Thermal Depinning of Flux Lines inHgBa2CuO4+δfrom199Hg Spin-Lattice Relaxation

Autor:	Q. Xiong, Attilio Rigamonti, Ferdinando Borsa, B. J. Suh, D. R. Torgeson, Maurizio Corti, Sok J
Rok vydání:	1996
Předmět:	Physics Superconductivity Condensed matter physics Computer Science::Information Retrieval Thermal Relaxation (NMR) Spin–lattice relaxation General Physics and Astronomy Activation energy Anisotropy Magnetic flux Magnetic field
Zdroj:	Physical Review Letters. 76:1928-1931
ISSN:	1079-7114 0031-9007
Popis:	{sup 199}Hg NMR spin-lattice relaxation rates in an aligned powder sample of the anisotropic high-{ital T}{sub {ital c}} superconductor HgBa{sub 2}CuO{sub 4+{delta}} ({ital T}{sub {ital c}}=96 K) show anisotropy in the temperature interval 10{endash}50 K, with an extra contribution present for the external magnetic field parallel to the {ital c} axis. The extra contribution shifts with magnetic field in a way related to the irreversibility temperature {ital T}{sub irr}, indicating that the thermal motion of flux lines (FL{close_quote}s) is the cause of the extra relaxation. A simple model is presented to analyze the relaxation data and to extract values for the correlation time {tau}{sub {ital c}} and the effective activation energy {ital U} of the FL motion. {copyright} {ital 1996 The American Physical Society.}
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::878062e154861f490623a23fc8949695 https://doi.org/10.1103/physrevlett.76.1928 Zobrazit plný text záznamu