Modification of the Interface Nanostructure and Magnetic Properties in Nd-Fe-B Thin Films

The effects of Nd(2)Fe(14)B grain size and Nd coating on the coercivity in sputter-deposited Nd-Fe-B/Nd thin films have been investigated in order to gain an insight into the coercivity mechanism of Nd-Fe-B magnets. Highly textured Nd(2)Fe(14)B particles were grown successfully on the MgO(100) singl...

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Autores principales: Koike, Kunihiro, Kusano, Takanao, Ogawa, Daisuke, Kobayashi, Keisuke, Kato, Hiroaki, Oogane, Mikihiko, Miyazaki, Takamichi, Ando, Yasuo, Itakura, Masaru
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer US 2016
Materias:
Nano Express
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4718914/
https://www.ncbi.nlm.nih.gov/pubmed/26787052
http://dx.doi.org/10.1186/s11671-016-1227-x
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author Koike, Kunihiro
Kusano, Takanao
Ogawa, Daisuke
Kobayashi, Keisuke
Kato, Hiroaki
Oogane, Mikihiko
Miyazaki, Takamichi
Ando, Yasuo
Itakura, Masaru
author_facet Koike, Kunihiro
Kusano, Takanao
Ogawa, Daisuke
Kobayashi, Keisuke
Kato, Hiroaki
Oogane, Mikihiko
Miyazaki, Takamichi
Ando, Yasuo
Itakura, Masaru
author_sort Koike, Kunihiro
collection PubMed
description The effects of Nd(2)Fe(14)B grain size and Nd coating on the coercivity in sputter-deposited Nd-Fe-B/Nd thin films have been investigated in order to gain an insight into the coercivity mechanism of Nd-Fe-B magnets. Highly textured Nd(2)Fe(14)B particles were grown successfully on the MgO(100) single-crystal substrate with the Mo underlayer. As the Nd-Fe-B layer thickness t(NFB) was decreased from 70 to 5 nm, the coercivity H(c) increased gradually from 6.5 to 16 kOe. By depositing the Nd overlayer onto these films and post-annealing at 500 °C, the H(c) value further increased from 17.5 kOe (t(NFB)=70 nm) to 26.2 kOe (t(NFB)=5 nm). The amount of H(c) increase by the combination of the Nd coating and post-annealing was about 10 kOe irrespective of the t(NFB) value. These results therefore suggest an independence of size and interface effects on the coercivity of Nd-Fe-B magnets.
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spelling pubmed-47189142016-01-31 Modification of the Interface Nanostructure and Magnetic Properties in Nd-Fe-B Thin Films Koike, Kunihiro Kusano, Takanao Ogawa, Daisuke Kobayashi, Keisuke Kato, Hiroaki Oogane, Mikihiko Miyazaki, Takamichi Ando, Yasuo Itakura, Masaru Nanoscale Res Lett Nano Express The effects of Nd(2)Fe(14)B grain size and Nd coating on the coercivity in sputter-deposited Nd-Fe-B/Nd thin films have been investigated in order to gain an insight into the coercivity mechanism of Nd-Fe-B magnets. Highly textured Nd(2)Fe(14)B particles were grown successfully on the MgO(100) single-crystal substrate with the Mo underlayer. As the Nd-Fe-B layer thickness t(NFB) was decreased from 70 to 5 nm, the coercivity H(c) increased gradually from 6.5 to 16 kOe. By depositing the Nd overlayer onto these films and post-annealing at 500 °C, the H(c) value further increased from 17.5 kOe (t(NFB)=70 nm) to 26.2 kOe (t(NFB)=5 nm). The amount of H(c) increase by the combination of the Nd coating and post-annealing was about 10 kOe irrespective of the t(NFB) value. These results therefore suggest an independence of size and interface effects on the coercivity of Nd-Fe-B magnets. Springer US 2016-01-19 /pmc/articles/PMC4718914/ /pubmed/26787052 http://dx.doi.org/10.1186/s11671-016-1227-x Text en © Koike et al. 2016 Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Nano Express
Koike, Kunihiro
Kusano, Takanao
Ogawa, Daisuke
Kobayashi, Keisuke
Kato, Hiroaki
Oogane, Mikihiko
Miyazaki, Takamichi
Ando, Yasuo
Itakura, Masaru
Modification of the Interface Nanostructure and Magnetic Properties in Nd-Fe-B Thin Films
title Modification of the Interface Nanostructure and Magnetic Properties in Nd-Fe-B Thin Films
title_full Modification of the Interface Nanostructure and Magnetic Properties in Nd-Fe-B Thin Films
title_fullStr Modification of the Interface Nanostructure and Magnetic Properties in Nd-Fe-B Thin Films
title_full_unstemmed Modification of the Interface Nanostructure and Magnetic Properties in Nd-Fe-B Thin Films
title_short Modification of the Interface Nanostructure and Magnetic Properties in Nd-Fe-B Thin Films
title_sort modification of the interface nanostructure and magnetic properties in nd-fe-b thin films
topic Nano Express
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4718914/
https://www.ncbi.nlm.nih.gov/pubmed/26787052
http://dx.doi.org/10.1186/s11671-016-1227-x
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