Magnetization study of nanograined pure and Mn-doped ZnO films: Formation of a ferromagnetic grain-boundary foam

被引：340
作者：
Straumal, Boris B. [1 ,2 ,3 ]
Mazilkin, Andrei A. [1 ,2 ]
Protasova, Svetlana G. [1 ,2 ]
Myatiev, Ata A. [3 ]
Straumal, Petr B. [3 ,4 ]
Schuetz, Gisela [1 ]
van Aken, Peter A. [1 ]
Goering, Eberhard [1 ]
Baretzky, Brigitte [1 ]
机构：
[1] Max Planck Inst Met Res, D-70569 Stuttgart, Germany
[2] Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Moscow District, Russia
[3] Technol Univ, Moscow Steel & Alloys Inst, Moscow 119991, Russia
[4] Univ Munster, Inst Mat Phys, D-48149 Munster, Germany
来源：
PHYSICAL REVIEW B | 2009年 / 79卷 / 20期
基金：
俄罗斯基础研究基金会;
关键词：
ferromagnetic materials; grain boundaries; magnetisation; manganese; nanostructured materials; vacancies (crystal); zinc compounds; ROOM-TEMPERATURE FERROMAGNETISM; THIN-FILMS; OPTICAL-PROPERTIES; SEMICONDUCTORS; CO; NANOWIRES; MAGNETISM; NANORODS; SYSTEM; ZNMNO;
D O I：
10.1103/PhysRevB.79.205206
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In order to elucidate room-temperature (RT) ferromagnetism (FM) in ZnO, we have analyzed a multitude of experimental publications with respect to the ratio of grain-boundary (GB) area to grain volume. FM only appears if this ratio exceeds a certain threshold value s(th). Based on these important results nanograined pure and Mn-doped ZnO films have been prepared, which reveal reproducible RT FM and magnetization proportional to the film thickness, even for pure ZnO films. Our findings strongly suggest that grain boundaries and related vacancies are the intrinsic origin for RT ferromagnetism.
引用
收藏
页数：6
相关论文
共 73 条
[61]   Magnetic Properties of Mn-Doped ZnO Nanorods [J].
Wang, D. F. ;
Park, S. Y. ;
Lee, Y. P. .
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, 2008, 53 (04) :2257-2260
[62]   Room-temperature ferromagnetism of ZnO/Zn0.96Mn0.04O core-shell nanowimble [J].
Wang, D. F. ;
Park, S. Y. ;
Lee, H. W. ;
Lee, Y. S. ;
Lam, V. D. ;
Lee, Y. P. .
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 2007, 204 (12) :4029-4032
[63]   Photoemission study of Zn1-xCoxO as a possible DMS [J].
Wi, SC ;
Kang, JS ;
Kim, JH ;
Lee, SS ;
Cho, SB ;
Kim, BJ ;
Yoon, S ;
Suh, BJ ;
Han, SW ;
Kim, KH ;
Kim, KJ ;
Kim, BS ;
Song, HJ ;
Shin, HJ ;
Shim, JH ;
Min, BI .
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 2004, 241 (07) :1529-1532
[64]   Structural characterization and low temperature growth of ferromagnetic Bi-Cu codoped ZnO bicrystal nanowires [J].
Xu, C. ;
Chun, J. ;
Kim, D. ;
Chon, B. ;
Joo, T. .
APPLIED PHYSICS LETTERS, 2007, 91 (15)
[65]   Room temperature ferromagnetism in ZnO films due to defects [J].
Xu, Qingyu ;
Schmidt, Heidemarie ;
Zhou, Shengqiang ;
Potzger, Kay ;
Helm, Manfred ;
Hochmuth, Holger ;
Lorenz, Michael ;
Setzer, Annette ;
Esquinazi, Pablo ;
Meinecke, Christoph ;
Grundmann, Marius .
APPLIED PHYSICS LETTERS, 2008, 92 (08)
[66]   Spatial distribution of manganese and room temperature ferromagnetism in manganese-doped ZnO nanorods [J].
Yan, H. L. ;
Wang, J. B. ;
Zhong, X. L. ;
Zhou, Y. C. .
APPLIED PHYSICS LETTERS, 2008, 93 (14)
[67]   Surfactant-free fabrication of ZnO spheres and pseudospherical structures [J].
Yan, Zijie ;
Ma, Yanwei ;
Wang, Dongliang ;
Wang, Junhong ;
Gao, Zhaoshun ;
Song, Tao .
JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (25) :9219-9222
[68]   Impact of annealing on morphology and ferromagnetism of ZnO nanorods [J].
Yan, Zijie ;
Ma, Yanwei ;
Wang, Dongliang ;
Wang, Junhong ;
Gao, Zhaoshun ;
Wang, Lei ;
Yu, Peng ;
Song, Tao .
APPLIED PHYSICS LETTERS, 2008, 92 (08)
[69]   Structure and magnetic properties of Mn-doped ZnO semiconductors [J].
Yang, J. H. ;
Zhao, L. Y. ;
Zhang, Y. J. ;
Wang, Y. X. ;
Liu, H. L. ;
Wei, M. B. .
SOLID STATE COMMUNICATIONS, 2007, 143 (11-12) :566-569
[70]   Ferromagnetism in ZnO nanowires derived from electro-deposition on AAO template and subsequent oxidation [J].
Yi, J. B. ;
Pan, H. ;
Lin, J. Y. ;
Ding, J. ;
Feng, Y. P. ;
Thongmee, S. ;
Liu, T. ;
Gong, H. ;
Wang, L. .
ADVANCED MATERIALS, 2008, 20 (06) :1170-+
12345678