Ferromagnetic/superconducting bilayer structure: A model system for spin diffusion length estimation
S. Soltan, J. Albrecht, H.-U. Habermeier
DOI 10.1103/PhysRevB.70.144517 · Physical Review B
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Abstract
We report detailed studies on ferromagnet-superconductor bilayer structures. Epitaxial bilayer structures of half metal-colossal magnetoresistive (HMCMR) La2∕3Ca1∕3MnO3 and high-Tc superconducting (HTSC) YBa2Cu3O7−δ 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 ξFM is found to be in the range of ξFM≈10nm.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 23 | Pressure not reported | onset |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 76 | Pressure not reported | onset |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 85 | Pressure not reported | onset |
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