Fe doping and magnetic properties of zincblende SiC ceramics

被引：24

作者：

Kim, Kwang Joo ^{[2
]}

Kim, Young-Wook ^{[1
]}

机构：

[1] Univ Seoul, Dept Mat Sci & Engn, Seoul 130743, South Korea

[2] Konkuk Univ, Dept Phys, Seoul 143701, South Korea

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2012年 / 32卷 / 05期

基金：

新加坡国家研究基金会;

关键词：

SiC; Hot pressing; Magnetic properties; Electrical properties; SILICON-CARBIDE; ELECTRICAL-PROPERTIES; FERROMAGNETISM; CARBON; FILMS;

D O I：

10.1016/j.jeurceramsoc.2011.11.037

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Fe-doped SiC bulk ceramics were fabricated by hot-pressing, and their magnetic and electronic properties were investigated. Si1-xFexC (x <= 0.04) samples having a zincblende crystal structure exhibited ferromagnetic hysteresis at room temperature with the saturation magnetization increasing with x. X-ray diffraction measurements revealed the creation of a Fe3Si phase in the samples with its density increasing with x. The samples were found to be p-type semiconductors with a hole concentration (electrical resistivity) of similar to 10(19) cm(-3) (similar to 10(0) Omega cm) at room temperature. The observed magnetic properties of the samples are mainly ascribed to the presence of ferromagnetic Fe3Si crystallites. The high carrier concentration of the samples likely implies the existence of acceptors due to individual Fe3+ occupation of the Si sites in the lattice. The randomly distributed Fe3+ ions represent a minor contribution to the magnetization of the samples through the formation of magnetic polarons with the carriers. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：1149 / 1155

页数：7

共 38 条

[1] Electrically conductive SiC-(Nb,Ti)ss-(Nb,Ti)Css cermet [J].

Balog, M ;

Sajgalík, P ;

Hofer, F ;

Warbichler, P ;

Fröhlich, K ;

Vávra, O ;

Janega, J ;

Huang, JL .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2006, 26 (07) :1259-1266

[2] Relationships between microstructure and electrical properties of liquid-phase sintered silicon carbide materials using impedance spectroscopy [J].

Can, A. ;

McLachlan, D. S. ;

Sauti, G. ;

Herrmann, M. .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2007, 27 (2-3) :1361-1363

[3] Densification of liquid phase sintered silicon carbide [J].

Can, A ;

Herrmann, M ;

McLachlan, DS ;

Sigalas, I ;

Adler, J .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2006, 26 (09) :1707-1713

[4]

Chikazumi S, 1997, PHYS FERROMAGNETISM, P227

[5] Donor impurity band exchange in dilute ferromagnetic oxides [J].

Coey, JMD ;

Venkatesan, M ;

Fitzgerald, CB .

NATURE MATERIALS, 2005, 4 (02) :173-179

[6] Zener model description of ferromagnetism in zinc-blende magnetic semiconductors [J].

Dietl, T ;

Ohno, H ;

Matsukura, F ;

Cibert, J ;

Ferrand, D .

SCIENCE, 2000, 287 (5455) :1019-1022

[7] Amorphous silicon carbide TFTs [J].

Estrada, M. ;

Cerdeira, A. ;

Resendiz, L. ;

Garcia, R. ;

Iniguez, B. ;

Marsal, L. F. ;

Pallares, J. .

SOLID-STATE ELECTRONICS, 2006, 50 (03) :460-467

[8] Processing of high performance silicon carbide [J].

Hirata, Yoshihiro ;

Matsunaga, Naoki ;

Hidaka, Nobuhiro ;

Tabata, Shuhei ;

Sameshima, Soichiro .

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN, 2008, 116 (1354) :665-673

[9] Particle size effect of starting SiC on processing, microstructures and mechanical properties of liquid phase-sintered SiC [J].

Hirata, Yoshihiro ;

Suzue, Naoto ;

Matsunaga, Naoki ;

Sameshima, Soichiro .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2010, 30 (09) :1945-1954

[10] Conductive SiC as an intermediate layer for CSITF solar cells [J].

Janz, S ;

Reber, S ;

Lutz, F ;

Schetter, C .

THIN SOLID FILMS, 2006, 511 :271-274

← 1 2 3 4 →