Structure and ferromagnetic properties of Co-doped ZnO powders

被引:48
作者
Xu, Xingyan [1 ]
Cao, Chuanbao [1 ]
机构
[1] Beijing Inst Technol, Res Ctr Mat Sci, Beijing 100081, Peoples R China
基金
中国国家自然科学基金;
关键词
Diluted magnetic semiconductor; Co-doped ZnO; Optical properties; Magnetic properties; ROOM-TEMPERATURE FERROMAGNETISM; THIN-FILMS; MAGNETIC SEMICONDUCTORS; ENHANCEMENT; ZN1-XCOXO; BULK;
D O I
10.1016/j.jmmm.2009.01.017
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Single-phase Zn1-xCoxO (x = 0.02, 0.04) powders were synthesized by a simple co-precipitation technique. X-ray diffraction analysis reveals that the Co-doped ZnO crystallizes in a wurtzite structure. The lattice constants of Co-doped ZnO powders decrease slightly when Co is doped into ZnO. Optical absorption spectra show a decrease in the bandgap with increasing Co content and also give an evidence of the presence of Co2+ ions in tetrahedral sites. Raman spectra indicate that Co doping increased the lattice defects and induced another Raman vibration mode around at 538 cm(-1), which is an indicator for the incorporation of Co2+ ions into the ZnO host matrix. Magnetic measurement reveals that the Zn1-xCoxO (x = 0.02, 0.04) powders clearly exhibit room-temperature ferromagnetic behavior, which makes them potentially useful as building components for spintronics. (c) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码:2216 / 2219
页数:4
相关论文
共 29 条
[1]   Absence of ferromagnetism in Al-doped Zn0.9Co0.10O diluted magnetic semiconductors [J].
Alaria, J ;
Bieber, H ;
Colis, S ;
Schmerber, G ;
Dinia, A .
APPLIED PHYSICS LETTERS, 2006, 88 (11)
[2]   EFFECTS OF SURFACE MAGNETIZATION ON THE SURFACE PHONONS OF FE(110) BY HELIUM ATOM SCATTERING [J].
BENEDEK, G ;
TOENNIES, JP ;
ZHANG, G .
PHYSICAL REVIEW LETTERS, 1992, 68 (17) :2644-2647
[3]   Antiferromagnetism in bulk Zn1-xCoxO magnetic semiconductors prepared by the coprecipitation technique -: art. no. 052501 [J].
Bouloudenine, M ;
Viart, N ;
Colis, S ;
Kortus, J ;
Dinia, A .
APPLIED PHYSICS LETTERS, 2005, 87 (05)
[4]   Bulk Zn1-xCoxO magnetic semiconductors prepared by hydrothermal technique [J].
Bouloudenine, M ;
Viart, N ;
Colis, S ;
Dinia, A .
CHEMICAL PHYSICS LETTERS, 2004, 397 (1-3) :73-76
[5]   Raman scattering in ZnO thin films doped with Fe, Sb, Al, Ga, and Li [J].
Bundesmann, C ;
Ashkenov, N ;
Schubert, M ;
Spemann, D ;
Butz, T ;
Kaidashev, EM ;
Lorenz, M ;
Grundmann, M .
APPLIED PHYSICS LETTERS, 2003, 83 (10) :1974-1976
[6]   The vibrational properties of one-dimensional ZnO:Ce nanostructures [J].
Cheng, BC ;
Xiao, YH ;
Wu, GS ;
Zhang, LD .
APPLIED PHYSICS LETTERS, 2004, 84 (03) :416-418
[7]   Effects of rapid thermal annealing on the ferromagnetic properties of sputtered Zn1-x(Co0.5Fe0.5)xO thin films [J].
Cho, YM ;
Choo, WK ;
Kim, H ;
Kim, D ;
Ihm, Y .
APPLIED PHYSICS LETTERS, 2002, 80 (18) :3358-3360
[8]   Synthesis and ferromagnetic properties of lightly doped nanocrystalline Zn1-xCoxO [J].
Deka, S ;
Pasricha, R ;
Joy, PA .
CHEMISTRY OF MATERIALS, 2004, 16 (07) :1168-1169
[9]   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
[10]   Significant enhancement of room temperature ferromagnetism in surfactant coated polycrystalline Mn doped ZnO particles [J].
Jayakumar, O. D. ;
Gopalakrishnan, I. K. ;
Sudakar, C. ;
Kadam, R. M. ;
Kulshreshtha, S. K. .
JOURNAL OF ALLOYS AND COMPOUNDS, 2007, 438 (1-2) :258-262