Controlling the magnetic structure of Co/Pd thin films by direct laser interference patterning

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Nanotechnology. 2015, 26(20), 205302. ISSN 0957-4484. eISSN 1361-6528. Available under: doi: 10.1088/0957-4484/26/20/205302
Zusammenfassung

Nanosecond pulsed two-beam laser interference is used to generate two-dimensional temperature patterns on a magnetic thin film sample. We show that the original domain structure of a [Co/Pd] multilayer thin film changes drastically upon exceeding the Curie temperature by thermal demagnetization. At even higher temperatures the multilayer system is irreversibly changed. In this area no out-of-plane magnetization can be found before and after a subsequent ac-demagnetization. These findings are supported by numerical simulations using the Landau–Lifshitz–Bloch formalism which shows the importance of defect sites and anisotropy changes to model the experiments. Thus, a one-dimensional temperature pattern can be transferred into a magnetic stripe pattern. In this way one can produce magnetic nanowire arrays with lateral dimensions of the order of 100 nm. Typical patterned areas are in the range of several square millimeters. Hence, the parallel direct laser interference patterning method of magnetic thin films is an attractive alternative to the conventional serial electron beam writing of magnetic nanostructures.

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ISO 690STÄRK, Martin, Frank SCHLICKEISER, Dennis NISSEN, Birgit HEBLER, Philipp GRAUS, Denise HINZKE, Elke SCHEER, Paul LEIDERER, Mikhail FONIN, Manfred ALBRECHT, Ulrich NOWAK, Johannes BONEBERG, 2015. Controlling the magnetic structure of Co/Pd thin films by direct laser interference patterning. In: Nanotechnology. 2015, 26(20), 205302. ISSN 0957-4484. eISSN 1361-6528. Available under: doi: 10.1088/0957-4484/26/20/205302
BibTex
@article{Stark2015Contr-31358,
  year={2015},
  doi={10.1088/0957-4484/26/20/205302},
  title={Controlling the magnetic structure of Co/Pd thin films by direct laser interference patterning},
  number={20},
  volume={26},
  issn={0957-4484},
  journal={Nanotechnology},
  author={Stärk, Martin and Schlickeiser, Frank and Nissen, Dennis and Hebler, Birgit and Graus, Philipp and Hinzke, Denise and Scheer, Elke and Leiderer, Paul and Fonin, Mikhail and Albrecht, Manfred and Nowak, Ulrich and Boneberg, Johannes},
  note={Article Number: 205302}
}
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