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Correlation of Microstructure and Magnetotransport Properties of Epitaxially Grown La–Ca–Mn–O 3 Thin Films
Author(s) -
Habermeier H.U.,
Razavi F.,
Lebedev O.,
Gross G. M.,
Praus R.,
Zhang P. X.
Publication year - 1999
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/(sici)1521-3951(199909)215:1<679::aid-pssb679>3.0.co;2-h
Subject(s) - epitaxy , materials science , condensed matter physics , pulsed laser deposition , thin film , relaxation (psychology) , colossal magnetoresistance , microstructure , stress relaxation , magnetoresistance , nanotechnology , layer (electronics) , composite material , physics , psychology , social psychology , creep , quantum mechanics , magnetic field
We have investigated epitaxially grown single‐crystalline Ca‐doped LaMnO 3 thin films using the pulsed laser deposition technique in a case study aimed to explore the possibilities buried in epitaxial stress tailoring in order to control the transport properties of CMR materials beyond the limits set by equilibrium thermodynamics. Depending on the film thickness there is an abrupt transition from pseudomorphic to epitaxial granular growth observable which is related to the epitaxial strain of the films. This is associated with microscopic stress relaxation and leads to well controllable modifications of the atomic arrangements of the Mn–O sublattice in the films. Due to the interrelation of double exchange, spin‐, charge‐ and orbital ordering and the Jahn‐Teller effect mediated coupling of the electronic system to the crystal lattice, the magnetotransport properties of the films can be modified in a controllable way.