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Title: Time dependent effects and transport evidence for phase separation in La{sub 0.5}Ca{sub 0.5}MnO{sub 3}

Abstract

The ground state of La{sub 1-x}Ca{sub x}MnO{sub 3} changes from a ferromagnetic metallic to an antiferromagnetic charge-ordered state as a function of Ca concentration at x{approx}0.50. We present evidence from transport measurements on a sample with x=0.50 that the two phases can coexist, in agreement with other observations of phase separation in these materials. We also observe that, by applying and then removing a magnetic field to the mainly charge-ordered state at some temperatures, we can ''magnetically anneal'' the charge order, resulting in a higher zero-field resistivity. We also observe logarithmic time dependence in both resistivity and magnetization after a field sweep at low temperatures. (c) 2000 American Institute of Physics.

Authors:
 [1];  [2];  [1]
  1. Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556 (United States)
  2. Material Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
Publication Date:
OSTI Identifier:
20216253
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 87; Journal Issue: 9; Other Information: PBD: 1 May 2000; Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; LANTHANUM OXIDES; CALCIUM OXIDES; MANGANESE OXIDES; PHASE STUDIES; GROUND STATES; MAGNETIZATION; ELECTRIC CONDUCTIVITY; TEMPERATURE DEPENDENCE; CHARGE STATES; EXPERIMENTAL DATA

Citation Formats

Roy, M., Mitchell, J. F., and Schiffer, P. Time dependent effects and transport evidence for phase separation in La{sub 0.5}Ca{sub 0.5}MnO{sub 3}. United States: N. p., 2000. Web. doi:10.1063/1.372537.
Roy, M., Mitchell, J. F., & Schiffer, P. Time dependent effects and transport evidence for phase separation in La{sub 0.5}Ca{sub 0.5}MnO{sub 3}. United States. doi:10.1063/1.372537.
Roy, M., Mitchell, J. F., and Schiffer, P. Mon . "Time dependent effects and transport evidence for phase separation in La{sub 0.5}Ca{sub 0.5}MnO{sub 3}". United States. doi:10.1063/1.372537.
@article{osti_20216253,
title = {Time dependent effects and transport evidence for phase separation in La{sub 0.5}Ca{sub 0.5}MnO{sub 3}},
author = {Roy, M. and Mitchell, J. F. and Schiffer, P.},
abstractNote = {The ground state of La{sub 1-x}Ca{sub x}MnO{sub 3} changes from a ferromagnetic metallic to an antiferromagnetic charge-ordered state as a function of Ca concentration at x{approx}0.50. We present evidence from transport measurements on a sample with x=0.50 that the two phases can coexist, in agreement with other observations of phase separation in these materials. We also observe that, by applying and then removing a magnetic field to the mainly charge-ordered state at some temperatures, we can ''magnetically anneal'' the charge order, resulting in a higher zero-field resistivity. We also observe logarithmic time dependence in both resistivity and magnetization after a field sweep at low temperatures. (c) 2000 American Institute of Physics.},
doi = {10.1063/1.372537},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 9,
volume = 87,
place = {United States},
year = {2000},
month = {5}
}