Study of ferromagnetism–superconductivity interactions in Co/Nb multilayers |
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| Authors: | Wen.-C. Chiang J.G. Lin K.H. Hsu D.S. Hussey D.V. Baxter |
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| Affiliation: | 1. Department of Physics, Chinese Culture University, Taipei 111, Taiwan;2. Center for Condensed Matter Sciences, National Taiwan University, Taipei 106, Taiwan;3. Department of Physics, Indiana University, Bloomington, IN 47405, USA |
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| Abstract: | We investigate Co/Nb multilayers to explore the spontaneous π-phase shift between the superconducting (SC) layers, which is attributed for causing the non-monotonic change of the SC transition temperature (Tc) with the ferromagnetic (FM) layer thickness (tFM) in several FM/SC multilayered systems. The issue of interfacial roughness is also explored by growing Co/Nb multilayers at various sputtering pressures. Transport measurements show a non-monotonic dependence of Tc on tFM, and this dependence is insensitive to the structural variation present in the samples, as measured by X-ray scattering. |
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| Keywords: | 74.62.&minus c 68.65.ac |
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