Critical current suppression in a superconductor by injection of spin-polarized carriers from a ferromagnet

V. A. Vas'ko, V. A. Larkin, P. A. Kraus, K. R. Nikolaev, D. E. Grupp, C. A. Nordman, Allen M Goldman

Research output: Contribution to journalArticlepeer-review

267 Scopus citations

Abstract

The critical current of a thin film of the high-Tcsuperconductor DyBa2Cu3O7, when incorporated in a heterostructure in which it is separated from a ferromagnetic underlayer of La2/3Sr1/3MnO3by an undoped ultrathin La2CuO4film, has been found to be strongly suppressed by current flowing in the ferromagnetic film. A control experiment with a Au film replacing the ferromagnet did not show such a response, and resistive heating was ruled out by additional measurements. The effect would appear to be caused by pair breaking associated with spin-polarized carriers being injected into the superconductor.

Original languageEnglish (US)
Pages (from-to)1134-1137
Number of pages4
JournalPhysical Review Letters
Volume78
Issue number6
DOIs
StatePublished - Feb 10 1997

Fingerprint Dive into the research topics of 'Critical current suppression in a superconductor by injection of spin-polarized carriers from a ferromagnet'. Together they form a unique fingerprint.

Cite this