Magnetic silicon nanoparticles

Priyanka Manchanda; Pankaj Kumar; Balamurugan Balasubramanian; Pinaki Mukherjee; Arti Kashyap; David J. Sellmyer; Ralph Skomski

doi:10.1109/TMAG.2014.2325792

Magnetic silicon nanoparticles

Priyanka Manchanda, Pankaj Kumar, Balamurugan Balasubramanian, Pinaki Mukherjee, Arti Kashyap, David J. Sellmyer, Ralph Skomski

Physics and Astronomy

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

4 Scopus citations

Abstract

Prospects for diamond-structured magnetic Si are investigated experimentally, by model calculations, and numerically. Our theoretical analysis, using bond-orbital, Vienna ab-initio simulation package, and SIESTA calculations, suggest that some diamond-Si imperfection may carry a magnetic moment. In particular, for tetrahedral Si₅ clusters, we calculate a magnetic moment of 4 μ_B per cluster. These moments are more likely to be observed in nanoparticles, as compared with thin films, due to the larger surface-to-volume ratios of the former and to their more versatile atomic surface structure. Experimentally, we have prepared Si nanoparticles by cluster deposition and found a small magnetization, of 2.9 emu/cm³ at 10 K.

Original language	English (US)
Article number	6971444
Journal	IEEE Transactions on Magnetics
Volume	50
Issue number	11
DOIs	https://doi.org/10.1109/TMAG.2014.2325792
State	Published - Nov 1 2014

Keywords

Exchange
impurity magnetism
local magnetic moments
magnetic nanoparticles

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/TMAG.2014.2325792

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title = "Magnetic silicon nanoparticles",

abstract = "Prospects for diamond-structured magnetic Si are investigated experimentally, by model calculations, and numerically. Our theoretical analysis, using bond-orbital, Vienna ab-initio simulation package, and SIESTA calculations, suggest that some diamond-Si imperfection may carry a magnetic moment. In particular, for tetrahedral Si5 clusters, we calculate a magnetic moment of 4 μB per cluster. These moments are more likely to be observed in nanoparticles, as compared with thin films, due to the larger surface-to-volume ratios of the former and to their more versatile atomic surface structure. Experimentally, we have prepared Si nanoparticles by cluster deposition and found a small magnetization, of 2.9 emu/cm3 at 10 K.",

keywords = "Exchange, impurity magnetism, local magnetic moments, magnetic nanoparticles",

author = "Priyanka Manchanda and Pankaj Kumar and Balamurugan Balasubramanian and Pinaki Mukherjee and Arti Kashyap and Sellmyer, {David J.} and Ralph Skomski",

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T1 - Magnetic silicon nanoparticles

AU - Manchanda, Priyanka

AU - Kumar, Pankaj

AU - Balasubramanian, Balamurugan

AU - Mukherjee, Pinaki

AU - Kashyap, Arti

AU - Sellmyer, David J.

AU - Skomski, Ralph

PY - 2014/11/1

Y1 - 2014/11/1

N2 - Prospects for diamond-structured magnetic Si are investigated experimentally, by model calculations, and numerically. Our theoretical analysis, using bond-orbital, Vienna ab-initio simulation package, and SIESTA calculations, suggest that some diamond-Si imperfection may carry a magnetic moment. In particular, for tetrahedral Si5 clusters, we calculate a magnetic moment of 4 μB per cluster. These moments are more likely to be observed in nanoparticles, as compared with thin films, due to the larger surface-to-volume ratios of the former and to their more versatile atomic surface structure. Experimentally, we have prepared Si nanoparticles by cluster deposition and found a small magnetization, of 2.9 emu/cm3 at 10 K.

AB - Prospects for diamond-structured magnetic Si are investigated experimentally, by model calculations, and numerically. Our theoretical analysis, using bond-orbital, Vienna ab-initio simulation package, and SIESTA calculations, suggest that some diamond-Si imperfection may carry a magnetic moment. In particular, for tetrahedral Si5 clusters, we calculate a magnetic moment of 4 μB per cluster. These moments are more likely to be observed in nanoparticles, as compared with thin films, due to the larger surface-to-volume ratios of the former and to their more versatile atomic surface structure. Experimentally, we have prepared Si nanoparticles by cluster deposition and found a small magnetization, of 2.9 emu/cm3 at 10 K.

KW - Exchange

KW - impurity magnetism

KW - local magnetic moments

KW - magnetic nanoparticles

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Magnetic silicon nanoparticles

Abstract

Keywords

ASJC Scopus subject areas

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