skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Magnetic relaxation and intrinsic pinning in a single crystal of Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub [ital x]]

Abstract

Magnetic-relaxation experiments were performed on Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub [ital x]] single crystals with the direction of the field parallel to the [ital ab] plane. Based on the relaxation data, we have obtained relationships between the activation energy [ital U] and the current density [ital j] by an approach we developed previously. We found that the activation energy has a logarithmic dependence on [ital j] in a wide regime of driving force. It has been reported that CuO[sub 2] planes in high-[ital T][sub [ital c]] superconductors can act as strong intrinsic pinning centers and that the relation [ital U][similar to][ital U][sub 0]ln([ital j][sub [ital c]]/[ital j]) may describe such a pinning mechanism. Our experimental results have shown good agreement with such a physical model of intrinsic flux pinning.

Authors:
; ; ;  [1];  [2];  [3]
  1. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
  2. Instituto de Fisica, Caixa Postale 6165, Universidade Estadual de Campinas 13081-Campinas, Sao Paulo (Brazil)
  3. Department of Electrical Engineering, University of Notre Dame, Notre Dame, Indiana 46556 (United States)
Publication Date:
OSTI Identifier:
6951812
DOE Contract Number:  
W-31-109-ENG-38; FG02-90ER45427
Resource Type:
Journal Article
Journal Name:
Physical Review, B: Condensed Matter; (United States)
Additional Journal Information:
Journal Volume: 47:9; Journal ID: ISSN 0163-1829
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; HIGH-TC SUPERCONDUCTORS; MAGNETIC FLUX; BISMUTH OXIDES; CALCIUM OXIDES; COPPER OXIDES; CURRENT DENSITY; MAGNETIZATION; MONOCRYSTALS; RELAXATION; STRONTIUM OXIDES; ALKALINE EARTH METAL COMPOUNDS; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; CRYSTALS; OXIDES; OXYGEN COMPOUNDS; STRONTIUM COMPOUNDS; SUPERCONDUCTORS; TRANSITION ELEMENT COMPOUNDS; 360607* - Other Materials- Superconducting Properties- (1992-)

Citation Formats

Sengupta, S, Shi, Donglu, Wang, Zuning, Smith, M E, Salem-Sugui, S Jr, and McGinn, P J. Magnetic relaxation and intrinsic pinning in a single crystal of Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub [ital x]]. United States: N. p., 1993. Web. doi:10.1103/PhysRevB.47.5414.
Sengupta, S, Shi, Donglu, Wang, Zuning, Smith, M E, Salem-Sugui, S Jr, & McGinn, P J. Magnetic relaxation and intrinsic pinning in a single crystal of Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub [ital x]]. United States. doi:10.1103/PhysRevB.47.5414.
Sengupta, S, Shi, Donglu, Wang, Zuning, Smith, M E, Salem-Sugui, S Jr, and McGinn, P J. Mon . "Magnetic relaxation and intrinsic pinning in a single crystal of Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub [ital x]]". United States. doi:10.1103/PhysRevB.47.5414.
@article{osti_6951812,
title = {Magnetic relaxation and intrinsic pinning in a single crystal of Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub [ital x]]},
author = {Sengupta, S and Shi, Donglu and Wang, Zuning and Smith, M E and Salem-Sugui, S Jr and McGinn, P J},
abstractNote = {Magnetic-relaxation experiments were performed on Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub [ital x]] single crystals with the direction of the field parallel to the [ital ab] plane. Based on the relaxation data, we have obtained relationships between the activation energy [ital U] and the current density [ital j] by an approach we developed previously. We found that the activation energy has a logarithmic dependence on [ital j] in a wide regime of driving force. It has been reported that CuO[sub 2] planes in high-[ital T][sub [ital c]] superconductors can act as strong intrinsic pinning centers and that the relation [ital U][similar to][ital U][sub 0]ln([ital j][sub [ital c]]/[ital j]) may describe such a pinning mechanism. Our experimental results have shown good agreement with such a physical model of intrinsic flux pinning.},
doi = {10.1103/PhysRevB.47.5414},
journal = {Physical Review, B: Condensed Matter; (United States)},
issn = {0163-1829},
number = ,
volume = 47:9,
place = {United States},
year = {1993},
month = {3}
}