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Simulation of EPR spectra of ThBr8:Pa4+ in the incommensurable phase

โœ Scribed by G. Zwanenburg; C.P. Keijzers; E. De Boer; J.C. Krupa

Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
328 KB
Volume
140
Category
Article
ISSN
0009-2614

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โœฆ Synopsis

At T= 95 K 8-ThBr., undergoes a phase transition from a "high-temperature" phase with space group I,_, to a structure with an incommensurable distortion wave along the crystallographic c axis. The modulation can be thought to consist of a combination of a "rotation" and a "twist" of the Br atoms in the plane perpendicular to the c axis. The EPR spectra at 4.2 K show the characteristic "edge singularities" of the incommensurable structure. A model is presented for the simulation of these spectra. It is based on the "twist" component of the modulation only.

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