Influence of the ferromagnetic layer on the pair breaking and low alternating current field magnetic response in superconductor/ferromagnet bilayer

Samal, D and Kumar, Anil PS (2011) Influence of the ferromagnetic layer on the pair breaking and low alternating current field magnetic response in superconductor/ferromagnet bilayer. In: Journal of Applied Physics, 109 (7).

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Abstract

We investigate the influence of the ferromagnetic layer on the magnetic and transport properties of YBa2Cu3O7-delta in YBa2Cu3O7-delta (YBCO)/La0.7Sr0.3MnO3 (LSMO) bilayers. The temperature dependent dc magnetization study reveals the presence of magnetic anisotropy in YBCO/LSMO bilayer as compared to the pure YBCO layer. The ac susceptibility study on YBCO/LSMO bilayers reveals stronger pinning and the temperature dependent critical current is found to be less prone to temperature. Besides, the current (I) dependent electrical transport studies on YBCO/LSMO exhibit a significant reduction in the superconducting T-c with increase in I and it follows I-2/3 dependence in accord with the pair breaking effect. The higher reduction of superconducting T-c in YBCO/LSMO is believed to be due to the enhanced pair-breaking induced by the spin polarized carriers being injected into the superconductor. (C) 2011 American Institute of Physics. doi: 10.1063/1.3560029]

Item Type:	Journal Article
Publication:	Journal of Applied Physics
Publisher:	American Institute of Physics
Additional Information:	Copyright of this article belongs to American Institute of Physics.
Keywords:	barium compounds;Cooper pairs;critical currents; ferromagnetic materials;high-temperature superconductors; interface magnetism;lanthanum compounds;magnetic anisotropy;magnetic susceptibility; strontium compounds;superconducting thin films;yttrium compounds
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	22 Jun 2011 09:16
Last Modified:	22 Jun 2011 09:16
URI:	http://eprints.iisc.ac.in/id/eprint/38418

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