Magnetic properties of transition metal atoms doped in silicon nanotubes with hexagonal prism structure

Title
Magnetic properties of transition metal atoms doped in silicon nanotubes with hexagonal prism structure
Authors
Jo, C.; Lee, J.I.
Keywords
binding energy, binding energy, magnetic moment, silicon nanotube
Issue Date
2005-10
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Abstract
Magnetic properties of magnetic transition metals doped in the infinite Si nanotubes (SiNTs) with hexagonal prism structure (Si12Mn, M = Fe, Co, Ni, n = 1, 2) have been investigated for two different numbers of dopants per hexagonal prism by using the localized basis calculational method. The decrease (increase) of spin-down (spin-up) electrons for the n = 2 case results in the increase of magnetic moments compared with the n = 1 case. The calculated magnetic moment per dopant Fe atom (2.39 mu B) is larger than both of the bulk value (2.22 mu B) and previous result for finite nanotube (1.7 mu B). For Co and Ni atoms doped in the tube, the magnetic moments are smaller than those of bulk metals. The Si-Si bond lengths for the hexagonal prisms decrease compared with that of the nanotube without transition metals, but there is no dependency on different dopants. The distances between the transition metals and Si atoms decrease as the atomic number of transition metals increases, which is the same trend for the atomic radii of transition metal atoms. The doping of transition metal atoms leads to the increase of the binding energy (BE).
URI
http://dspace.inha.ac.kr/handle/10505/1584
ISSN
0018-9464
Appears in Collections:
College of Natural Science(자연과학대학) > Physics (물리학) > Journal Papers, Peports(물리학 학술논문, 보고서)
Files in This Item:
Magnetic.pdfDownload

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse