Enhancement of magnetoresistance in La0.67Ca0.33MnO3/Pr0.7Ca0.3MnO3 epitaxial multilayers

Authors
Venimadhav, A Hegde, MS Rawat, R Das, I El Marssi, M
Citation
A. Venimadhav et al., Enhancement of magnetoresistance in La0.67Ca0.33MnO3/Pr0.7Ca0.3MnO3 epitaxial multilayers, J ALLOY COM, 326(1-2), 2001, pp. 270-274
Citations number
13
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF ALLOYS AND COMPOUNDS
ISSN journal
09258388 → ACNP
Volume
326
Issue
1-2
Year of publication
2001
Pages
270 - 274
Database
ISI
SICI code
0925-8388(20010809)326:1-2<270:EOMILE>2.0.ZU;2-7
Abstract
Multilayers of perovskite manganite oxides La0.67Ca0.33MnO3/Pr0.7Ca0.3MnO3, La0.67Ca0.33MnO3/LaMnO3 have been fabricated by pulsed laser deposition. Ma ganetoresistance (defining R(0)-R(H)/R(0)) of 98% has been observed in mult ilayers with Pr0.7Ca0.3MnO3 as the spacer layer. No enhancement is observed in multilayers with LaMnO3 as the spacer layer. Enhanced magnetoresistance in La0.67Ca0.33MnO3/Pr0.7Ca0.3MnO3 multilayers is explained on the basis o f induced double exchange in the Pr0.7Ca0.3MnO3 layer as Mn exists both in 3+ and 4+ states. Such a facility does not exist in La0.67Ca0.33MnO3/LaMnO3 as Mn is present only in the 3+ state in LaMnO3. (C) 2001 Elsevier Science BY. All rights reserved.