Intrinsic magnetism of Zn1-xCoxO single-crystalline nanorods prepared by solvothermal method

被引：16

作者：

Zou, Youming ^{[1
]}

Qu, Zhe ^{[1
,2
]}

Fang, Jun ^{[1
]}

Zhang, Yuheng ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, High Field Magnet Lab, Hefei 230031, Peoples R China

[2] Univ Sci & Technol China, Hefei 230026, Peoples R China

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2009年 / 321卷 / 19期

基金：

中国国家自然科学基金;

关键词：

DMS; Ferromagnetism; Nano; DOPED ZNO; FERROMAGNETISM; GROWTH; OXIDE;

D O I：

10.1016/j.jmmm.2009.06.025

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We grew Zn1-xCoxO single-crystalline nanorods with x <= 0.1 by a solvothermal method and systematically investigated their properties and growth conditions. The nanorods were obtained at low temperature (120-190 degrees) and became thicker and finally transformed into polyhedrons with increasing growth temperature. Impure Co-phase microclusters appeared when the growth temperature exceeds 190 degrees. Co ions appeared in the +2 oxidation state in the nanorods, indicating that they were incorporated into the ZnO lattice. The magnetic properties evolved from a short-range ferromagnetic state at x = 0.05 to long-range ferromagnetic order at x = 0.10. Our results show that the ferromagnetism observed in Zn1-xCoxO was intrinsic and can be understood within the framework of the percolation of bound magnetic polarons. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：3352 / 3355

页数：4

共 14 条

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

Coey, JMD ;

Venkatesan, M ;

Fitzgerald, CB .

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

[2] 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

[3] Hole-mediated ferromagnetism in tetrahedrally coordinated semiconductors [J].

Dietl, T ;

Ohno, H ;

Matsukura, F .

PHYSICAL REVIEW B, 2001, 63 (19)

[4] Large-scale Ni-doped ZnO nanowire arrays and electrical and optical properties [J].

He, JH ;

Lao, CS ;

Chen, LJ ;

Davidovic, D ;

Wang, ZL .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2005, 127 (47) :16376-16377

[5] Combinatorial laser MBE synthesis of 3d ion doped epitaxial ZnO thin films [J].

Jin, ZW ;

Murakami, M ;

Fukumura, T ;

Matsumoto, Y ;

Ohtomo, A ;

Kawasaki, M ;

Koinuma, H .

JOURNAL OF CRYSTAL GROWTH, 2000, 214 :55-58

[6] Ferromagnetic order induced by photogenerated carriers in magnetic III-V semiconductor heterostructures of (In,Mn)As/GaSb [J].

Koshihara, S ;

Oiwa, A ;

Hirasawa, M ;

Katsumoto, S ;

Iye, Y ;

Urano, C ;

Takagi, H ;

Munekata, H .

PHYSICAL REVIEW LETTERS, 1997, 78 (24) :4617-4620

[7] HYDROTHERMAL SYNTHESIS OF ZINC OXIDE AND ZINC SULFIDE [J].

LAUDISE, RA ;

BALLMAN, AA .

JOURNAL OF PHYSICAL CHEMISTRY, 1960, 64 (05) :688-691

[8] Growth mechanism and growth habit of oxide crystals [J].

Li, WJ ;

Shi, EW ;

Zhong, WZ ;

Yin, ZW .

JOURNAL OF CRYSTAL GROWTH, 1999, 203 (1-2) :186-196

[9] Co-metal clustering as the origin of ferromagnetism in Co-doped ZnO thin films [J].

Park, JH ;

Kim, MG ;

Jang, HM ;

Ryu, S ;

Kim, YM .

APPLIED PHYSICS LETTERS, 2004, 84 (08) :1338-1340

[10] Advances in wide bandgap materials for semiconductor spintronics [J].

Pearton, SJ ;

Abernathy, CR ;

Norton, DP ;

Hebard, AF ;

Park, YD ;

Boatner, LA ;

Budai, JD .

MATERIALS SCIENCE & ENGINEERING R-REPORTS, 2003, 40 (04) :137-168

← 1 2 →