Hall-array measurements of flux creep parameters in Y-Ba-Cu-O crystals

Autor:	V. M. Vinokur, D. Majer, Avner Shaulov, Y. Wolfus, Yosef Yeshurun, Eli Zeldov, L. Burlachkov, Y. Abulafia, Ruslan Prozorov
Rok vydání:	1997
Předmět:	Superconductivity Flux pumping Materials science Field (physics) Condensed matter physics Flux Condensed Matter Physics Atomic and Molecular Physics and Optics Magnetic flux Creep Condensed Matter::Superconductivity General Materials Science Hall effect sensor Current density
Zdroj:	Journal of Low Temperature Physics. 107:455-465
ISSN:	1573-7357 0022-2291
Popis:	We describe the details of a new method for studying thermally activated flux creep in superconductors. this method employs an array of microscopic Hall sensors to probe the time evolution of the field profile in the sample. We analyze these data on the basis of a continuity equation which takes into account contributions to the relaxation process from both the in-plane and out-of-plane components of the induction field. This analysis enables direct determination of flux creep parameters such as the flux-line current density, flux-line velocity and the activation energy for flux creep. We demonstrate this method by presenting experimental data for YBa2Cu3O7-x crystals in the remanent state and in the presence of a field.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5a4cae98718a4ef5af45c3fac12863d5 https://doi.org/10.1007/bf02397227 Zobrazit plný text záznamu Full text from SpringerLink