Structural, magnetic, and transport properties in a Cu-doped La0.7Ca0.3MnO3 system

Authors
Wang, KY Song, WH Dai, JM Ye, SL Wang, SG Fang, J Chen, JL Gao, BJ Du, JJ Sun, YP
Citation
Ky. Wang et al., Structural, magnetic, and transport properties in a Cu-doped La0.7Ca0.3MnO3 system, J APPL PHYS, 90(12), 2001, pp. 6263-6267
Citations number
17
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF APPLIED PHYSICS
ISSN journal
00218979 → ACNP
Volume
90
Issue
12
Year of publication
2001
Pages
6263 - 6267
Database
ISI
SICI code
0021-8979(200112)90:12<6263:SMATPI>2.0.ZU;2-8
Abstract
The structural, magnetic, and transport properties of La0.7Ca0.3Mn1-xCuxO3 (0 less than or equal tox less than or equal to0.2) have been investigated. The maximum magnetoresistance (MR) is about 4x10(6)% for the sample with x =0.15, which is about similar to 10(4) times the maximum MR for samples wit h x less than or equal to0.1. A change in the structural parameters and mag netic and resistivity properties of the samples shows that Cu exists in Cu3 + ionic form in the sample with x less than or equal to0.05. However, Cu2ions begin to appear and then they increase with further Cu doping. (C) 200 1 American Institute of Physics.