Search for spin-polarization effects in La0.7Mn0.3Ca3O3/YBa2Cu3O7-delta thin-film bilayers

X Deng, M Joshi, R Chakalova, Mark Colclough, R Palai, Yau Tse, Ian Jones, H Huhtinen, Christopher Muirhead

Research output: Contribution to journalArticle

5 Citations (Scopus)


We describe a search for the effects of spin-polarized electrons in thin-film bilayers consisting of the high temperature superconductor YBa2Cu3O7-delta and the colossal magnetoresistive material La0.7Ca0.3MnO3 by using penetration depth and critical current measurements. The work differs from that described in other works in that the YBa2Cu3O7-delta is grown with its c-axis lying in the plane of the thin film in order to investigate the effects of proximity suppression and also the injection of a spin-polarized current along the a/b-planes of the YBa2Cu3O7-delta. We see a number of effects including field dependence of the average penetration depth and apparent suppression of the critical current by an injected current, with a gain greater than unity, but we argue that these are explicable in terms of a combination of heating and current summation, without any need to invoke the spin-polarization of the injected current.
Original languageEnglish
JournalPhysical Review B
Issue number14
Publication statusPublished - 1 Jan 2008


Dive into the research topics of 'Search for spin-polarization effects in La0.7Mn0.3Ca3O3/YBa2Cu3O7-delta thin-film bilayers'. Together they form a unique fingerprint.

Cite this