bilayer colossal magnetoresistance manganite
• Colossal magnetoresistance [wikipedia]