The spontaneous strain in SrTiO3 in the quantum paraelectric regime: the dependence on sample preparation

DC FieldValueLanguage
dc.contributor.authorHunnefeld, H
dc.contributor.authorRutt, U
dc.contributor.authorSchneider, JR
dc.contributor.authorKapphan, S
dc.date.accessioned2021-12-23T16:12:51Z-
dc.date.available2021-12-23T16:12:51Z-
dc.date.issued1998
dc.identifier.issn09538984
dc.identifier.urihttps://osnascholar.ub.uni-osnabrueck.de/handle/unios/10304-
dc.description.abstractThe temperature dependence of the spontaneous strain in SrTiO3 has been studied using triple-axis diffractometers of high momentum-space resolution for synchrotron radiation with energies above 100 keV. In the temperature range from 40 to 80 K the experimental data are in excellent agreement with a Landau theory taking into account the quantum mechanical zero-point fluctuations. At temperatures below 40 K a difference between experiment and theory of about 4% occurs which is considered as an indication for a novel phase in the quantum paraelectric regime. The difference between the fitted theory and the experimental data is nearly the same for all of the samples investigated; the biggest difference is observed in the fit parameter describing the theoretical saturation value of the spontaneous strain at zero temperature. In absolute numbers the measured spontaneous strain is strongly sample dependent, i.e. flux-grown, float-zone-grown and Verneuil-grown crystals show differences in the spontaneous strain of about 30% at 10 K. On the other hand, only small variations are observed in samples which were subjected to different heat treatments, which determine the number of oxygen vacancies.
dc.language.isoen
dc.publisherIOP PUBLISHING LTD
dc.relation.ispartofJOURNAL OF PHYSICS-CONDENSED MATTER
dc.subjectENERGY SYNCHROTRON-RADIATION
dc.subjectLAUE GEOMETRY
dc.subjectNEUTRON-SCATTERING
dc.subjectPHASE
dc.subjectPhysics
dc.subjectPhysics, Condensed Matter
dc.subjectRESOLUTION FUNCTION
dc.subjectTRIPLE-CRYSTAL DIFFRACTOMETER
dc.titleThe spontaneous strain in SrTiO3 in the quantum paraelectric regime: the dependence on sample preparation
dc.typejournal article
dc.identifier.doi10.1088/0953-8984/10/28/023
dc.identifier.isiISI:000075047000023
dc.description.volume10
dc.description.issue28
dc.description.startpage6453
dc.description.endpage6459
dc.publisher.placeDIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
dcterms.isPartOf.abbreviationJ. Phys.-Condes. Matter
Show simple item record

Google ScholarTM

Check

Altmetric