Pseudo spin-valve behavior in oxide ferromagnet/superconductor/ferromagnet trilayers

BSH Pang*, C Bell, RI Tomov, JH Durrell, MG Blamire, Chris Bell

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

8 Citations (Scopus)

Abstract

La0.7Ca0.3MnO3[YBa2Cu3O7-delta/La0.67Sr0.33MnO3 heterostructural devices with double coercivity have been fabricated. The superconducting critical current (I-c) and critical temperature in both parallel (P) and antiparallel (AP) magnetic configurations remained unchanged within our measurement limits. This observation is contrary to results obtained elsewhere using similar metallic systems. A pseudo spin-valve magnetoresistive (MR) characteristic was observed at bias current (I-bias) similar to I-c at temperatures below the onset of superconductivity. The effect increased with decreasing temperature and Ibias and can be explained using the assumption of the electron spin-charge separation. (c) 2005 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)313-319
Number of pages7
JournalPhysics Letters A
Volume341
Issue number1-4
DOIs
Publication statusPublished - 20 Jun 2005

Keywords

  • spin valve
  • giant magnetoresistance
  • ferromagnetism
  • superconductivity
  • SUPERCONDUCTOR
  • FERROMAGNET
  • HETEROSTRUCTURES
  • INJECTION
  • FILMS
  • MAGNETORESISTANCE
  • SUPERLATTICES
  • MULTILAYERS
  • MAGNETISM
  • CURRENTS

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