Controlled physical properties and growth mechanism of manganese silicide nanorods
Document Type
Article
Publication Date
1-15-2021
Abstract
In this study, manganese silicide (Mn5Si3) nanorods grown on c-Si/SiO2 substrate by chemical vapor deposition were investigated in detail, where the reaction temperature was varied from 750 to 1, 000 degrees C. The Mn5Si3 nanorods were successfully grown at reaction temperatures above 750 degrees C. The growth of these Mn5Si3 nanorods was followed by a direct vapor transport process, which strongly dependent on the vapor pressure of the Mn precursor. Manganese silicide particles were used as the templates to initiate the growth of these nanorods. The results showed that increasing the reaction temperature increased the delivery of Mn vapor to the substrate surface. The magnetic properties of the Mn5Si3 nanorods were also investigated. The properties of the nanorods were influenced by the formation of Mn-rich silicide phase at higher reaction temperatures. The magnetic result indicated that the nanorods were mainly in ferromagnetic characteristic. The saturation magnetization values at 4 and 300 K were found to be higher at a reaction temperature of 950 degrees C, with a value of 0.70 and 0.03 emu/g, respectively. The maximum coercivity was obtained for the nanorods prepared at reaction temperature of 950 degrees C, with a value of 100 Oe. (C) 2020 Published by Elsevier B.V.
Keywords
Transition metal silicides, Manganese silicide, Nanorods, Chemical vapor deposition, Ferromagnetic
Divisions
Science
Funders
Fundamental Research Grant Scheme[FP114-2019A],Newton Advanced Fellowship 2016 Round 2[NA16010],Newton Advanced Fellowship 2016 Round 2[IF003-2017],Newton Advanced Fellowship 2016 Round 2[IF003-2017A]
Publication Title
Journal of Alloys and Compounds
Volume
851
Publisher
Elsevier
Publisher Location
PO BOX 564, 1001 LAUSANNE, SWITZERLAND