Magnetic glass-film based on single-nanosize 𝜺 -Fe2O3 nanoparticles

Marie Yoshikiyo; Asuka Namai; Kosuke Nakagawa; Shin-ichi Ohkoshi

doi:10.1063/1.4974976

AIP Advances (May 2017)

Magnetic glass-film based on single-nanosize 𝜺 -Fe2O3 nanoparticles

Marie Yoshikiyo,
Asuka Namai,
Kosuke Nakagawa,
Shin-ichi Ohkoshi

Affiliations

Marie Yoshikiyo: Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
Asuka Namai: Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
Kosuke Nakagawa: Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
Shin-ichi Ohkoshi: Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan

DOI: https://doi.org/10.1063/1.4974976
Journal volume & issue: Vol. 7, no. 5
pp. 056218 – 056218-6

Abstract

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We report a magnetic thin film of single-nanosize ε-Fe2O3 in SiO2 matrix. The glass-film was prepared by sintering a silica coated iron oxide hydroxide on a quartz substrate in air. The glass-film consists of ε-Fe2O3 of 8.8 nm size, and its thickness was 570 nm (0.57 μm) with a roughness of 10 nm (0.01 μm). UV-vis spectrum showed that the glass-film has small absorbance of 0.043 at 500 nm. The magneto-optical effect was investigated, and Faraday ellipticity showed a magnetic hysteresis loop with a coercive field of 3.0 ± 0.2 kOe. Furthermore, single-nanosize ε-Fe2O3 without silica was prepared as a reference sample, and ferroelectricity was observed. Therefore, the present thin glass-film consists of single-nanosize ferroelectric-ferromagnetic nanoparticles.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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