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Title: Effect of injected spins with different polarized orientations on the vortex phase transition in La{sub 0.7}Sr{sub 0.3}MnO{sub 3}/La{sub 1.85}Sr{sub 0.15}CuO{sub 4} heterostructure

The current-voltage (I-V) characteristics with spin injection were investigated for the epitaxial La{sub 0.7}Sr{sub 0.3}MnO{sub 3}/La{sub 1.85}Sr{sub 0.15}CuO{sub 4} heterostructure rotated from H//c to H//ab in magnetic fields up to 14‚ÄČT. It is found that all the I-V curves in various magnetic fields can be scaled with a three dimensional (3D) vortex glass model, and the spin injection can induce a better 3D scaling behavior, which is closely related to the decrease of the anisotropy parameter. A vortex phase diagram for the evolution of vortex glass transition field (H{sub g}) and upper critical field (H{sub c2}) indicates that both H{sub g} and H{sub c2} are suppressed by spin injection, and this effect becomes more obvious in the case of H//ab, which probably originates from the different suppression on the superconducting pairing strength by different injected spins' orientations.
Authors:
; ; ;  [1] ;  [2] ;  [1] ;  [3]
  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)
  3. (China)
Publication Date:
OSTI Identifier:
22410133
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 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; CRITICAL FIELD; CUPRATES; ELECTRIC CONDUCTIVITY; EPITAXY; HETEROJUNCTIONS; INTERFACES; LANTHANUM COMPOUNDS; MANGANATES; PHASE DIAGRAMS; PHASE TRANSFORMATIONS; SPIN; SPIN ORIENTATION; STRONTIUM COMPOUNDS; THREE-DIMENSIONAL LATTICES; VORTICES