Paper Title:
Observation of Domain Wall Resistance in La0.7Ca0.3MnO3 Films
  Abstract

We report the study of the magnetoresistance (MR) and resistivity as a function of temperature in epitaxial thin films of the La0.67Ca0.33MnO3 type (LCMO). The films deposited onto Y-cut of single-crystalline LiNbO3 (LNO) substrates by pulsed-laser deposition in an on-axis geometry. For comparison, the same manganite film deposited onto LaAlO3 (LAO) substrate is studied. The MR of LCMO/LNO film is found to be anisotropic and exhibits a hysteresis loops in low magnetic fields. When magnetic field is parallel to the film plane a number of jumps are observed in the MR below magnetic fields H~6 kOe. These jumps reflect the presence of pinning centers for domain walls. Evidently, a lattice deformation produced by a mismatch of lattice constants LCMO film and LNO, which lead to distortion of the film, is the origin of such strong pinning centers.

  Info
Periodical
Solid State Phenomena (Volumes 152-153)
Edited by
N. Perov
Pages
120-122
DOI
10.4028/www.scientific.net/SSP.152-153.120
Citation
K.V. Dyakonov, V.V. Popov, V.P. Dyakonov, P. Gierlowski, S.J. Lewandowski, H. Szymczak, "Observation of Domain Wall Resistance in La0.7Ca0.3MnO3 Films", Solid State Phenomena, Vols. 152-153, pp. 120-122, 2009
Online since
April 2009
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