Magnetic nanodot arrays produced by direct laser interference lithography

M. Zheng, M. Yu, Y. Liu, R. Skomski, Sy-Hwang Liou, David J Sellmyer, V. N. Petryakov, Yu K. Verevkin, N. I. Polushkin, N. N. Salashchenko

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Abstract

Periodic magnetic nanodot arrays have been produced on an area as large as 1 cm X 1 cm by direct nanolithography using interferometric laser radiation. The dots are formed by the local annealing of sputtered amorphous Co-C films in regions where the laser intensity is highest. At room temperature the dots exhibit ferromagnetic order and are embedded in a paramagnetic matrix. The onset of room-temperature ferromagnetism is caused by nanoscale chemical and morphological changes during dot formation and reflects the phase separation of magnetic Co-rich clusters. The present single-step nanolithography is potentially an efficient method for fabrication of patterned magnetic arrays.

Original languageEnglish (US)
Pages (from-to)2606-2608
Number of pages3
JournalApplied Physics Letters
Volume79
Issue number16
DOIs
Publication statusPublished - Oct 15 2001

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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