Magnetic-Pole Flip by Millimeter Wave.
epsilon iron oxide
magnetic recording
magnetization reversal
millimeter waves
nanoparticles
Journal
Advanced materials (Deerfield Beach, Fla.)
ISSN: 1521-4095
Titre abrégé: Adv Mater
Pays: Germany
ID NLM: 9885358
Informations de publication
Date de publication:
Dec 2020
Dec 2020
Historique:
received:
18
07
2020
revised:
30
08
2020
pubmed:
9
10
2020
medline:
9
10
2020
entrez:
8
10
2020
Statut:
ppublish
Résumé
In the era of Big Data and the Internet of Things, data archiving is a key technology. From this viewpoint, magnetic recordings are drawing attention because they guarantee long-term data storage. To archive an enormous amount of data, further increase of the recording density is necessary. Herein a new magnetic recording methodology, "focused-millimeter-wave-assisted magnetic recording (F-MIMR)," is proposed. To test this methodology, magnetic films based on epsilon iron oxide nanoparticles are prepared and a focused-millimeter-wave generator is constructed using terahertz (THz) light. Irradiating the focused millimeter wave to epsilon iron oxide instantly switches its magnetic pole direction. The spin dynamics of F-MIMR are also calculated using the stochastic Landau-Lifshitz-Gilbert model considering all of the spins in an epsilon iron oxide nanoparticle. In F-MIMR, the heat-up effect of the recording media is expected to be suppressed. Thus, F-MIMR can be applied to high-density magnetic recordings.
Identifiants
pubmed: 33029839
doi: 10.1002/adma.202004897
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
e2004897Subventions
Organisme : Advanced Research Program for Energy and Environmental Technologies
ID : P14004
Organisme : NEDO
Organisme : JSPS
ID : 15H05697
Organisme : JSPS
ID : 20H00369
Organisme : JSPS
ID : 16H06521
Organisme : JSPS
ID : 18K03444
Organisme : JSPS
ID : 20H02206
Organisme : Ministry of Education, Culture, Sports, Science and Technology
Organisme : ESICMM
ID : 12016013
Organisme : Grant-in-Aid for Scientific Research on Innovative Area Soft Crystals
ID : 2903
Organisme : Grant-in-Aid for Scientific Research on Innovative Area Soft Crystals
ID : 17H06367
Informations de copyright
© 2020 The Authors. Published by Wiley-VCH GmbH.
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