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Nanocap arrays of granular CoCrPt:SiO2 films on silica particles : tailoring of the magnetic properties by Co+ irradiation

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2010

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Krone, Philipp
Brombacher, Christoph
Lenz, Kilian
Ball, David
Rohrmann, Hartmut
Fassbender, Jürgen
Albrecht, Manfred

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https://doi.org/10.1088/0957-4484/21/38/385703
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Nanotechnology. Institute of Physics Publishing (IOP). 2010, 21(38), 385703. ISSN 0957-4484. eISSN 1361-6528. Available under: doi: 10.1088/0957-4484/21/38/385703

Zusammenfassung

An approach for tailoring the magnetic properties by ion irradiation of granular perpendicular CoCrPt:SiO2 films grown on silica particles with sizes down to 10 nm was investigated. The as-prepared samples reveal an intriguing scaling dependence of the coercive field and remnant magnetization: both parameters are found to decrease with decreasing particle size. However, Co+ irradiation at a low fluence of 0.5 × 1014 cm−2 already results in an opposite scaling behavior. It is assumed that this modification is due to the enhancement of the intergranular magnetic exchange coupling of the granular CoCrPt:SiO2 film initiated by Co+ irradiation resulting in a modified reversal behavior. Further increase of the irradiation fluence beyond 1.6 × 1014 ions cm-2 leads to a degradation of the magnetic layer properties, lowering the remnant magnetization and the coercive field in the easy-axis direction. Moreover, the local magnetic properties of the samples were analyzed by magnetic force microscopy revealing magnetic multi-domain cap structures.

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ISO 690KRONE, Philipp, Christoph BROMBACHER, Denis MAKAROV, Kilian LENZ, David BALL, Felix SPRINGER, Hartmut ROHRMANN, Jürgen FASSBENDER, Manfred ALBRECHT, 2010. Nanocap arrays of granular CoCrPt:SiO2 films on silica particles : tailoring of the magnetic properties by Co+ irradiation. In: Nanotechnology. Institute of Physics Publishing (IOP). 2010, 21(38), 385703. ISSN 0957-4484. eISSN 1361-6528. Available under: doi: 10.1088/0957-4484/21/38/385703
BibTex
@article{Krone2010-09-24Nanoc-53061,
  year={2010},
  doi={10.1088/0957-4484/21/38/385703},
  title={Nanocap arrays of granular CoCrPt:SiO<sub>2</sub> films on silica particles : tailoring of the magnetic properties by Co<sup>+</sup> irradiation},
  number={38},
  volume={21},
  issn={0957-4484},
  journal={Nanotechnology},
  author={Krone, Philipp and Brombacher, Christoph and Makarov, Denis and Lenz, Kilian and Ball, David and Springer, Felix and Rohrmann, Hartmut and Fassbender, Jürgen and Albrecht, Manfred},
  note={Article Number: 385703}
}
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