Origin of ferromagnetism of MnSi1.7 nanoparticles in Si: First-principles calculations

Shin Yabuuchi; Hiroyuki Kageshima; Yukinori Ono; Masao Nagase; Akira Fujiwara; Eiji Ohta

doi:10.1103/PhysRevB.78.045307

Origin of ferromagnetism of MnSi1.7 nanoparticles in Si: First-principles calculations

Shin Yabuuchi, Hiroyuki Kageshima, Yukinori Ono, Masao Nagase, Akira Fujiwara, Eiji Ohta

Research output: Contribution to journal › Article › peer-review

24 Citations (Scopus)

Abstract

The origin of the magnetism of MnSi1.7 nanoparticles in Si is investigated using the first-principles calculations: bulk and interface effects are considered. The bulk magnetic property is expected to be affected by stoichiometry, strain, and charge accumulation. Stoichiometry and charge accumulation induce a ferromagnetic state, and strain stabilizes the ferromagnetic state. Another factor, the MnSi1.7 /Si interface formation, is seen as triggering ferromagnetism strongly localized at the interface. These two mechanisms are shown to be related to the experimentally determined hard and soft components, respectively.

Original language	English
Article number	045307
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	78
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevB.78.045307
Publication status	Published - 2008 Jul 11
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.78.045307

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abstract = "The origin of the magnetism of MnSi1.7 nanoparticles in Si is investigated using the first-principles calculations: bulk and interface effects are considered. The bulk magnetic property is expected to be affected by stoichiometry, strain, and charge accumulation. Stoichiometry and charge accumulation induce a ferromagnetic state, and strain stabilizes the ferromagnetic state. Another factor, the MnSi1.7 /Si interface formation, is seen as triggering ferromagnetism strongly localized at the interface. These two mechanisms are shown to be related to the experimentally determined hard and soft components, respectively.",

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AU - Nagase, Masao

AU - Fujiwara, Akira

AU - Ohta, Eiji

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Origin of ferromagnetism of MnSi1.7 nanoparticles in Si: First-principles calculations

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