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Entropy driven fragmentation of the locked vortices in YBa2Cu3Oy single crystals

Entropy driven fragmentation of the locked vortices in YBa2Cu3Oy single crystals
Entropy driven fragmentation of the locked vortices in YBa2Cu3Oy single crystals
Using a high angular resolution vector magnetometer we have studied the components of the magnetic moment parallel and transverse to the CuO planes. The full shielding of the transverse field component originating from the infinite tilt modulus of the vortex locked state is observed for the lowest fields only. We relate the suppression of the transverse shielding to entropy induced fragmentation of the locked state by thermally activated kinks. We introduce a simple model that accounts for the reduced shielding as well as describes the angular behavior of the critical current.
5110-5113
Zhukov, A.A.
75d64070-ea67-4984-ae75-4d5798cd3c61
Küpfer, H.
fea91a23-485e-4898-a8ec-8a2a41d4cb3f
de Groot, P.A.J.
98c21141-cf90-4e5c-8f2b-d2aae8efb84d
Wolf, T.
f3c09486-9053-41ac-b7e3-5665f5535e37
Zhukov, A.A.
75d64070-ea67-4984-ae75-4d5798cd3c61
Küpfer, H.
fea91a23-485e-4898-a8ec-8a2a41d4cb3f
de Groot, P.A.J.
98c21141-cf90-4e5c-8f2b-d2aae8efb84d
Wolf, T.
f3c09486-9053-41ac-b7e3-5665f5535e37

Zhukov, A.A., Küpfer, H., de Groot, P.A.J. and Wolf, T. (1999) Entropy driven fragmentation of the locked vortices in YBa2Cu3Oy single crystals. Physical Review Letters, 83 (24), 5110-5113.

Record type: Article

Abstract

Using a high angular resolution vector magnetometer we have studied the components of the magnetic moment parallel and transverse to the CuO planes. The full shielding of the transverse field component originating from the infinite tilt modulus of the vortex locked state is observed for the lowest fields only. We relate the suppression of the transverse shielding to entropy induced fragmentation of the locked state by thermally activated kinks. We introduce a simple model that accounts for the reduced shielding as well as describes the angular behavior of the critical current.

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Published date: 1999

Identifiers

Local EPrints ID: 14741
URI: http://eprints.soton.ac.uk/id/eprint/14741
PURE UUID: 64f79c75-0860-4614-8521-ffb5eaada938

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Date deposited: 04 Mar 2005
Last modified: 11 Apr 2022 17:59

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Contributors

Author: A.A. Zhukov
Author: H. Küpfer
Author: P.A.J. de Groot
Author: T. Wolf

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