Cargando…

Mesoscopic bar magnet based on ε-Fe(2)O(3) hard ferrite

Ferrite magnets have a long history. They are used in motors, magnetic fluids, drug delivery systems, etc. Herein we report a mesoscopic ferrite bar magnet based on rod-shaped ε-Fe(2)O(3) with a large coercive field (>25 kOe). The ε-Fe(2)O(3)–based bar magnet is a single crystal with a single mag...

Descripción completa

Detalles Bibliográficos
Autores principales: Ohkoshi, Shin-ichi, Namai, Asuka, Yamaoka, Takehiro, Yoshikiyo, Marie, Imoto, Kenta, Nasu, Tomomichi, Anan, Shizuka, Umeta, Yoshikazu, Nakagawa, Kosuke, Tokoro, Hiroko
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4895237/
https://www.ncbi.nlm.nih.gov/pubmed/27273575
http://dx.doi.org/10.1038/srep27212
_version_ 1782435807862194176
author Ohkoshi, Shin-ichi
Namai, Asuka
Yamaoka, Takehiro
Yoshikiyo, Marie
Imoto, Kenta
Nasu, Tomomichi
Anan, Shizuka
Umeta, Yoshikazu
Nakagawa, Kosuke
Tokoro, Hiroko
author_facet Ohkoshi, Shin-ichi
Namai, Asuka
Yamaoka, Takehiro
Yoshikiyo, Marie
Imoto, Kenta
Nasu, Tomomichi
Anan, Shizuka
Umeta, Yoshikazu
Nakagawa, Kosuke
Tokoro, Hiroko
author_sort Ohkoshi, Shin-ichi
collection PubMed
description Ferrite magnets have a long history. They are used in motors, magnetic fluids, drug delivery systems, etc. Herein we report a mesoscopic ferrite bar magnet based on rod-shaped ε-Fe(2)O(3) with a large coercive field (>25 kOe). The ε-Fe(2)O(3)–based bar magnet is a single crystal with a single magnetic domain along the longitudinal direction. A wide frequency range spectroscopic study shows that the crystallographic a-axis of ε-Fe(2)O(3), which corresponds to the longitudinal direction of the bar magnet, plays an important role in linear and non-linear magneto-optical transitions, phonon modes, and the magnon (Kittel mode). Due to its multiferroic property, a magnetic-responsive non-linear optical sheet is manufactured as an application using an ε-Fe(2)O(3)–based bar magnet, resin, and polyethylene terephthalate. Furthermore, from the viewpoint of the large coercive field property, we demonstrate that a mesoscopic ε-Fe(2)O(3) bar magnet can be used as a magnetic force microscopy probe.
format Online
Article
Text
id pubmed-4895237
institution National Center for Biotechnology Information
language English
publishDate 2016
publisher Nature Publishing Group
record_format MEDLINE/PubMed
spelling pubmed-48952372016-06-10 Mesoscopic bar magnet based on ε-Fe(2)O(3) hard ferrite Ohkoshi, Shin-ichi Namai, Asuka Yamaoka, Takehiro Yoshikiyo, Marie Imoto, Kenta Nasu, Tomomichi Anan, Shizuka Umeta, Yoshikazu Nakagawa, Kosuke Tokoro, Hiroko Sci Rep Article Ferrite magnets have a long history. They are used in motors, magnetic fluids, drug delivery systems, etc. Herein we report a mesoscopic ferrite bar magnet based on rod-shaped ε-Fe(2)O(3) with a large coercive field (>25 kOe). The ε-Fe(2)O(3)–based bar magnet is a single crystal with a single magnetic domain along the longitudinal direction. A wide frequency range spectroscopic study shows that the crystallographic a-axis of ε-Fe(2)O(3), which corresponds to the longitudinal direction of the bar magnet, plays an important role in linear and non-linear magneto-optical transitions, phonon modes, and the magnon (Kittel mode). Due to its multiferroic property, a magnetic-responsive non-linear optical sheet is manufactured as an application using an ε-Fe(2)O(3)–based bar magnet, resin, and polyethylene terephthalate. Furthermore, from the viewpoint of the large coercive field property, we demonstrate that a mesoscopic ε-Fe(2)O(3) bar magnet can be used as a magnetic force microscopy probe. Nature Publishing Group 2016-06-07 /pmc/articles/PMC4895237/ /pubmed/27273575 http://dx.doi.org/10.1038/srep27212 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Ohkoshi, Shin-ichi
Namai, Asuka
Yamaoka, Takehiro
Yoshikiyo, Marie
Imoto, Kenta
Nasu, Tomomichi
Anan, Shizuka
Umeta, Yoshikazu
Nakagawa, Kosuke
Tokoro, Hiroko
Mesoscopic bar magnet based on ε-Fe(2)O(3) hard ferrite
title Mesoscopic bar magnet based on ε-Fe(2)O(3) hard ferrite
title_full Mesoscopic bar magnet based on ε-Fe(2)O(3) hard ferrite
title_fullStr Mesoscopic bar magnet based on ε-Fe(2)O(3) hard ferrite
title_full_unstemmed Mesoscopic bar magnet based on ε-Fe(2)O(3) hard ferrite
title_short Mesoscopic bar magnet based on ε-Fe(2)O(3) hard ferrite
title_sort mesoscopic bar magnet based on ε-fe(2)o(3) hard ferrite
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4895237/
https://www.ncbi.nlm.nih.gov/pubmed/27273575
http://dx.doi.org/10.1038/srep27212
work_keys_str_mv AT ohkoshishinichi mesoscopicbarmagnetbasedonefe2o3hardferrite
AT namaiasuka mesoscopicbarmagnetbasedonefe2o3hardferrite
AT yamaokatakehiro mesoscopicbarmagnetbasedonefe2o3hardferrite
AT yoshikiyomarie mesoscopicbarmagnetbasedonefe2o3hardferrite
AT imotokenta mesoscopicbarmagnetbasedonefe2o3hardferrite
AT nasutomomichi mesoscopicbarmagnetbasedonefe2o3hardferrite
AT ananshizuka mesoscopicbarmagnetbasedonefe2o3hardferrite
AT umetayoshikazu mesoscopicbarmagnetbasedonefe2o3hardferrite
AT nakagawakosuke mesoscopicbarmagnetbasedonefe2o3hardferrite
AT tokorohiroko mesoscopicbarmagnetbasedonefe2o3hardferrite