Spin injection into YBa₂Cu₃0₇ films

Pavlo Mikheenko, MD Allsworth, Radoslav Chakalov, Mark Colclough, K Kawano, Christopher Muirhead

Research output: Contribution to journalArticle


We report a range of experiments designed to test the efficacy of spin polarized injection from colossal magnetoresistive material (CMR) into high temperature superconductors (HTS). These include traditional transport measurements, studies of CMR/YBCO contacts, measurements of penetration depth and studies of the effect of spin-injection on the critical state of square thin films and rings. We have used pulsed currents to minimize heating and have made comparisons with the non-magnetic homologue of CMR LaNiO3. Our experiments provide evidence that there is a measurable effect, but that it is small and mainly confined to 10-20 nm of the YBCO surface. Current gain of about 0.2 has been observed.
Original languageEnglish
Pages (from-to)491-504
Number of pages14
JournalModern Physics Letters B
Publication statusPublished - 1 May 2003


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