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Titolo:
Experimental study of local flux creep on a cylindrical melting-textured grown YBa2Cu3O7-delta sample at applied fields
Autore:
Liu, F; Huang, JW; Liu, W; Xiao, L; Ren, HT; Jiao, YL; Zheng, MH; Yan, SS;
Indirizzi:
Peking Univ, Dept Phys, State Key Lab Artificial Microstruct & Mesoscop P,Beijing 100821, Peoples R China Peking Univ Beijing Peoples R China 100821 ijing 100821, Peoples R China Gen Res Inst NonFerrous Met, Beijing 100088, Peoples R China Gen Res Inst NonFerrous Met Beijing Peoples R China 100088 oples R China
Titolo Testata:
ACTA PHYSICA SINICA
fascicolo: 10, volume: 50, anno: 2001,
pagine: 2001 - 2007
SICI:
1000-3290(200110)50:10<2001:ESOLFC>2.0.ZU;2-I
Fonte:
ISI
Lingua:
CHI
Soggetto:
HIGH-TEMPERATURE SUPERCONDUCTORS; HIGH-TC SUPERCONDUCTORS; MAGNETIC-RELAXATION; CRYSTAL; VORTICES;
Keywords:
local flux creep; activation energy; local magnetic relaxation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Liu, F Peking Univ, Dept Phys, State Key Lab Artificial Microstruct & Mesoscop P,Beijing 100821, Peoples R China Peking Univ Beijing Peoples R China 100821 00821, Peoples R China
Citazione:
F. Liu et al., "Experimental study of local flux creep on a cylindrical melting-textured grown YBa2Cu3O7-delta sample at applied fields", ACT PHY C E, 50(10), 2001, pp. 2001-2007

Abstract

Using semiconductor Hall probes, we studied the local flux creep on a cylindrical melting-textured grown YBa2Cu3O7-delta a sample at liquid nitrogen temperature and low applied field. The measurements on the top surface of the sample show that the local flux creep fits well the logarithmic time dependence in both the field-on and field-off cases. The obtained activation energy U-0 in the field-on case is greater than the field-off one. The localmagnetization was almost changing with the applied field synchronously in the measurement of magnetic hysteresis loops. The field was almost identical at a fixed local point under various sweep ratios of the applied field. The results imply that besides the side surface the applied field penetratesinto the upper and lower surfaces to a certain extent too. The disparity in U-0 results from the difference of the angle between the flux line and the ab plane. This study also shows that the measurement of flux creep at thelow field has a potential to become a simple and effective method to investigate the pinning property in large size samples.

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Documento generato il 24/01/20 alle ore 12:26:24