Formation of MnAs Dots on S-Passivated GaAs(100) Substrates

K. Ono; M. Mizuguchi; T. Uragami; T. Mano; H. Fujioka; M. Oshima; M. Tanaka; Y. Watanabe

doi:10.3379/jmsjmag.23.691

Chapter 9. Novel Magnetic Phenomena

Formation of MnAs Dots on S-Passivated GaAs(100) Substrates

K. Ono, M. Mizuguchi, T. Uragami, T. Mano, H. Fujioka, M. Oshima, M. Tanaka, Y. Watanabe

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Keywords: nanomagnet, molecular beam epitaxy, S-passivation, MnAs, nano-particle

JOURNAL OPEN ACCESS

1999 Volume 23 Issue 1_2 Pages 691-693

DOI https://doi.org/10.3379/jmsjmag.23.691

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Abstract

We report the formation of nanosize ferromagnetic MnAs dots on S-passivated GaAs by molecular beam epitaxy. The structural and magnetic properties of the dots have been characterized by high resolution scanning electron microscopy, and superconducting quantum interference device magnetometer. The average size and the density of these MnAs dots were 16.3nm and 2.3×10¹⁰/cm³ respectively. These dots show ferromagnetism at low temperature and the Curie temperature is lower than the bulk value.

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