Three dimensional nano-seeding assembly of ferromagnetic Fe/LaSrFeO 4 nano-hetero dot array

K. Okada, T. Sakamoto, K. Fujiwara, A. N. Hattori, T. Kanki, H. Tanaka

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

Well-ordered ferromagnetic Fe nanodots/LaSrFeO 4 nanocomposites have been fabricated by self-assembled crystal growth on La-SrTiO 3 substrates having Fe nanoseed array fabricated by nanoimprint lithography (NIL). The Fe nanoseeds with spacing of 200 nm make possible the formation of perfectly arranged Fe/LaSrFeO 4 nanocomposites; phase-separated Fe nanodots and the LaSrFeO 4 matrix grew only on the nanoseeds and on the area except nanoseeds, respectively. A calculation based on a surface diffusion model has indicated that the nanoseed spacing required for the formation of the perfectly arranged nanocomposite is less than 400 nm. Magnetic force microscopy revealed an arrangement of isolated ferromagnetic domain corresponding to Fe nanodots grown on the Fe nanoseeds. The combination of self-assembled growth and NIL gives a route of the rational formation of high-density ferromagnetic memory devices.

Original languageEnglish
Article number024320
JournalJournal of Applied Physics
Volume112
Issue number2
DOIs
Publication statusPublished - 2012 Jul 15
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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