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Relaxation processes in calcium fluoride solid solutions with rare-earth and aluminium fluorides

Valerio, Mario Ernesto Giroldo, Blak, A.R., Chadwick, A.V. (1991) Relaxation processes in calcium fluoride solid solutions with rare-earth and aluminium fluorides. Radiation Effects and Defects in Solids, 119 (1). pp. 393-398. ISSN 1042-0150. (doi:10.1080/10420159108224907) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1080/10420159108224907

Abstract

Calcium fluoride solutions with Al3+, Yb3+ and La3+ fluorides were studied using the ITC technique. The observed relaxations at 130K and 210K were assigned to dipoles nnRs 3+-F− i(Rs = La or Yb) and to the L-shape clusters respectively. A band at 360K, due to big clusters of dipoles, was found in the Yb3+ doped samples and in the matrices with Al3+ together with La3+. Only the presence of Al3+ in the calcium fluoride is not sufficient to produce dipoles, but association with La3+ or Yb3+ aids the aggregation of dipoles forming big clusters. A Maxwell-Wagner-Sillars relaxation originates a peak at 290K, which is observed in almost all samples, including the pure one.

Item Type: Article
DOI/Identification number: 10.1080/10420159108224907
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK9001 Nuclear engineering
Divisions: Faculties > Sciences > Centre for Music Technology
Depositing User: P. Ogbuji
Date Deposited: 29 Jun 2011 12:39 UTC
Last Modified: 11 Jun 2019 09:08 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/22783 (The current URI for this page, for reference purposes)
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