Critical Dynamics above the Incommensurate Phase Transition of Rb 2 ZnCl 4 Studied by NMR

Autor:	K.-P. Holzer, D. Schüßler, J. Petersson, R. Walisch, Dieter Michel, U. Häcker
Rok vydání:	1995
Předmět:	Physics Larmor precession Phase transition Condensed matter physics Dynamics (mechanics) Phase (waves) General Physics and Astronomy Frequency dependence Phason Upper and lower bounds
Zdroj:	Europhysics Letters (EPL). 31:213-218
ISSN:	1286-4854 0295-5075
Popis:	Order parameter (OP) fluctuations are studied in the normal (N) phase of the incommensurately modulated (IC) system Rb2ZnCl4 by measuring the 87Rb NMR spin-lattice relaxation time T1. The results are analysed on the basis of dynamical-scaling laws. Since both the temperature and the frequency dependence of T1 reveal the slowing-down of the OP dynamics below the Larmor frequency near the N-IC phase transition, the critical dynamics could be studied quantitatively. As an upper bound for the phason frequency gap a value of 100 MHz is estimated.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::832dc3c801a4b794aefd9890d88838e8 https://doi.org/10.1209/0295-5075/31/4/005 Zobrazit plný text záznamu