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Open AccessArticle

Instabilities of the Vortex Lattice and the Peak Effect in Single Crystal YBa2Cu4O8

1
Department of Physics, American University of Sharjah, P.O. Box 26666 Sharjah, UAE
2
Department of Physics, University of Alberta, Edmonton, AB T6G 2R3, Canada
3
Solid State Physics Laboratory, ETH, CH-8093 Zurich, Switzerland
*
Author to whom correspondence should be addressed.
Condens. Matter 2019, 4(3), 74; https://doi.org/10.3390/condmat4030074
Received: 18 June 2019 / Revised: 25 July 2019 / Accepted: 30 July 2019 / Published: 2 August 2019
(This article belongs to the Special Issue Layered Superconductors II)
We report on the measurements of the remnant magnetization, and hence critical current, in a single crystal of YBa2Cu4O8. A peak in the temperature dependence of the critical current is observed when the external magnetic field is tilted away from the a–b planes. The observed behavior is attributed to a thermally activated instability-driven vortex-lattice splitting or vortex chain formation. The nature of the peak and the possibility of a thermally-activated dimensional crossover have been discussed. View Full-Text
Keywords: remnant magnetization; vortex-lattice; peak effect remnant magnetization; vortex-lattice; peak effect
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MDPI and ACS Style

Egilmez, M.; Isaac, I.; Alnaser, A.S.; Bukowski, Z.; Karpinski, J.; Chow, K.H.; Jung, J. Instabilities of the Vortex Lattice and the Peak Effect in Single Crystal YBa2Cu4O8. Condens. Matter 2019, 4, 74.

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