CoPt/TiN films nanopatterned by RF plasma etching towards dot-patterned magnetic media

János Szívós, Szilárd Pothorszky, Jan Soltys, Miklós Serényi, Hongyu An, Tenghua Gao, András Deák, Ji Shi, György Sáfrán

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

CoPt thin films as possible candidates for Bit Patterned magnetic Media (BPM) were prepared and investigated by electron microscopy techniques and magnetic measurements. The structure and morphology of the Direct Current (DC) sputtered films with N incorporation were revealed in both as-prepared and annealed state. Nanopatterning of the samples was carried out by means of Radio Frequency (RF) plasma etching through a Langmuir-Blodgett film of silica nanospheres that is a fast and high throughput technique. As a result, the samples with hexagonally arranged 100 nm size separated dots of fct-phase CoPt were obtained. The influence of the order of nanopatterning and anneling on the nanostructure formation was revealed. The magnetic properties of the nanopatterned fct CoPt films were investigated by Vibrating Sample Magnetometer (VSM) and Magnetic Force Microscopy (MFM). The results show that CoPt thin film nanopatterned by means of the RF plasma etching technique is promising candidate to a possible realization of BPM. Furthermore, this technique is versatile and suitable for scaling up to technological and industrial applications.

Original languageEnglish
Pages (from-to)31-38
Number of pages8
JournalApplied Surface Science
Volume435
DOIs
Publication statusPublished - 2018 Mar 30
Externally publishedYes

Keywords

  • Ferromagnetic thin films
  • Langmuir-Blodgett film
  • Nanopatterning
  • Ordered nanostructures
  • RF plasma etching

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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  • Cite this

    Szívós, J., Pothorszky, S., Soltys, J., Serényi, M., An, H., Gao, T., Deák, A., Shi, J., & Sáfrán, G. (2018). CoPt/TiN films nanopatterned by RF plasma etching towards dot-patterned magnetic media. Applied Surface Science, 435, 31-38. https://doi.org/10.1016/j.apsusc.2017.11.062