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@INPROCEEDINGS{Zhang:885885,
author = {Zhang, Hengbo},
title = {{I}nfluence of oxygen stoichiometry onto the physical
properties of {L}a0.7{S}r0.3{M}n{O}3-delta powder and thin
films},
reportid = {FZJ-2020-04161},
year = {2020},
abstract = {Oxygen vacancies play a crucial role for controlling
physical properties in complex oxides. The oxygen
stoichiometry can be tuned e.g. via absorbing or desorbing
oxygen and by this modifying the lattice structure,
magnetization and electronic transport properties. This
provides the possibility for technological applications,
e.g. in information storage, catalysis or sensorics.In a
previous study, the ideal oxygen pressure and plasma power
are found to grow a perfect Perovskite LSMO thin film on
single crystal substrates SrTiO3 using High Oxygen Pressure
Sputter Deposition (HOPSD). In this study here, a series of
samples with different deposition times are grown in order
to study the influence of the thickness onto the structural
and physical properties.Moreover, after preparation various
methods have been employed to deoxygenate the LSMO thin
films and powder, i.e. vacuum annealing, reductive
atmosphere annealing, and Aluminum assisted oxygen
desorption. By post-annealing, the oxygen-deficient
brownmillerite phase is prepared from the as-prepared
perovskite phase. The magnetic and electronic transport
properties evidence that the system becomes
antiferromagnetic and insulating.In addition, for a better
understanding of the magnetic behavior, Polarized Neutron
Reflectivity (PNR) had been used to study the magnetic depth
profile of the as-prepared system.},
month = {Oct},
date = {2020-10-15},
organization = {Digital Institute Seminar JCNS-2,
Forschungszentrum Jülich GmbH
(Germany), 15 Oct 2020 - 15 Oct 2020},
subtyp = {Invited},
cin = {JCNS-2 / PGI-4 / JARA-FIT},
cid = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
$I:(DE-82)080009_20140620$},
pnm = {144 - Controlling Collective States (POF3-144) / 524 -
Controlling Collective States (POF3-524) / 6212 - Quantum
Condensed Matter: Magnetism, Superconductivity (POF3-621) /
6213 - Materials and Processes for Energy and Transport
Technologies (POF3-621) / 6G4 - Jülich Centre for Neutron
Research (JCNS) (POF3-623)},
pid = {G:(DE-HGF)POF3-144 / G:(DE-HGF)POF3-524 /
G:(DE-HGF)POF3-6212 / G:(DE-HGF)POF3-6213 /
G:(DE-HGF)POF3-6G4},
typ = {PUB:(DE-HGF)31},
url = {https://juser.fz-juelich.de/record/885885},
}