Properties of superconductor-ferromagnet bilayers: YBa2CuO3-Fe and YBa2CuO3-Permalloy
Mark Rubinstein, P. Lubitz, W. E. Carlos, P. R. Broussard, D. B. Chrisey, J. Horwitz, J. J. Krebs
DOI 10.1103/PhysRevB.47.15350 · Physical Review B
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Abstract
The superconducting and magnetic properties of thin films of ferromagnetic iron and Permalloy deposited on thin films of YBa2Cu3O7−δ have been investigated. The ferromagnetic films were 50–300 Å thick, while the superconducting films were 1000–2000 Å thick. The superconducting properties of the films were not affected by the presence of the magnetic layers, but marked changes in the ferromagnetic resonance spectra of the iron and Permalloy films were observed, including the appearance of a large and temperature-dependent magnetic anisotropy. These effects are attributed to the development of a spin-glass-like phase at the superconductor-ferromagnet interface which is coupled to the bulk of the ferromagnet.
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. | 89 | Pressure not reported | onset |
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