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Coercivity dependence on periodicity of Co and Py antidot arrays

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Abstract

An experimental study on the control of thin films magnetic coercivity through the change in geometry of antidot arrays has been performed on two different materials: cobalt and permalloy. Antidot arrays have been fabricated using a Focused Ion Beam, and magnetic hysteresis loops have been measured using Kerr effect microscopy. The coercivity dependence on the material and the array periodicity have been studied. A novel method to estimate the antidot diameter from MOKE data is presented. Results suggest a widening of the antidot effective diameter compared to the one measured from SEM images. This could be attributed to a damage of the magnetic material around the holes during the fabrication process, which leads to amorphization and concomitant reduction of the surrounding film magnetization.

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Authors and Affiliations

  1. Instituto de Ciencia de Materiales de Aragón (ICMA) and Departamento de Física de la Materia Condensada, Consejo Superior de Investigaciones Científicas — Universidad de Zaragoza, Zaragoza, Spain

    Celia Castán-Guerrero, Juan Bartolomé, Fernando Bartolomé & Luis Miguel García

  2. Instituto de Nanociencia de Aragón and Departamento de Física de la Materia Condensada, Universidad de Zaragoza, Zaragoza, Spain

    Javier Sesé & Pavel Strichovanec

  3. Centro Universitario de la Defensa, Ctra. de Huesca s/n., 50090, Zaragoza, Spain

    Julia Herrero-Albillos

  4. Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas, Madrid, Spain

    Karla J. Merazzo & Manuel Vázquez

  5. CIC nanoGUNE Consolider, IKERBASKE, Donostia — San Sebastian, Spain

    Paolo Vavassori

Authors
  1. Celia Castán-Guerrero
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  2. Juan Bartolomé
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  3. Fernando Bartolomé
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  4. Luis Miguel García
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  5. Javier Sesé
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  6. Pavel Strichovanec
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  7. Julia Herrero-Albillos
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  8. Karla J. Merazzo
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  9. Manuel Vázquez
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  10. Paolo Vavassori
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Correspondence to Celia Castán-Guerrero.

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Castán-Guerrero, C., Bartolomé, J., Bartolomé, F. et al. Coercivity dependence on periodicity of Co and Py antidot arrays. Journal of the Korean Physical Society 62, 1521–1524 (2013). https://doi.org/10.3938/jkps.62.1521

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  • DOI: https://doi.org/10.3938/jkps.62.1521

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