Second harmonic generation and thermally stimulated depolarization current investigation of K1-xLixTaO3

DC FieldValueLanguage
dc.contributor.authorVoigt, P
dc.contributor.authorKapphan, S
dc.contributor.authorOliveira, L
dc.contributor.authorLi, MS
dc.date.accessioned2021-12-23T16:09:42Z-
dc.date.available2021-12-23T16:09:42Z-
dc.date.issued1995
dc.identifier.issn10420150
dc.identifier.urihttps://osnascholar.ub.uni-osnabrueck.de/handle/unios/8947-
dc.description7th Europhysical Conference on Defects in Insulating Materials (Eurodim 94), ECOLE NORMALE SUPIRIEURE LYON, LYON, FRANCE, JUL 05-08, 1994
dc.description.abstractthe incipient ferroelectric KTaO3 small substitutional Li-ions are known to induce dipolar microgregions due to their off-center dipole moment. A sensitive method to observe the appearance of non-inversion symmetric regions in K1-xLixTaO3 is based upon monitoring the second harmonic intensity (SHG) of Nd: YAG laser light. At low temperatures a considerable SHG intensity (calibrated with respect to LiNbO3) is observed with a characteristic temperature-, field- and Li-concentration dependence. The time and temperature dependence of the electric field induced SHG intensity change shows an Arrhenius-like behavior with fast and slow relaxation processes. For concentrations larger that x approximate to 0.02 the slow relaxation process with an activation energy of E(A) approximate to 86 meV has been interpreted as a reorientation of mainly antiparallel ferroelectric domains. Measurements of the thermally stimulated depolarization current (TSDC), performed after removing the bias field at LHe-temperature, yield for a x = 0.028 sample a broad current peak with a maximum at approximate to 60 K. A good fit to the experimental data can be reached for a distribution of relaxing dipoles according to a Havriliak-Negami model with a mean activation energy Delta A = 178 meV. The difference in activation energies will be discussed in terms of different reorientation processes.
dc.language.isoen
dc.publisherGORDON BREACH SCI PUBL LTD
dc.relation.ispartofRADIATION EFFECTS AND DEFECTS IN SOLIDS
dc.subjectFIELD
dc.subjectGLASS
dc.subjectK1-xLixTaO3
dc.subjectKTAO3
dc.subjectNuclear Science & Technology
dc.subjectPHASE-TRANSITION
dc.subjectPhysics
dc.subjectPhysics, Condensed Matter
dc.subjectPhysics, Fluids & Plasmas
dc.subjectsecond harmonic generation
dc.subjectsolid-solid phase transition
dc.subjectSTATE
dc.subjectthermally stimulated depolarization current
dc.titleSecond harmonic generation and thermally stimulated depolarization current investigation of K1-xLixTaO3
dc.typeconference paper
dc.identifier.doi10.1080/10420159508227220
dc.identifier.isiISI:A1995UD41300047
dc.description.volume134
dc.description.issue1-4
dc.description.startpage229
dc.description.endpage232
dc.contributor.orcid0000-0001-7277-4126
dc.contributor.researcheridI-5757-2012
dc.publisher.placeC/O STBS LTD PO BOX 90, READING, BERKS, ENGLAND RG1 8JL
dcterms.isPartOf.abbreviationRadiat. Eff. Defects Solids
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