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

Article

关键词: SUPERCONDUCTING TRANSITION-TEMPERATURE;    CUPRATE/MANGANITE HETEROSTRUCTURES;    POINT-CONTACT;    SUPERLATTICES;    NONEQUILIBRIUM;    POLARIZATION;    SUPPRESSION;    INJECTION;    STATE;    CONDUCTIVITY;   

DOI  :  10.1103/PhysRevB.70.144517

来源: SCIE

【 摘 要 】

We report detailed studies on ferromagnet-superconductor bilayer structures. Epitaxial bilayer structures of half metal-colossal magnetoresistive (HMCMR) La2/3Ca1/3MnO3 and high-T-c superconducting (HTSC) YBa2Cu3O7-delta are grown on SrTiO3 (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 xi(FM) is found to be in the range of xi(FM)approximate to10 nm.

【 授权许可】

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