Role of disorder in phase coexistence in manganites: Noise in layered films

Akilan Palanisami, Maitri Warusawithana, J. N. Eckstein, M. B. Weissman, and N. D. Mathur
Phys. Rev. B 72, 024454 – Published 25 July 2005

Abstract

Films of La23Ca13MnO3 were prepared via atomic layer-by-layer epitaxy both as standard solid-solution alloys and as A-site-ordered superlattices of LaMnO3 and CaMnO3 layers. The transport properties were similar, although with a shifted and broadened metal-insulator transition temperature TC in the ordered material. Transport noise near TC was also similar, in both cases revealing a narrow peak in noise magnitude versus temperature. The phase coexistence region near TC has little dependence on the intrinsic disorder of the chemical alloy.

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  • Received 18 April 2005

DOI:https://doi.org/10.1103/PhysRevB.72.024454

©2005 American Physical Society

Authors & Affiliations

Akilan Palanisami1, Maitri Warusawithana1, J. N. Eckstein1, M. B. Weissman1, and N. D. Mathur2

  • 1Department of Physics, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, Illinois 61801-3080, USA
  • 2Department of Materials Science, University of Cambridge, Cambridge CB2 3QZ, United Kingdom

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Issue

Vol. 72, Iss. 2 — 1 July 2005

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