Superferromagnetism in dipolarly coupled L 10 FePt nanodots with perpendicular magnetization

S. Bedanta, Takeshi Seki, H. Iwama, T. Shima, Koki Takanashi

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11 Citations (Scopus)

Abstract

The magnetization reversal for perpendicularly magnetized L10-FePt (001) nanodots with different interdot distances was studied by magnetic domain observation. We show the results for two kinds of dot arrays: (i) the dots with physical percolation leading to direct exchange coupling, and (ii) the dots which are fully isolated experiencing only dipolar interaction. For the physically percolated dot array, ferromagnetic domains were observed in which domain expanded with magnetic field. On the other hand, the array with the isolated FePt dots also exhibited domain like features resembling to the percolated dots, indicating the existence of superferromagnetism in the array of FePt nanodots.

Original languageEnglish
Article number152410
JournalApplied Physics Letters
Volume107
Issue number15
DOIs
Publication statusPublished - 2015 Oct 12

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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