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Title: Evidence from resistivity measurements along the c-axis for a transition within the vortex state for H {parallel} ab in single crystal Y{sub 1}Ba{sub 2}Cu{sub 3}O{sub 7}

Abstract

The authors developed a new six-face lithography technique on very small Y-123 single crystals, in order to obtain a current flow parallel to a unique crystallographic direction. Using this technique, they observe that the broadening of the resistive transition along the c-axis of a Y-123 single crystal in the presence of strong magnetic fields (H > H{sub c1}) {parallel} ab disappears below a well defined line in the H-T phase diagram. Above this line, dissipation is ohmic and field dependent. Below this line, a discontinuity appears in the resistivity curves, and the I-V behavior is strongly non linear. The shape of the resistive transition below the T{sub m}(H) line has a universal character, which remains unaffected by changes in the amplitude of the field. This unusual behavior contradicts any collective flux pinning model which predicts a field dependent activation energy and suggests a phase transition related to the depinning line.

Authors:
; ;  [1]
  1. CRTBT, Grenoble (France)
Publication Date:
OSTI Identifier:
127797
Report Number(s):
CONF-920376-
Journal ID: BAPSA6; ISSN 0003-0503; TRN: 96:000277
Resource Type:
Journal Article
Journal Name:
Bulletin of the American Physical Society
Additional Journal Information:
Journal Volume: 37; Journal Issue: 9; Conference: Meeting of the American Physical Society, Indianapolis, IN (United States), 16-20 Mar 1992; Other Information: PBD: Dec 1992
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; YTTRIUM OXIDES; MAGNETIC FLUX; PHASE TRANSFORMATIONS; BARIUM OXIDES; COPPER OXIDES; HIGH-TC SUPERCONDUCTORS; ELECTRIC CONDUCTIVITY

Citation Formats

Charalambous, M, Chaussy, J, and Lejay, P. Evidence from resistivity measurements along the c-axis for a transition within the vortex state for H {parallel} ab in single crystal Y{sub 1}Ba{sub 2}Cu{sub 3}O{sub 7}. United States: N. p., 1992. Web.
Charalambous, M, Chaussy, J, & Lejay, P. Evidence from resistivity measurements along the c-axis for a transition within the vortex state for H {parallel} ab in single crystal Y{sub 1}Ba{sub 2}Cu{sub 3}O{sub 7}. United States.
Charalambous, M, Chaussy, J, and Lejay, P. Tue . "Evidence from resistivity measurements along the c-axis for a transition within the vortex state for H {parallel} ab in single crystal Y{sub 1}Ba{sub 2}Cu{sub 3}O{sub 7}". United States.
@article{osti_127797,
title = {Evidence from resistivity measurements along the c-axis for a transition within the vortex state for H {parallel} ab in single crystal Y{sub 1}Ba{sub 2}Cu{sub 3}O{sub 7}},
author = {Charalambous, M and Chaussy, J and Lejay, P},
abstractNote = {The authors developed a new six-face lithography technique on very small Y-123 single crystals, in order to obtain a current flow parallel to a unique crystallographic direction. Using this technique, they observe that the broadening of the resistive transition along the c-axis of a Y-123 single crystal in the presence of strong magnetic fields (H > H{sub c1}) {parallel} ab disappears below a well defined line in the H-T phase diagram. Above this line, dissipation is ohmic and field dependent. Below this line, a discontinuity appears in the resistivity curves, and the I-V behavior is strongly non linear. The shape of the resistive transition below the T{sub m}(H) line has a universal character, which remains unaffected by changes in the amplitude of the field. This unusual behavior contradicts any collective flux pinning model which predicts a field dependent activation energy and suggests a phase transition related to the depinning line.},
doi = {},
url = {https://www.osti.gov/biblio/127797}, journal = {Bulletin of the American Physical Society},
number = 9,
volume = 37,
place = {United States},
year = {1992},
month = {12}
}