Search Results - "Hono, K."

Strategy for high-coercivity Nd–Fe–B magnets by Hono, K., Sepehri-Amin, H.

“…The formation of continuous thin layers of a Nd-rich amorphous phase surrounding Nd2Fe14B grains is the key microstructural feature of high-coercivity Nd–Fe–B…”
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Prospect for HRE-free high coercivity Nd-Fe-B permanent magnets by Hono, K., Sepehri-Amin, H.

“…Recent state-of-the-art microstructure investigations on Nd-Fe-B sintered magnets have revealed that the Nd2Fe14B grains in conventional sintered magnets are…”
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Structure and chemical compositions of the grain boundary phase in Nd-Fe-B sintered magnets by Sasaki, T.T., Ohkubo, T., Hono, K.

“…We revisited the microstructure of a commercial Nd-Fe-B sintered magnet using scanning electron microscopy (SEM) and aberration corrected scanning transmission…”
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The mechanism of coercivity enhancement by the grain boundary diffusion process of Nd–Fe–B sintered magnets by Sepehri-Amin, H., Ohkubo, T., Hono, K.

“…We discuss the mechanism of the coercivity enhancement by the grain boundary diffusion process (GBDP) using Dy vapor based on detailed microstructural…”
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Grain boundary and interface chemistry of an Nd–Fe–B-based sintered magnet by Sepehri-Amin, H., Ohkubo, T., Shima, T., Hono, K.

“…The compositions of grain boundaries (GBs) and other interfaces surrounding Nd2Fe14B grains in commercial Nd–Fe–B sintered magnets have been investigated by…”
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Fabrication of a novel magnetic topological heterostructure and temperature evolution of its massive Dirac cone by Hirahara, T., Otrokov, M. M., Sasaki, T. T., Sumida, K., Tomohiro, Y., Kusaka, S., Okuyama, Y., Ichinokura, S., Kobayashi, M., Takeda, Y., Amemiya, K., Shirasawa, T., Ideta, S., Miyamoto, K., Tanaka, K., Kuroda, S., Okuda, T., Hono, K., Eremeev, S. V., Chulkov, E. V.

“…Materials that possess nontrivial topology and magnetism is known to exhibit exotic quantum phenomena such as the quantum anomalous Hall effect. Here, we…”
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Micromagnetic simulations on the grain size dependence of coercivity in anisotropic Nd–Fe–B sintered magnets by Sepehri-Amin, H., Ohkubo, T., Gruber, M., Schrefl, T., Hono, K.

“…Micromagnetic simulations of magnetization reversals of Nd–Fe–B anisotropic magnets with exchange-coupled grains demonstrate that the local demagnetization…”
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Magnetic refrigeration material operating at a full temperature range required for hydrogen liquefaction by Tang, Xin, Sepehri-Amin, H., Terada, N., Martin-Cid, A., Kurniawan, I., Kobayashi, S., Kotani, Y., Takeya, H., Lai, J., Matsushita, Y., Ohkubo, T., Miura, Y., Nakamura, T., Hono, K.

“…Magnetic refrigeration (MR) is a key technique for hydrogen liquefaction. Although the MR has ideally higher performance than the conventional gas compression…”
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Formation of non-ferromagnetic grain boundary phase in a Ga-doped Nd-rich Nd–Fe–B sintered magnet by Sasaki, T.T., Ohkubo, T., Takada, Y., Sato, T., Kato, A., Kaneko, Y., Hono, K.

“…We have characterized the microstructures of as-sintered and optimally post-sinter annealed Nd-rich Ga-doped Nd–Fe–B magnets by scanning electron microscopy…”
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Spin gapless semiconducting behavior in equiatomic quaternary CoFeMnSi Heusler alloy by Bainsla, Lakhan, Mallick, A. I., Raja, M. Manivel, Nigam, A. K., Varaprasad, B. S. D. Ch. S., Takahashi, Y. K., Alam, Aftab, Suresh, K. G., Hono, K.

“…In this paper, we report the signature of spin gapless semiconductor (SGS) in CoFeMnSi that belongs to the Heusler family. SGS is a new class of magnetic…”
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All-optical control of ferromagnetic thin films and nanostructures by Lambert, C-H., Mangin, S., Varaprasad, B. S. D. Ch. S., Takahashi, Y. K., Hehn, M., Cinchetti, M., Malinowski, G., Hono, K., Fainman, Y., Aeschlimann, M., Fullerton, E. E.

“…The interplay of light and magnetism allowed light to be used as a probe of magnetic materials. Now the focus has shifted to use polarized light to alter or…”
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Strong and ductile heat-treatable Mg–Sn–Zn–Al wrought alloys by Sasaki, T.T., Elsayed, F.R., Nakata, T., Ohkubo, T., Kamado, S., Hono, K.

“…[Display omitted] A newly developed Mg–Sn–Zn–Al based alloy shows substantial strengthening by artificial aging. A Na-doped Mg–5.4Sn–4.2Zn–2.0Al–0.2Mn–0.1Na…”
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High-coercivity ultrafine-grained anisotropic Nd–Fe–B magnets processed by hot deformation and the Nd–Cu grain boundary diffusion process by Sepehri-Amin, H., Ohkubo, T., Nagashima, S., Yano, M., Shoji, T., Kato, A., Schrefl, T., Hono, K.

“…The grain boundary diffusion process using an Nd70Cu30 eutectic alloy has been applied to hot-deformed anisotropic Nd–Fe–B magnets, resulting in a substantial…”
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Effect of Zn additions on the age-hardening of Mg–2.0Gd–1.2Y–0.2Zr alloys by Honma, T., Ohkubo, T., Kamado, S., Hono, K.

“…We have investigated the microstructures of age hardened Mg–2.0Gd–1.2Y– xZn–0.2Zr ( x = 0, 0.3, and 1.0) (at.%) alloys to understand the remarkable…”
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Effect of post-sinter annealing on the coercivity and microstructure of Nd–Fe–B permanent magnets by Li, W.F., Ohkubo, T., Hono, K.

“…To understand the mechanism of the increase in coercivity caused by post-sinter annealing of Nd–Fe–B-based magnets, we have investigated the microstructures of…”
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Towards the development of heat-treatable high-strength wrought Mg alloys by Hono, K., Mendis, C.L., Sasaki, T.T., Oh-ishi, K.

“…The potential to develop high-strength low-cost wrought Mg alloys through precipitation hardening is discussed with specific references to our recent studies…”
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Role of Ga on the high coercivity of Nd-rich Ga-doped Nd-Fe-B sintered magnet by Sasaki, T.T., Takada, Y., Okazaki, H., Ohkubo, T., Nakamura, T., Sato, T., Kato, A., Kaneko, Y., Hono, K.

“…We have investigated the effect of Ga on the microstructure and coercivity in Nd-rich Ga-doped Nd-Fe-B sintered magnets with different amount of Ga additions…”
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Role of Zn on the room temperature formability and strength in Mg–Al–Ca–Mn sheet alloys by Li, Z.H., Sasaki, T.T., Bian, M.Z., Nakata, T., Yoshida, Y., Kawabe, N., Kamado, S., Hono, K.

“…We clarified the role of Zn on the mechanical properties and texture evolution in Mg-1.2Al-0.5Ca-0.4Mn-xZn (wt.%, x = 0, 0.8 and 1.6) alloy sheets fabricated…”
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Solute segregation and precipitation in a creep-resistant Mg–Gd–Zn alloy by Nie, J.F., Oh-ishi, K., Gao, X., Hono, K.

“…Solute segregation and the precipitate phases in a creep-resistant Mg–1Gd–0.4Zn–0.2Zr (at.%) alloy aged isothermally at 250 and 200 °C have been examined using…”
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Mechanical alloying and amorphization in Cu–Nb–Ag in situ composite wires studied by transmission electron microscopy and atom probe tomography by Raabe, D., Ohsaki, S., Hono, K.

“…We have studied deformation-driven alloying in a Cu–5 at.% Ag–3 at.% Nb in situ composite by transmission electron microscopy and atom probe tomography. In…”
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