Effect of crystallization quality on ferromagnetism in Zn1-xCoxO nanopowders

被引：15

作者：

Ma, Jing ^{[1
]}

Hao, Weichang ^{[1
]}

Luo, Ruiying ^{[1
]}

Xu, Huaizhe ^{[1
]}

机构：

[1] Beihang Univ, Ctr Mat Phys & Chem, Beijing 100083, Peoples R China

来源：

MATERIALS LETTERS | 2008年 / 62卷 / 03期

关键词：

diluted magnetic semiconductors; sol-gel preparation; crystallization quality; Co2+-doped ZnO; XRD;

D O I：

10.1016/j.matlet.2007.05.042

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, a series of Zn1-xCoxO nanocrystals with different cobalt percentages were fabricated by a simple chemical method, which were intensively explored for spintronics applications. X-ray diffraction (XRD), ultraviolet-visible (UV-Vis) spectrophotometer, transmission electron microscope (TEM) and vibrating sample magnetometer (VSM) were used to characterize the structures and magnetic properties of prepared samples. It was concluded that Co2+ was well inserted into ZnO wurtzite structure. The ferromagnetism of Zn1-xCoxO nanopowders was observed at room temperature. The relation between crystallization quality and magnetism of Zn1-xCoxO nanopowders was discussed in detail. It was demonstrated the crystallization quality of Zn1-xCoxO nanocrystals had a strong effect on the ferromagnetism. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：403 / 406

页数：4

共 13 条

[1] Magnetic properties of Co-doped ZnO diluted magnetic semiconductors prepared by low-temperature mechano synthesis [J].

Colis, S ;

Bieber, H ;

Bégin-Colin, S ;

Schmerber, G ;

Leuvrey, C ;

Dinia, A .

CHEMICAL PHYSICS LETTERS, 2006, 422 (4-6) :529-533

[2] Injection and detection of a spin-polarized current in a light-emitting diode [J].

Fiederling, R ;

Keim, M ;

Reuscher, G ;

Ossau, W ;

Schmidt, G ;

Waag, A ;

Molenkamp, LW .

NATURE, 1999, 402 (6763) :787-790

[3] Room-temperature spin coherence in ZnO [J].

Ghosh, S ;

Sih, V ;

Lau, WH ;

Awschalom, DD ;

Bae, SY ;

Wang, S ;

Vaidya, S ;

Chapline, G .

APPLIED PHYSICS LETTERS, 2005, 86 (23) :1-3

[4] Magnetic resonant tunnelling diodes as voltage-controlled spin selectors [J].

Gould, C ;

Slobodskyy, A ;

Slobodskyy, T ;

Grabs, P ;

Becker, CR ;

Schmidt, G ;

Molenkamp, LW .

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 2004, 241 (03) :700-703

[5] Robust electrical spin injection into a semiconductor heterostructure [J].

Jonker, BT ;

Park, YD ;

Bennett, BR ;

Cheong, HD ;

Kioseoglou, G ;

Petrou, A .

PHYSICAL REVIEW B, 2000, 62 (12) :8180-8183

[6]

Kevin R., 2006, Nat. Mater, V5, P291, DOI [10.1038/nmat1616, DOI 10.1038/NMAT1616]

[7]

KEVIN R, 2006, J APPL PHYS, V99

[8] Spectroscopic ellipsometry study of optical transitions in Zn1-xCoxO alloys [J].

Kim, KJ ;

Park, YR .

APPLIED PHYSICS LETTERS, 2002, 81 (08) :1420-1422

[9]

Liu WK, 2005, J PHYS CHEM B, V109, P14486, DOI 10.1021/jp0518781

[10] Electrical spin injection in a ferromagnetic semiconductor heterostructure [J].

Ohno, Y ;

Young, DK ;

Beschoten, B ;

Matsukura, F ;

Ohno, H ;

Awschalom, DD .

NATURE, 1999, 402 (6763) :790-792

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