Lock-in oscillations in magnetic hysteresis curves of YBa2Cu3O7-x single crystals
Lock-in oscillations in magnetic hysteresis curves of YBa2Cu3O7-x single crystals
We report the first direct experimental evidence of intrinsic pinning in hysteresis loops of untwinned YBa2Cu3O7-x single crystals, for magnetic fields perpendicular to the c axis. We have observed oscillations in the M-H loops that are well explained when one considers the layered structure of this compound. The oscillations are found to be periodic in H-1/2a and are induced by a succession of transitions between states for which the vortex lattice is commensurate with the crystal lattice periodicity in the direction perpendicular to the CuO2 planes. The following anisotropy parameters were extracted from the experimental results: Gamma cb=(mc/mb)1/2=6.3, Gamma ca=(mc/ma)1/2=5.6, and Gamma ab=(ma/mb)1/2=1.13.
3606-3609
Oussena, M.
6f73ee0e-91d9-4de7-8664-652fe5c548c8
de Groot, P.A.J.
98c21141-cf90-4e5c-8f2b-d2aae8efb84d
Gagnon, R.
a45ce1df-0d8e-49c8-a86e-faeddd7b426a
Taillefer, L.
f034a4d8-8435-4448-a2e7-bebf79590f75
1994
Oussena, M.
6f73ee0e-91d9-4de7-8664-652fe5c548c8
de Groot, P.A.J.
98c21141-cf90-4e5c-8f2b-d2aae8efb84d
Gagnon, R.
a45ce1df-0d8e-49c8-a86e-faeddd7b426a
Taillefer, L.
f034a4d8-8435-4448-a2e7-bebf79590f75
Oussena, M., de Groot, P.A.J., Gagnon, R. and Taillefer, L.
(1994)
Lock-in oscillations in magnetic hysteresis curves of YBa2Cu3O7-x single crystals.
Physical Review Letters, 72 (22), .
(doi:10.1103/PhysRevLett.72.3606).
Abstract
We report the first direct experimental evidence of intrinsic pinning in hysteresis loops of untwinned YBa2Cu3O7-x single crystals, for magnetic fields perpendicular to the c axis. We have observed oscillations in the M-H loops that are well explained when one considers the layered structure of this compound. The oscillations are found to be periodic in H-1/2a and are induced by a succession of transitions between states for which the vortex lattice is commensurate with the crystal lattice periodicity in the direction perpendicular to the CuO2 planes. The following anisotropy parameters were extracted from the experimental results: Gamma cb=(mc/mb)1/2=6.3, Gamma ca=(mc/ma)1/2=5.6, and Gamma ab=(ma/mb)1/2=1.13.
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Published date: 1994
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Local EPrints ID: 14747
URI: http://eprints.soton.ac.uk/id/eprint/14747
PURE UUID: 3b08b11b-e732-4abd-8881-4a54ea2367e0
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Date deposited: 04 Mar 2005
Last modified: 15 Mar 2024 05:31
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Author:
M. Oussena
Author:
P.A.J. de Groot
Author:
R. Gagnon
Author:
L. Taillefer
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