Ferromagnetic/superconducting bilayer structure: A model system for spin diffusion length estimation

2004/08/23 by S. Soltan, J. Albrecht, H.‐U. Habermeier +1 · 1 citation
Materials Science · Physics and Astronomy · #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #cond-mat.supr-con #physics.class-ph

paper · pdf · doi:10.1103/physrevb.70.144517

6 pages, 7 figures, Accepted for publication in Phys. Rev. B

arxiv created 2004/08/23 · openalex publication_date 2004/10/22 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We report detailed studies on ferromagnet-superconductor bilayer structures. Epitaxial bilayer structures of half metal-colossal magnetoresistive (HMCMR) La_2∕3Ca_1∕3MnO₃ and high-T_c superconducting (HTSC) YBa₂Cu₃O_7\ensuremath-\ensuremathδ are grown on SrTiO₃\phantom\rule0.3em0ex(100) single-crystalline substrates using pulsed laser deposition. Magnetization M(T) measurements show the coexistence of ferromagnetism and superconductivity in these structures at low temperatures. Using the HMCMR layer as an electrode for spin polarized electrons, we discuss the role of spin polarized self injection into the HTSC layer. The experimental results are in good agreement with a presented theoretical estimation, where the spin diffusion length \ensuremathξ_FM is found to be in the range of \ensuremathξ_FM\ensuremath≈10\phantom\rule0.3em0exnm.

Citations

• Suppression of superconductivity in YBCO/LCMO superlattices

Cited by

• Spin-polarized quasiparticle injection effects in YBCO thin films