Enhanced low field magnetoresistance at room temperature in La0.7Sr0.3MnO3/SrTiO3(SrZrO3) composites

Authors
Shlyakhtin, OA Oh, YJ Tretyakov, YD
Citation
Oa. Shlyakhtin et al., Enhanced low field magnetoresistance at room temperature in La0.7Sr0.3MnO3/SrTiO3(SrZrO3) composites, SOL ST COMM, 117(4), 2001, pp. 261-266
Citations number
15
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SOLID STATE COMMUNICATIONS
ISSN journal
00381098 → ACNP
Volume
117
Issue
4
Year of publication
2001
Pages
261 - 266
Database
ISI
SICI code
0038-1098(2001)117:4<261:ELFMAR>2.0.ZU;2-K
Abstract
Enhanced room temperature magnetoresistance (1.5-2.5% at H = 100 Oe) is obs erved for composites La0.7Sr0.3MnO3/ SrMeO3 (Me = Ti, Zr) with compositions close to the percolation boundary. Firing of the mechanical mixture of La0 .7Sr0.3MnO3, (LSM) and SrMeO3 at T = 900-1200 degreesC results in significa nt interaction between constituents and in the shift of the percolation thr eshold to higher LSM content. The values of enhanced magnetoresistance, obs erved near percolation boundaries, are poorly dependent on firing temperatu res but differ significantly for different insulating components. (C) 2001 Published by Elsevier Science Ltd.