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Title: Effect of injected spins with different polarized orientations on the superconductivity of La{sub 0.7}Sr{sub 0.3}MnO{sub 3}/La{sub 1.85}Sr{sub 0.15}CuO{sub 4} thin films

The influence of spin-polarized quasi-particle injection on the superconductivity of epitaxial La{sub 0.7}Sr{sub 0.3}MnO{sub 3}/La{sub 1.85}Sr{sub 0.15}CuO{sub 4} composite thin films is systematically investigated. Different electrode configurations on the same specimen are designed to study the role of spin injection. It is found that the upper critical field and flux pinning potential are reduced by the spin injection, especially for the field parallel to ab-plane. The manipulation of superconductivity by the spin polarization orientations of injected quasi-particles possibly originates from the different suppressions on the superconducting pairing strength, which is considered to be related to the local antiferromagnetic spin fluctuations in La{sub 1.85}Sr{sub 0.15}CuO{sub 4}.
Authors:
; ; ; ; ;  [1] ;  [2]
  1. Hefei National Laboratory for Physical Sciences at Microscale, Department of Physics, University of Science and Technology of China, Hefei 230026 (China)
  2. Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031 (China)
Publication Date:
OSTI Identifier:
22254143
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 19; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANTIFERROMAGNETISM; EPITAXY; LANTHANUM COMPOUNDS; QUASI PARTICLES; SPIN; SPIN ORIENTATION; STRONTIUM COMPOUNDS; SUPERCONDUCTIVITY; THIN FILMS