NQR Study of Dynamics in Incommensurate Phases

Autor:	K Venu, R K Subramanian, V S S Sastry, S. Uma Maheswari
Rok vydání:	2000
Předmět:	Physics Condensed matter physics Dynamics (mechanics) General Physics and Astronomy Physical and Theoretical Chemistry Mathematical Physics
Zdroj:	Zeitschrift für Naturforschung A. 55:281-290
ISSN:	1865-7109 0932-0784
DOI:	10.1515/zna-2000-1-250
Popis:	Dynamic processes in solids exhibiting structurally incommensurate phases are briefly reviewed, and the application of NMR and NQR is discussed. The unique utility of these methods, - arising due to, on one hand, the microscopic resonant nature of the probe used and, on the other, the presence of periodic, though incommensurable, structure - , is brought out by presenting recent results in a prototype system (Rb2ZnCl4) in the presence of randomly quenched disorder. In particular, the interesting new methodology of measuring, by analysing NQR spin echo modulation, ultra-slow diffusion like collective motions of ensembles of atoms in the presence of pinning effects due to disorder is illustrated with new results.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f9df38558f8afe14a42e97ad9b276f37 https://doi.org/10.1515/zna-2000-1-250 Zobrazit plný text záznamu