Correlated reorientations in NH4Al(SO4) · 12 H2O single crystals

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dc.contributor.authorBöhmer, Roland
dc.contributor.authorLunkenheimer, P.
dc.contributor.authorVij, J. K.
dc.contributor.authorSvare, I.
dc.date.accessioned2008-06-13T09:41:42Z
dc.date.available2008-06-13T09:41:42Z
dc.date.issued1990-06-18
dc.description.abstractSingle crystals of aluminium ammonium alum NH4Al(SO4)2.12H2O were investigated using dielectric spectroscopy in the frequency range 1 kHz to 1 GHz. On approaching the ferroelectric transition at 58 K from above, a monodispersive polar mode is observed to slow down. The relaxation data can be described in terms of a pure Arrhenius law. The analysis of the dielectric loss reveals that in the paraelectric phase the static susceptibility cannot be described by a single Curie-Weiss law. The thermal variations of the Curie constant indicate that the dipolar correlations of the ammonium ions increase as the temperature is lowered.en
dc.identifier.citationBöhmer, R.; Lunkenheimer, P.; Vij, J. K.; Svare, I.: Correlated reorientations in NH4Al(SO4) · 12 H2O single crystals. In: Journal of Physics: Condensed Matter Nr. 24, Jg. 2(1990), S. 5433-5438, doi: 10.1088/0953-8984/2/24/014.de
dc.identifier.doi10.1088/0953-8984/2/24/014
dc.identifier.urihttp://hdl.handle.net/2003/25561
dc.identifier.urihttp://dx.doi.org/10.17877/DE290R-7496
dc.identifier.urlhttp://dx.doi.org/10.1088/0953-8984/2/24/014
dc.language.isoende
dc.publisherIOP Publishingen
dc.rightsCopyright © Institute of Physics and IOP Publishing Limited 1990.en
dc.subject.ddc530
dc.titleCorrelated reorientations in NH4Al(SO4) · 12 H2O single crystalsen
dc.typeTextde
dc.type.publicationtypearticlede
dcterms.accessRightsrestricted

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