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

Boris B. Straumal; Andrei A. Mazilkin; Svetlana G. Protasova; Ata A. Myatiev; Petr B. Straumal; Gisela Schütz; Peter A. Van Aken; Eberhard Goering; Brigitte Baretzky

doi:10.1103/PhysRevB.79.205206

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

Boris B. Straumal, Andrei A. Mazilkin, Svetlana G. Protasova, Ata A. Myatiev, Petr B. Straumal, Gisela Schütz, Peter A. Van Aken, Eberhard Goering, Brigitte Baretzky

Research output: Contribution to journal › Article › peer-review

352 Scopus citations

Abstract

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 sth. 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.

Original language	English
Article number	205206
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	79
Issue number	20
DOIs	https://doi.org/10.1103/PhysRevB.79.205206
State	Published - 1 May 2009
Externally published	Yes

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Straumal, B. B., Mazilkin, A. A., Protasova, S. G., Myatiev, A. A., Straumal, P. B., Schütz, G., Van Aken, P. A., Goering, E., & Baretzky, B. (2009). Magnetization study of nanograined pure and Mn-doped ZnO films: Formation of a ferromagnetic grain-boundary foam. Physical Review B - Condensed Matter and Materials Physics, 79(20), Article 205206. https://doi.org/10.1103/PhysRevB.79.205206

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

abstract = "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 sth. 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.",

author = "Straumal, {Boris B.} and Mazilkin, {Andrei A.} and Protasova, {Svetlana G.} and Myatiev, {Ata A.} and Straumal, {Petr B.} and Gisela Sch{\"u}tz and {Van Aken}, {Peter A.} and Eberhard Goering and Brigitte Baretzky",

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doi = "10.1103/PhysRevB.79.205206",

language = "English",

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Straumal, BB, Mazilkin, AA, Protasova, SG, Myatiev, AA, Straumal, PB, Schütz, G, Van Aken, PA, Goering, E & Baretzky, B 2009, 'Magnetization study of nanograined pure and Mn-doped ZnO films: Formation of a ferromagnetic grain-boundary foam', Physical Review B - Condensed Matter and Materials Physics, vol. 79, no. 20, 205206. https://doi.org/10.1103/PhysRevB.79.205206

TY - JOUR

T1 - Magnetization study of nanograined pure and Mn-doped ZnO films

T2 - Formation of a ferromagnetic grain-boundary foam

AU - Straumal, Boris B.

AU - Mazilkin, Andrei A.

AU - Protasova, Svetlana G.

AU - Myatiev, Ata A.

AU - Straumal, Petr B.

AU - Schütz, Gisela

AU - Van Aken, Peter A.

AU - Goering, Eberhard

AU - Baretzky, Brigitte

PY - 2009/5/1

Y1 - 2009/5/1

N2 - 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 sth. 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.

AB - 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 sth. 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.

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JF - Physical Review B - Condensed Matter and Materials Physics

IS - 20

M1 - 205206

ER -

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

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