TY - JOUR
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
N1 - Publisher Copyright:
© 2014 IEEE.
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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U2 - 10.1109/TMAG.2014.2325792
DO - 10.1109/TMAG.2014.2325792
M3 - Article
AN - SCOPUS:84915820350
SN - 0018-9464
VL - 50
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
IS - 11
M1 - 6971444
ER -