Faculty Publications

Electronic And Magnetic Phase Transitions In (Sm0.65Sr0.35)Mno3 Induced By Temperature And Magnetic Field

Document Type

Article

Keywords

AC magnetic susceptibility, DC magnetization, Magnetoresistance, Manganese oxide

Journal/Book/Conference Title

Journal of Magnetism and Magnetic Materials

Volume

311

Issue

2

First Page

675

Last Page

682

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. (Sm0.65Sr0.35)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" magnetoresistance 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 Gd5(SixGe4-x) intermetallic alloys with a true first order phase transition. © 2006 Elsevier B.V. All rights reserved.

Department

Department of Physics

Original Publication Date

4-1-2007

DOI of published version

10.1016/j.jmmm.2006.08.033

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