Tuning magnetic properties by roll-up of Au/Co/Au films into microtubes
| C. Müller, M. S. Khatri, Ch. Deneke, S. Fähler, Y. F. Mei, E. Bermúdez Ureña, O. G. Schmidt Appl. Phys. Lett. 94, 102510 (2009) URL PDF |
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| Abstract | ||
| Au/Co/Au trilayers are fabricated by tilted deposition on prestructured polymer sacrificial layers. The metal trilayers are released by selectively dissolving the sacrificial layer and roll-up into microtubes. Magnetization properties are strongly affected by the roll-up process. In addition to a modified shape anisotropy, the magnetostrictive anisotropy due to the anisotropic stress release is reversed. Low temperature measurements support the presence of significant exchange bias in these rolled-up structures. |