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Title: Recovery of oscillatory magneto-resistance in phase separated La{sub 0.3}Pr{sub 0.4}Ca{sub 0.3}MnO{sub 3} epitaxial thin films

In-plane angular dependent magneto-resistance has been studied in La{sub 0.3}Pr{sub 0.4}Ca{sub 0.3}MnO{sub 3} (LPCMO) manganite thin films deposited on the (100) oriented NdGaO{sub 3}, and (001) oriented SrTiO{sub 3} and LaAlO{sub 3} substrates. At temperatures where the electronic phase separation is the strongest, a metastable irreversible state exists in the films whose resistivity ρ attains a large time dependent value. The ρ decreases sharply with an increasing angle θ between the magnetic field and the current, and does not display an expected oscillatory cos{sup 2}θ/sin{sup 2}θ dependence for all films. The regular oscillations are recovered during repetitive sweeping of θ between 0° and 180°. We discuss possible factors that could produce these unusual changes in the resistivity.
Authors:
; ; ; ; ;  [1] ;  [2] ;  [3]
  1. Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1 (Canada)
  2. Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CB2 3QZ (United Kingdom)
  3. Department of Physics, American University of Sharjah, Sharjah (United Arab Emirates)
Publication Date:
OSTI Identifier:
22253924
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 23; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; EPITAXY; LANTHANUM COMPOUNDS; MAGNETIC FIELDS; MAGNETORESISTANCE; MATERIALS RECOVERY; STRONTIUM TITANATES; THIN FILMS; TIME DEPENDENCE