Zobrazeno 1 - 10
of 73
pro vyhledávání: '"Yamamoto, Takafumi D."'
Stable Tsai-type quinary 1/1 and 2/1 approximant crystals (ACs) with chemical compositions Au56.25Al10Cu7In13Tb13.75 and Au55.5Al10Cu7In13Tb14.5, respectively, exhibiting ferromagnetic (FM) long-range orders were successfully synthesized and studied
Externí odkaz:
http://arxiv.org/abs/2310.14292
Autor:
Terashima, Kensei, de Castro, Pedro Baptista, Saito, Akiko T, Yamamoto, Takafumi D, Matsumoto, Ryo, Takeya, Hiroyuki, Takano, Yoshihiko
Publikováno v:
Science and Technology of Advanced Materials: Methods 3:1, 2217474 (2023)
Stimulated by a recent report of a giant magnetocaloric effect in HoB$_2$ found via machine-learning predictions, we have explored the magnetocaloric properties of a related compound ErB$_2$, that has remained the last ferromagnetic material among th
Externí odkaz:
http://arxiv.org/abs/2306.15153
Autor:
Yamamoto, Takafumi D., Saito, Akiko T., Takeya, Hiroyuki, Terashima, Kensei, Numazawa, Takenori, Takano, Yoshihiko
Publikováno v:
J. Alloys Compd. 935, 168040 (2023)
Processing magnetocaloric materials into magnetic refrigerants with appropriate shapes is essential for the development of magnetic refrigeration systems. In this context, the impact of processing on the physical properties of magnetocaloric material
Externí odkaz:
http://arxiv.org/abs/2211.08069
Autor:
Yamamoto, Takafumi D., de Castro, Pedro Baptista, Terashima, Kensei, Saito, Akiko T., Takeya, Hiroyuki, Takano, Yoshihiko
Publikováno v:
J. Magn. Magn. Mater. 562 (2022) 169801
We investigate the magnetic, thermal, and magnetocaloric properties of the intermetallic HoAl$_{3}$ compounds with two different crystal structures. The room-temperature equilibrium trigonal phase HoAl$_{3}$ undergoes an antiferromagnetic (AFM) trans
Externí odkaz:
http://arxiv.org/abs/2208.04027
Autor:
Terashima, Kensei, de Castro, Pedro Baptista, Echevarria, Miren Garbiñe Esparza, Matsumoto, Ryo, Yamamoto, Takafumi D, Saito, Akiko T, Takeya, Hiroyuki, Takano, Yoshihiko
Publikováno v:
Digital Discovery, Advance article (2023)
For performing successful measurements within limited experimental time, efficient use of preliminary data plays a crucial role. This work shows that a simple feedforward type neural networks approach for learning preliminary experimental data can pr
Externí odkaz:
http://arxiv.org/abs/2206.10908
Autor:
Yamamoto, Takafumi D., Hiroyuki, Takeya, de Castro, Pedro Baptista, Saito, Akiko T., Terashima, Kensei, Numazawa, Takenori, Takano, Yoshihiko
Publikováno v:
IEEE Transactions on Magnetics 58 (2022) 2501406
We fabricate gas-atomized particles by inductively melting electrode rods of HoB2-x (x = -0.3, 0, 0.3, and 1.0) and investigate the effect of non-stoichiometry on the phase fraction, microstructure, and physical properties. Shifting the stoichiometri
Externí odkaz:
http://arxiv.org/abs/2205.13141
Autor:
Yamamoto, Takafumi D., Takeya, Hiroyuki, Saito, Akiko T., Terashima, Kensei, Numazawa, Takenori, Takano, Yoshihiko
Publikováno v:
J. Magn. Magn. Mater. 547 (2022) 168906
Processing magnetocaloric materials into magnetic refrigerant particles is an essential issue in developing high-performance magnetic refrigerators. Here, we succeed in stably producing magnetocaloric particles of the promising material HoAl2 by a ne
Externí odkaz:
http://arxiv.org/abs/2204.11480
Autor:
Yamamoto, Takafumi D., Takeya, Hiroyuki, Saito, Akiko T., Terashima, Kensei, de Castro, Pedro Baptista, Numazawa, Takenori, Takano, Yoshihiko
Publikováno v:
Applied Physics A 127, 301 (2021)
The processing of promising magnetocaloric materials into spheres is one of the important issues on developing high-performance magnetic refrigeration systems. In the present study, we achieved in producing spherical particles of a giant magnetocalor
Externí odkaz:
http://arxiv.org/abs/2204.10711
Autor:
Yamamoto, Takafumi D., Takeya, Hiroyuki, Terashima, Kensei, Iwasaki, Suguru, de Castro, Pedro Baptista, Numazawa, Takenori, Takano, Yoshihiko
Publikováno v:
Journal of Magnetism and Magnetic Materials 513 (2020) 167207
We report the adiabatic temperature change in ErAl2 magnetocaloric wires fabricated by a powder-in-tube (PIT) process. The adiabatic temperature change of the PIT wires is found to be determined by not only the volume fraction of ErAl2 core but also
Externí odkaz:
http://arxiv.org/abs/2204.09240
Autor:
Matsumoto, Ryo, Terashima, Kensei, Nakano, Satoshi, Nakamura, Kazuki, Yamamoto, Sayaka, Yamamoto, Takafumi D., Ishikawa, Takahiro, Adachi, Shintaro, Irifune, Tetsuo, Imai, Motoharu, Takano, Yoshihiko
High-pressure techniques open exploration of functional materials in broad research fields. An established diamond anvil cell with a boron-doped diamond heater and transport measurement terminals has performed the high-pressure synthesis of a cubic S
Externí odkaz:
http://arxiv.org/abs/2202.07103