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Title: Ultra-sharp oscillatory magneto-resistance in spatially confined La{sub 0.3}Pr{sub 0.4}Ca{sub 0.3}MnO{sub 3} epitaxial thin films

Our investigations of magneto-transport properties of La{sub 0.3}Pr{sub 0.4}Ca{sub 0.3}MnO{sub 3} manganite thin films of reduced dimensions revealed dramatic changes in R(θ), the dependence of resistivity on the angle between the magnetic field direction and the current direction, and consequently in the anisotropic magneto-resistance. A regular oscillatory  sin{sup 2}θ form of R(θ) is replaced by a very sharp rectangular-shaped ones when the dimensions of the system become comparable to the size of the intrinsic electronic domains. We discuss possible mechanisms that could be responsible for these changes.
Authors:
; ; ; ; ;  [1]
  1. Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1 (Canada)
Publication Date:
OSTI Identifier:
22350961
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 16; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANISOTROPY; CALCIUM COMPOUNDS; ELECTRIC CONDUCTIVITY; EPITAXY; LANTHANUM COMPOUNDS; MAGNETIC FIELDS; MAGNETORESISTANCE; MANGANATES; PRASEODYMIUM COMPOUNDS; THIN FILMS