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dc.contributor.author
Nataf, Guillaume F.
dc.contributor.author
Aktas, Oktay
dc.contributor.author
Granzow, Torsten
dc.contributor.author
Salje, Ekhard K.H.
dc.date.accessioned
2019-12-06T14:08:53Z
dc.date.available
2017-06-11T22:23:42Z
dc.date.available
2019-12-06T14:08:53Z
dc.date.issued
2015
dc.identifier.issn
0953-8984
dc.identifier.issn
1361-648X
dc.identifier.other
10.1088/0953-8984/28/1/015901
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/109244
dc.identifier.doi
10.3929/ethz-b-000109244
dc.description.abstract
Monodomain and periodically poled LiNbO3 crystals (congruent composition) show dielectric and piezoelectric resonances between 100 K and 900 K. Dielectric measurements show resonances in some samples between 10–100 kHz. These resonances vanish under thermal anneal in monodomain crystals while they remain stable in periodically poled samples with high domain wall densities. The low activation energy of 0.18 eV suggests their electronic (bi-polaronic) origin. Resonant piezoelectric spectroscopy, RPS, shows two features in virgin samples: a relaxation peak at 420 K and a rapid hardening when the sample was slowly heated to ~500 K. The dynamic relaxation and the hardening are related to excitations and reorientations of Li defects. The relaxations and hardening are irreversibly suppressed by high temperature anneal. We do not observe domain wall related RPS resonances in annealed samples, which excludes the existence of highly charged walls. We suggest that domain walls stabilize polaronic states with (bi-)polarons located inside or near to the ferroelectric domain walls.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Institute of Physics
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/3.0/
dc.subject
lithium niobate
en_US
dc.subject
domain wall
en_US
dc.subject
polarons
en_US
dc.title
Influence of defects and domain walls on dielectric and mechanical resonances in LiNbO3
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 3.0 Unported
dc.date.published
2015-12-07
ethz.journal.title
Journal of Physics: Condensed Matter
ethz.journal.volume
28
en_US
ethz.journal.abbreviated
J. phys., Condens. matter
ethz.pages.start
015901
en_US
ethz.size
9 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.identifier.nebis
000510644
ethz.publication.place
Bristol
en_US
ethz.publication.status
published
en_US
ethz.date.deposited
2017-06-11T22:24:16Z
ethz.source
ECIT
ethz.identifier.importid
imp593653debaa3f97795
ethz.ecitpid
pub:170309
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-14T18:14:02Z
ethz.rosetta.lastUpdated
2020-02-15T22:54:28Z
ethz.rosetta.versionExported
true
ethz.COinS
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