Inverse proximity effect in superconductor-ferromagnet bilayer structures

Jing Xia, V. Shelukhin, M. Karpovski, A. Kapitulnik, A. Palevski

Research output: Contribution to journalArticlepeer-review

Abstract

Measurements of the polar Kerr effect using a zero-area-loop Sagnac magnetometer on Pb/Ni and Al/(Co-Pd) proximity-effect bilayers show unambiguous evidence for the "inverse proximity effect," in which the ferromagnet induces a finite magnetization in the superconducting layer. To avoid probing the magnetic effects in the ferromagnet, the superconducting layer was prepared much thicker than the light's optical-penetration depth. The sign and size of the effect, as well as its temperature dependence agree with recent predictions by Bergeret et al. [Phys. Rev. BPRBMDO0163-1829 69, 174504 (2004)]10.1103/ PhysRevB.69.174504.

Original languageEnglish
Article number087004
JournalPhysical Review Letters
Volume102
Issue number8
DOIs
StatePublished - 23 Feb 2009

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