Electronic and magnetic phase transitions in (Sm0.65Sr0.35)MnO3 induced by temperature and magnetic field

TitleElectronic and magnetic phase transitions in (Sm0.65Sr0.35)MnO3 induced by temperature and magnetic field
Publication TypeJournal Article
Year of Publication2007
AuthorsLevin EM, Shand PM
Journal TitleJournal of Magnetism and Magnetic Materials
Volume311
Pages675-682
Date PublishedApr
Type of ArticleArticle
ISBN Number0304-8853
Accession NumberISI:000245495700032
KeywordsAC magnetic, COLOSSAL MAGNETORESISTANCE, DC magnetization, electrical-resistance, gd-5(si2ge2), giant magnetoresistance, magnetoresistance, manganese oxide, MANGANITES, single-crystals, susceptibility
Abstract

Temperature (4.2-260 K) and magnetic field (0-50 kOe) dependencies of the DC electrical resistance, DC magnetization, and AC magnetic susceptibility of (Sm0.65Sr0.35)MnO3 prepared from high purity components have been studied. (Sm(0.65)Sr(0.3)5)MnO3 undergoes a temperature-induced transition between low-temperature ferromagnetic metallic and high-temperature paramagnetic insulating-like states. A magnetic field strongly affects this transition resulting in a metallic state and "colossal" magneto resistance in the vicinity of the metal <-> insulator transition. Magnetic and electric properties of(Sm0.65Sr0.35)MnO3 are different compared to those reported earlier for similar composition, which is attributable to the purity of the starting materials and/or different process of synthesis. The character of phase transformations observed in (Sm0.65Sr0.35)MnO3 is compared to that reported for Gd-5(SixGe4-x) intermetallic alloys with a true first order phase transition. (C) 2006 Elsevier B.V. All rights reserved.

DOI10.1016/j.jmmm.2006.08.033
Alternate JournalJ. Magn. Magn. Mater.