Long range spin supercurrents in ferromagnetic CrO2 using a multilayer contact structure

M.S. Anwar, M. Veldhorst, Alexander Brinkman, J. Aarts

Research output: Contribution to journalArticleAcademicpeer-review

59 Citations (Scopus)
1 Downloads (Pure)

Abstract

We report measurements of long ranged supercurrents through ferromagnetic and fully spin-polarized CrO2 deposited on TiO2 substrates. In earlier work, we found supercurrents in films grown on sapphire but not on TiO2. Here, we employed a special contact arrangement, consisting of a Ni/Cu sandwich between the film and the superconducting amorphous Mo70Ge30 electrodes. The distance between the contacts was almost a micrometer, and we find the critical current density to be significantly higher than found in the films deposited on sapphire. We argue this is due to spin mixing in the Ni/Cu/CrO2 layer structure, which is helpful in the generation of the odd-frequency spin triplet correlations needed to carry the supercurrent.
Original languageEnglish
Article number052602
Pages (from-to)052602-
Number of pages3
JournalApplied physics letters
Volume100
Issue number5
DOIs
Publication statusPublished - 2012

Keywords

  • METIS-286922
  • IR-84690

Fingerprint Dive into the research topics of 'Long range spin supercurrents in ferromagnetic CrO2 using a multilayer contact structure'. Together they form a unique fingerprint.

  • Cite this