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Asuka NAMAI
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ε-Fe2O3: An Advanced Nanomaterial Exhibiting Giant Coercive Field, Millimeter-Wave Ferromagnetic Resonance, and Magnetoelectric Coupling
J Tucek, R Zboril, A Namai, S Ohkoshi
Chemistry of Materials 22 (24), 6483-6505, 2010
3862010
First Observation of Phase Transformation of All Four Fe2O3 Phases (γ → ε → β → α-Phase)
S Sakurai, A Namai, K Hashimoto, S Ohkoshi
Journal of the American Chemical Society 131 (51), 18299-18303, 2009
3732009
90-degree optical switching of output second-harmonic light in chiral photomagnet
S Ohkoshi, S Takano, K Imoto, M Yoshikiyo, A Namai, H Tokoro
Nature Photonics 8 (1), 65-71, 2014
3072014
Synthesis of a metal oxide with a room-temperature photoreversible phase transition
S Ohkoshi, Y Tsunobuchi, T Matsuda, K Hashimoto, A Namai, F Hakoe, ...
Nature chemistry 2 (7), 539-545, 2010
2822010
Synthesis of an electromagnetic wave absorber for high-speed wireless communication
A Namai, S Sakurai, M Nakajima, T Suemoto, K Matsumoto, M Goto, ...
Journal of the American Chemical Society 131 (3), 1170-1173, 2009
2732009
Hard magnetic ferrite with a gigantic coercivity and high frequency millimetre wave rotation
A Namai, M Yoshikiyo, K Yamada, S Sakurai, T Goto, T Yoshida, ...
Nature communications 3 (1), 1035, 2012
2402012
Zeta-Fe2O3 – A new stable polymorph in iron(III) oxide family
J Tuček, L Machala, S Ono, A Namai, M Yoshikiyo, K Imoto, H Tokoro, ...
Scientific reports 5 (1), 15091, 2015
1292015
Ultrafast time domain demonstration of bulk magnetization precession at zero magnetic field ferromagnetic resonance induced by terahertz magnetic field
M Nakajima, A Namai, S Ohkoshi, T Suemoto
Optics express 18 (17), 18260-18268, 2010
1202010
External stimulation-controllable heat-storage ceramics
H Tokoro, M Yoshikiyo, K Imoto, A Namai, T Nasu, K Nakagawa, N Ozaki, ...
Nature communications 6 (1), 7037, 2015
1142015
Nanometer-size hard magnetic ferrite exhibiting high optical-transparency and nonlinear optical-magnetoelectric effect
S Ohkoshi, A Namai, K Imoto, M Yoshikiyo, W Tarora, K Nakagawa, ...
Scientific reports 5 (1), 14414, 2015
1132015
Photoinduced Magnetization with a High Curie Temperature and a Large Coercive Field in a Co‐W Bimetallic Assembly
N Ozaki, H Tokoro, Y Hamada, A Namai, T Matsuda, S Kaneko, S Ohkoshi
Advanced Functional Materials 22 (10), 2089-2093, 2012
872012
A photoswitchable polar crystal that exhibits superionic conduction
S Ohkoshi, K Nakagawa, K Imoto, H Tokoro, Y Shibata, K Okamoto, ...
Nature Chemistry 12 (4), 338-344, 2020
802020
Study of the Electronic Structure and Magnetic Properties of ε-Fe2O3 by First-Principles Calculation and Molecular Orbital Calculations
M Yoshikiyo, K Yamada, A Namai, S Ohkoshi
The Journal of Physical Chemistry C 116 (15), 8688-8691, 2012
782012
The Origin of Ferromagnetism in ε-Fe2O3 and ε-GaxFe2−xO3 Nanomagnets
S Ohkoshi, A Namai, S Sakurai
The Journal of Physical Chemistry C 113 (26), 11235-11238, 2009
712009
Magnetic‐Pole Flip by Millimeter Wave
S Ohkoshi, M Yoshikiyo, K Imoto, K Nakagawa, A Namai, H Tokoro, ...
Advanced Materials 32 (48), 2004897, 2020
622020
Structural Phase Transition between γ-Ti3O5 and δ-Ti3O5 by Breaking of a One-Dimensionally Conducting Pathway
K Tanaka, T Nasu, Y Miyamoto, N Ozaki, S Tanaka, T Nagata, F Hakoe, ...
Crystal Growth & Design 15 (2), 653-657, 2015
622015
Rapid Faraday rotation on ε-iron oxide magnetic nanoparticles by visible and terahertz pulsed light
S Ohkoshi, K Imoto, A Namai, M Yoshikiyo, S Miyashita, H Qiu, S Kimoto, ...
Journal of the American Chemical Society 141 (4), 1775-1780, 2019
602019
High-frequency millimeter wave absorption of indium-substituted ε-Fe2O3 spherical nanoparticles
M Yoshikiyo, A Namai, M Nakajima, K Yamaguchi, T Suemoto, S Ohkoshi
Journal of Applied Physics 115 (17), 2014
582014
Large coercive field of 45 kOe in a magnetic film based on metal-substituted ε-iron oxide
S Ohkoshi, K Imoto, A Namai, S Anan, M Yoshikiyo, H Tokoro
Journal of the American Chemical Society 139 (38), 13268-13271, 2017
552017
Multimetal‐Substituted Epsilon‐Iron Oxide ϵ‐Ga0.31Ti0.05Co0.05Fe1.59O3 for Next‐Generation Magnetic Recording Tape in the Big‐Data Era
S Ohkoshi, A Namai, M Yoshikiyo, K Imoto, K Tamazaki, K Matsuno, ...
Angewandte Chemie 128 (38), 11575-11578, 2016
522016
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