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Ferromagnetic behaviour of ZnO: the role of grain boundaries

The possibility to attain ferromagnetic properties in transparent semiconductor oxides such as ZnO is very promising for future spintronic applications. We demonstrate in this review that ferromagnetism is not an intrinsic property of the ZnO crystalline lattice but is that of ZnO/ZnO grain boundari...

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Autores principales: Straumal, Boris Borisovich, Protasova, Svetlana G, Mazilkin, Andrei A, Goering, Eberhard, Schütz, Gisela, Straumal, Petr B, Baretzky, Brigitte
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Beilstein-Institut 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5238656/
https://www.ncbi.nlm.nih.gov/pubmed/28144542
http://dx.doi.org/10.3762/bjnano.7.185
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author Straumal, Boris Borisovich
Protasova, Svetlana G
Mazilkin, Andrei A
Goering, Eberhard
Schütz, Gisela
Straumal, Petr B
Baretzky, Brigitte
author_facet Straumal, Boris Borisovich
Protasova, Svetlana G
Mazilkin, Andrei A
Goering, Eberhard
Schütz, Gisela
Straumal, Petr B
Baretzky, Brigitte
author_sort Straumal, Boris Borisovich
collection PubMed
description The possibility to attain ferromagnetic properties in transparent semiconductor oxides such as ZnO is very promising for future spintronic applications. We demonstrate in this review that ferromagnetism is not an intrinsic property of the ZnO crystalline lattice but is that of ZnO/ZnO grain boundaries. If a ZnO polycrystal contains enough grain boundaries, it can transform into the ferromagnetic state even without doping with “magnetic atoms” such as Mn, Co, Fe or Ni. However, such doping facilitates the appearance of ferromagnetism in ZnO. It increases the saturation magnetisation and decreases the critical amount of grain boundaries needed for FM. A drastic increase of the total solubility of dopants in ZnO with decreasing grain size has been also observed. It is explained by the multilayer grain boundary segregation.
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spelling pubmed-52386562017-01-31 Ferromagnetic behaviour of ZnO: the role of grain boundaries Straumal, Boris Borisovich Protasova, Svetlana G Mazilkin, Andrei A Goering, Eberhard Schütz, Gisela Straumal, Petr B Baretzky, Brigitte Beilstein J Nanotechnol Review The possibility to attain ferromagnetic properties in transparent semiconductor oxides such as ZnO is very promising for future spintronic applications. We demonstrate in this review that ferromagnetism is not an intrinsic property of the ZnO crystalline lattice but is that of ZnO/ZnO grain boundaries. If a ZnO polycrystal contains enough grain boundaries, it can transform into the ferromagnetic state even without doping with “magnetic atoms” such as Mn, Co, Fe or Ni. However, such doping facilitates the appearance of ferromagnetism in ZnO. It increases the saturation magnetisation and decreases the critical amount of grain boundaries needed for FM. A drastic increase of the total solubility of dopants in ZnO with decreasing grain size has been also observed. It is explained by the multilayer grain boundary segregation. Beilstein-Institut 2016-12-07 /pmc/articles/PMC5238656/ /pubmed/28144542 http://dx.doi.org/10.3762/bjnano.7.185 Text en Copyright © 2016, Straumal et al. https://creativecommons.org/licenses/by/4.0https://www.beilstein-journals.org/bjnano/termsThis is an Open Access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The license is subject to the Beilstein Journal of Nanotechnology terms and conditions: (https://www.beilstein-journals.org/bjnano/terms)
spellingShingle Review
Straumal, Boris Borisovich
Protasova, Svetlana G
Mazilkin, Andrei A
Goering, Eberhard
Schütz, Gisela
Straumal, Petr B
Baretzky, Brigitte
Ferromagnetic behaviour of ZnO: the role of grain boundaries
title Ferromagnetic behaviour of ZnO: the role of grain boundaries
title_full Ferromagnetic behaviour of ZnO: the role of grain boundaries
title_fullStr Ferromagnetic behaviour of ZnO: the role of grain boundaries
title_full_unstemmed Ferromagnetic behaviour of ZnO: the role of grain boundaries
title_short Ferromagnetic behaviour of ZnO: the role of grain boundaries
title_sort ferromagnetic behaviour of zno: the role of grain boundaries
topic Review
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5238656/
https://www.ncbi.nlm.nih.gov/pubmed/28144542
http://dx.doi.org/10.3762/bjnano.7.185
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