Enhancement of the superconducting transition temperature by an external magnetic field parallel to the plane of La0.7Sr0.3MnO3/YBa2Cu3O7/La0.7Sr0.3MnO3 trilayers

K. Dybko; K. Werner-Malento; M. Sawicki; P. Przyslupski

doi:10.1209/0295-5075/85/57010

All issues

Volume 85 / No 5 (March 2009)

EPL, 85 5 (2009) 57010

Abstract

Issue		EPL Volume 85, Number 5, March 2009


Article Number		57010
Number of page(s)		4
Section		Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
DOI		https://doi.org/10.1209/0295-5075/85/57010
Published online		20 March 2009

EPL, 85 (2009) 57010

Enhancement of the superconducting transition temperature by an external magnetic field parallel to the plane of La_0.7Sr_0.3MnO₃/YBa₂Cu₃O₇/La_0.7Sr_0.3MnO₃ trilayers

K. Dybko, K. Werner-Malento, M. Sawicki and P. Przyslupski

Institute of Physics, Polish Academy of Sciences - Al. Lotników 32/46, 02-668 Warsaw, Poland, EU

Corresponding author: dybko@ifpan.edu.pl

Received: 24 November 2008
Accepted: 15 February 2009

Abstract

We investigate the superconducting transition temperature of epitaxial La_0.7Sr_0.3MnO₃/YBa₂Cu₃O₇/La_0.7Sr_0.3MnO₃ (LSMO/YBCO/LSMO) trilayers as a function of the magnetic field parallel to the layer structure. In these structures, the magnetic moment of the half-metallic ferromagnet LSMO is parallel to the plane of the film. The coercivity- and saturation field of the top and bottom LSMO layer could be independently tuned by adjusting their thickness. The application of a magnetic field increased the superconducting transition temperature by about 1.6 K with respect to the demagnetized state of the LSMO. Three possible mechanisms of the enhancement are considered. These are the stray fields due to domain walls, spin polarization of the current, and the formation of an odd triplet superconducting state.

PACS: 74.78.Fk – Multilayers, superlattices, heterostructures / 74.62.-c – Transition temperature variations / 85.75.-d – Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields

© EPLA, 2009

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.