Naomichi Sakai

2022

Field-Trapping Performance of Drilled MgB₂Bulk Superconductor Embedded with Bi-In-Sn Alloy and Al-Rod Using Pulse-Field Magnetization Processes

Longji Dadiel, J., Sakai, N., Yokoyama, K., Takemura, K., Oka, T., Noudem, J., Muralidhar, M. & Murakami, M., 2022 6月 1, In: IEEE Transactions on Applied Superconductivity. 32, 4, 3800106.

研究成果: Article › 査読

Magnetic separation of nickel-plating waste liquid using a high temperature superconducting bulk magnet

Oka, T., Sudo, K., Dadiel, J. L., Sakai, N., Seki, H., Miryala, M., Murakami, M., Nakano, T., Ooizumi, M., Yokoyama, K. & Tsujimura, M., 2022 9月, In: Superconductor Science and Technology. 35, 9, 094006.

研究成果: Article › 査読

NMR Relaxometry Using Outer Field of Single-Sided HTS Bulk Magnet Activated by Pulsed Field

Takahashi, M., Kikuchi, S., Inoue, N., Sakai, N., Murakami, M., Yokoyama, K., Oka, T. & Nakamura, T., 2022 9月 1, In: IEEE Transactions on Applied Superconductivity. 32, 6, 4602404.

研究成果: Article › 査読

Novel ultra-sonic boron refinement in distilled water for cost-efficient fabrication of MgB₂ bulk ceramic superconductors

Arvapalli, S. S., Miryala, M., Sakai, N., Murakami, M. & Jirsa, M., 2022 10月 1, In: Ceramics International. 48, 19, p. 28102-28111 10 p.

研究成果: Article › 査読

Open Access

1 被引用数 (Scopus)

2021

(Gd,Y,Er)Ba₂Cu₃O_y bulk superconducting system processed via infiltration growth

Pinmangkorn, S., Miryala, M., Arvapalli, S. S., Jirsa, M., Oka, T., Sakai, N. & Murakami, M., 2021 11月 10, In: Journal of Alloys and Compounds. 881, 160535.

研究成果: Article › 査読

Open Access

2 被引用数 (Scopus)

Complex pulse magnetization process and mechanical properties of spark plasma sintered bulk MgB₂

Miryala, M., Arvapalli, S. S., Sakai, N., Murakami, M., Mochizuki, H., Naito, T., Fujshiro, H., Jirsa, M., Murakami, A. & Noudem, J., 2021 11月, In: Materials Science and Engineering B: Solid-State Materials for Advanced Technology. 273, 115390.

研究成果: Article › 査読

Open Access

2 被引用数 (Scopus)

Feasible waste liquid treatment from electroless nickel-plating by intense magnetic field of HTS bulk magnets

Oka, T., Furusawa, M., Sudo, K., Dadiel, L., Sakai, N., Seki, H., Miryala, M., Murakami, M., Nakano, T., Ooizumi, M., Yokoyama, K. & Tsujimura, M., 2021, In: Progress in Superconductivity and Cryogenics (PSAC). 23, 3, p. 37-40 4 p.

研究成果: Article › 査読

1 被引用数 (Scopus)

Pinning behavior in bulk MgB₂ prepared using boron powder refined via high-energy ultra-sonication

Arvapalli, S. S., Miryala, M., Jirsa, M., Sakai, N. & Murakami, M., 2021 5月, In: Journal of Superconductivity and Novel Magnetism. 34, 5, p. 1297-1301 5 p.

研究成果: Article › 査読

Open Access

5 被引用数 (Scopus)

Review on the use of superconducting bulks for magnetic screening in electrical machines for aircraft applications

Dorget, R., Nouailhetas, Q., Colle, A., Berger, K., Sudo, K., Ayat, S., Lêvêque, J., Koblischka, M. R., Sakai, N., Oka, T. & Douine, B., 2021 6月 1, In: Materials. 14, 11, 2847.

研究成果: Article › 査読

Open Access

9 被引用数 (Scopus)

Synthesis of dense MgB₂ superconductor via in situ and Ex situ spark plasma sintering method

Dadiel, J. L., Naik, S. P. K., Pęczkowski, P., Sugiyama, J., Ogino, H., Sakai, N., Kazuya, Y., Warski, T., Wojcik, A., Oka, T. & Murakami, M., 2021 12月 1, In: Materials. 14, 23, 7395.

研究成果: Article › 査読

Open Access

5 被引用数 (Scopus)

Top-seeded infiltration growth processing of single grain (Gd, Dy)BaCuO superconductors: Nano Nb₂O₅ doping, enhancement of trapped field and superconducting performance

Pavan Kumar Naik, S., Pęczkowski, P., Ogino, H., Muralidhar, M., Sakai, N., Oka, T., Nishio, T. & Murakami, M., 2021 11月 1, In: Materials Chemistry and Physics. 272, 124954.

研究成果: Article › 査読

1 被引用数 (Scopus)

2020

Formation of uniform magnetic flux distribution for NMR magnets using HTS bulk magnets activated by pulsed-field magnetization

Oka, T., Inoue, N., Tsunoda, S., Ogawa, J., Fukui, S., Yokoyama, K., Sakai, N., Miryala, M., Murakami, M., Takahashi, M. & Nakamura, T., 2020 5月, In: Materials Research Express. 7, 5, 056001.

研究成果: Article › 査読

Open Access

2 被引用数 (Scopus)

Magnetizing Technique for Permanent Magnets in IPM Motor Rotors Using HTS Bulk Magnet

Oka, T., Hasebe, S., Ogawa, J., Fukui, S., Nakano, T., Yokoyama, K., Miryala, M., Sakai, N. & Murakami, M., 2020 6月, In: IEEE Transactions on Applied Superconductivity. 30, 4, 9072631.

研究成果: Article › 査読

4 被引用数 (Scopus)

Novel magnetizing technique using high temperature superconducting bulk magnets for permanent magnets in interior permanent magnet rotors

Oka, T., Hasebe, S., Ogawa, J., Fukui, S., Nakano, T., Sakai, N., Miryala, M., Murakami, M. & Yokoyama, K., 2020 8月, In: Superconductor Science and Technology. 33, 8, 084003.

研究成果: Article › 査読

2 被引用数 (Scopus)

Optimization of Carbon Encapsulated Boron Doping for High-Performance Bulk Sintered MgB₂

Sai Srikanth, A., Muralidhar, M., Sunsanee, P., Jirsa, M., Sakai, N., Oka, T. & Murakami, M., 2020 11月, In: Advanced Engineering Materials. 22, 11, 2000478.

研究成果: Article › 査読

Open Access

5 被引用数 (Scopus)

Recent progress in production of infiltration-growth and melt-growth processed bulk (RE)Ba₂Cu₃O_y

Muralidhar, M., Sunsanee, P., Takemura, K., Sai Srikanth, A., Jirsa, M., Ramachandra Rao, M. S., Oka, T., Sakai, N. & Murakami, M., 2020 7月, In: Superconductor Science and Technology. 33, 7, 074002.

研究成果: Article › 査読

Open Access

2 被引用数 (Scopus)

2019

Study on Magnetic Flux Dissipation and Field-Trapping Performance of HTS Bulk-Shaped Magnesium Diboride in Pulse-Field Magnetizing Processes

Oka, T., Takeda, A., Oki, H., Ogawa, J., Fukui, S., Scheiter, J., Häßler, W., Yokoyama, K., Yamanaka, K., Dadiel, L., Miryala, M., Sakai, N., Murakami, M. & Noudem, J., 2019 8月, In: IEEE Transactions on Applied Superconductivity. 29, 5, 8678817.

研究成果: Article › 査読

4 被引用数 (Scopus)

2014

Progress in R&D of coated conductor in M-PACC project

Izumi, T., Ibi, A., Nakaoka, K., Taneda, T., Yoshida, T., Takagi, Y., Nakamura, T., Machi, T., Katayama, K., Sakai, N., Yoshizumi, M., Koizumi, T., Kimura, K., Kato, T., Kiss, T. & Shiohara, Y., 2014, In: Progress in Superconductivity and Cryogenics (PSAC). 16, 2, p. 1-6 6 p.

研究成果: Article › 査読

Open Access

1 被引用数 (Scopus)

2011

Delamination behavior of Gd123 coated conductor fabricated by PLD

Sakai, N., Lee, S., Chikumoto, N., Izumi, T. & Tanabe, K., 2011 11月, In: Physica C: Superconductivity and its applications. 471, 21-22, p. 1075-1079 5 p.

研究成果: Article › 査読

27 被引用数 (Scopus)

Investigation of three-dimensional current distribution at silver diffusion joint of RE-123 coated conductors based on magnetic microscopy combined with finite element method

Higashikawa, K., Honda, Y., Inoue, M., Kiss, T., Chikumoto, N., Sakai, N., Izumi, T. & Okamoto, H., 2011 6月, In: IEEE Transactions on Applied Superconductivity. 21, 3 PART 3, p. 3403-3407 5 p., 5677565.

研究成果: Article › 査読

8 被引用数 (Scopus)

2009

Flux pinning properties in a GdBa₂Cu₃O _7-δ bulk superconductor with the addition of magnetic alloy particles

Xu, Y., Izumi, M., Tsuzuki, K., Zhang, Y., Xu, C., Murakami, M., Sakai, N. & Hirabayashi, I., 2009, In: Superconductor Science and Technology. 22, 9, 095009.

研究成果: Article › 査読

48 被引用数 (Scopus)

Observation of record flux pinning in melt-textured NEG-123 superconductor doped by Nb, Mo, and Ti nanoparticles

Muralidhar, M., Tomita, M., Jirsa, M., Sakai, N., Murakami, M. & Hirabayashi, I., 2009 10月 15, In: Physica C: Superconductivity and its applications. 469, 15-20, p. 1196-1199 4 p.

研究成果: Article › 査読

7 被引用数 (Scopus)

Position feedback control using magneto impedance sensors on conveyor with superconducting magnetic levitation

Iizuka, T., Sakai, N. & Fujita, H., 2009 3月 16, In: Sensors and Actuators, A: Physical. 150, 1, p. 110-115 6 p.

研究成果: Article › 査読

12 被引用数 (Scopus)

Pulsed field magnetization for GdBaCuO bulk with stronger pinning characteristics

Fujishiro, H., Hiyama, T., Miura, T., Naito, T., Nariki, S., Sakai, N. & Hirabayashi, I., 2009 6月, In: IEEE Transactions on Applied Superconductivity. 19, 3, p. 3545-3548 4 p., 5067107.

研究成果: Article › 査読

30 被引用数 (Scopus)

Solid phase (RE ₂BaO ₄)-Liquid phase (BaCuO ₂) reaction: The way to highly oriented ErBa ₂Cu ₃O _y superconducting thick films on commercial silver substrates

Muralidhar, M., Sakai, N., Jirsa, M. & Tanaka, S., 2009 5月 6, In: Crystal Growth and Design. 9, 5, p. 2404-2408 5 p.

研究成果: Article › 査読

3 被引用数 (Scopus)

Study of HTS bulk current lead with metal alloy impregnation under vacuum

Tsuzuki, K., Sugyo, D., Kimura, Y., Izumi, M., Sakai, N., Miki, M. & Hayakawa, H., 2009 6月, In: IEEE Transactions on Applied Superconductivity. 19, 3, p. 2214-2217 4 p., 5109557.

研究成果: Article › 査読

2 被引用数 (Scopus)

Superconducting magnetic bearing for a flywheel energy storage system using superconducting coils and bulk superconductors

Nagashima, K., Seino, H., Sakai, N. & Murakami, M., 2009 10月 15, In: Physica C: Superconductivity and its applications. 469, 15-20, p. 1244-1249 6 p.

研究成果: Article › 査読

35 被引用数 (Scopus)

Transmission Electron microscopy and atomic force microscopy observation of air-processed GdBa₂Cu₃O_7-δ superconductors doped with metal oxide nanoparticles (Metal = Zr, Zn, and Sn)

Xu, C., Hu, A., Ichihara, M., Izumi, M., Xu, Y., Sakai, N. & Hirabayashi, I., 2009 2月, In: Japanese Journal of Applied Physics. 48, 2, 023002.

研究成果: Article › 査読

13 被引用数 (Scopus)

2008

A study on levitation force and its time relaxation behavior for a bulk superconductor-magnet system

Suzuki, T., Araki, S., Koibuchi, K., Ogawa, K., Sawa, K., Takeuchi, K., Murakami, M., Nagashima, K., Seino, H., Miyazaki, Y., Sakai, N., Hirabayashi, I. & Iwasa, Y., 2008 9月 15, In: Physica C: Superconductivity and its applications. 468, 15-20, p. 1461-1464 4 p.

研究成果: Article › 査読

18 被引用数 (Scopus)

Current progress in ternary LREBa₂Cu₃O_y materials and their application

Muralidhar, M., Jirsa, M., Sakai, N., Murakami, M. & Hirabayashi, I., 2008 6月 15, In: Materials Science and Engineering B: Solid-State Materials for Advanced Technology. 151, 1, p. 90-94 5 p.

研究成果: Article › 査読

8 被引用数 (Scopus)

Diffusion joint using silver layer of YBCO coated conductors for applications

Kato, J., Sakai, N., Miyata, S., Ibi, A., Sutoh, Y., Yamada, Y., Chikumoto, N., Nakao, K., Izumi, T. & Shiohara, Y., 2008 9月 15, In: Physica C: Superconductivity and its applications. 468, 15-20, p. 1571-1574 4 p.

研究成果: Article › 査読

22 被引用数 (Scopus)

Effect of ZrO₂ and ZnO nanoparticles inclusions on superconductive properties of the melt-processed GdBa₂Cu₃O_7-δ bulk superconductor

Xu, Y., Hu, A., Xu, C., Sakai, N., Hirabayashi, I. & Izumi, M., 2008 9月 15, In: Physica C: Superconductivity and its applications. 468, 15-20, p. 1363-1365 3 p.

研究成果: Article › 査読

26 被引用数 (Scopus)

Fabrication of large Eu-Ba-Cu-O bulk superconductors for compact NMR magnet

Nariki, S., Sakai, N., Hirabayashi, I., Yoshikawa, M., Itoh, Y., Nakamura, T. & Utsumi, H., 2008 2月 1, In: Journal of Physics: Conference Series. 97, 1, 012238.

研究成果: Article › 査読

Open Access

4 被引用数 (Scopus)

Force density of magnetic bearings using superconducting coils and bulk superconductors

Nagashima, K., Seino, H., Miyazaki, Y., Arai, Y., Sakai, N. & Murakami, M., 2008 5月, In: Quarterly Report of RTRI (Railway Technical Research Institute) (Japan). 49, 2, p. 127-132 6 p.

研究成果: Article › 査読

13 被引用数 (Scopus)

Homogenizing field-trapping capabilities of bulk Y-Ba-Cu-O superconductors fabricated using Ba-Cu-O oxide substrates for practical applications

Matsui, M., Tsuji, N., Nariki, S., Sakai, N., Iwafuchi, K. & Murakami, M., 2008 4月 1, In: Superconductor Science and Technology. 21, 4, 045012.

研究成果: Article › 査読

1 被引用数 (Scopus)

Homogenizing field-trapping capabilities of bulk Y-Ba-Cu-O superconductors using Ba-Cu-O oxide substrate for practical applications

Matsui, M., Tsuji, N., Nariki, S., Sakai, N., Iwafuchi, K. & Murakami, M., 2008 2月 1, In: Journal of Physics: Conference Series. 97, 1, 012001.

研究成果: Article › 査読

Materials processing, pulsed field magnetization and field-pole application to propulsion motors on Gd123 bulk superconductors

Izumi, M., Xu, C., Hu, A., Ichihara, M., Xu, Y., Morita, E., Kimura, Y., Murakami, M., Sakai, N., Hirabayashi, I., Sugimoto, H. & Miki, M., 2008 2月 1, In: Journal of Physics: Conference Series. 97, 1, 012299.

研究成果: Article › 査読

4 被引用数 (Scopus)

New method of synthesis and physical properties of thick superconducting Er-123 films

Muralidhar, M., Sakai, N., Machi, T., Miyajiri, T., Hirabayashi, I. & Tanaka, S., 2008 9月 15, In: Physica C: Superconductivity and its applications. 468, 15-20, p. 1345-1349 5 p.

研究成果: Article › 査読

Optimum processing conditions for the fabrication of large, single grain Ag-doped YBCO bulk superconductors

Iida, K., Babu, N. H., Pathak, S., Shi, Y., Yeoh, W. K., Miyazaki, T., Sakai, N., Murakami, M. & Cardwell, D. A., 2008 6月 15, In: Materials Science and Engineering B: Solid-State Materials for Advanced Technology. 151, 1, p. 2-6 5 p.

研究成果: Article › 査読

5 被引用数 (Scopus)

Practical technique of pulsed field magnetization for bulk HTS application

Kimura, Y., Yamaguchi, K., Sano, T., Sugyo, D., Izumi, M., Ida, T., Nariki, S., Sakai, N., Hirabayashi, I. & Miki, M., 2008 2月 1, In: Journal of Physics: Conference Series. 97, 1, 012295.

研究成果: Article › 査読

Open Access

9 被引用数 (Scopus)

Preparation and properties of Eu-Ba-Cu-O superconducting bulk magnets for NMR application

Nariki, S., Sakai, N., Hirabayashi, I., Yoshikawa, M., Itoh, Y., Nakamura, T. & Utumi, H., 2008 9月 15, In: Physica C: Superconductivity and its applications. 468, 15-20, p. 1451-1455 5 p.

研究成果: Article › 査読

5 被引用数 (Scopus)

Pulsed field magnetization properties for a large single-grain Gd-Ba-Cu-O high-temperature superconductor bulk with a diameter of 140 mm by using a new type of pulsed copper split coil

Yamaguchi, K., Kimura, Y., Izumi, M., Nariki, S., Sakai, N. & Hirabayashi, I., 2008 2月 1, In: Journal of Physics: Conference Series. 97, 1, 012278.

研究成果: Article › 査読

Open Access

13 被引用数 (Scopus)

Quenching characteristics of electrical contacts using YBaCuO bulk superconductor

Fukuda, K., Fujita, H., Ogawa, K., Tomita, M., Murakami, M., Sakai, N., Hirabayashi, I. & Sawa, K., 2008 9月 15, In: Physica C: Superconductivity and its applications. 468, 15-20, p. 1465-1468 4 p.

研究成果: Article › 査読

1 被引用数 (Scopus)

Record flux pinning in melt-textured NEG-123 doped by Mo and Nb nanoparticles

Muralidhar, M., Sakai, N., Jirsa, M., Murakami, M. & Hirabayashi, I., 2008, In: Applied Physics Letters. 92, 16, 162512.

研究成果: Article › 査読

56 被引用数 (Scopus)

Single domain YBCO/Ag bulk superconductors fabricated by seeded infiltration and growth

Iida, K., Babu, N. H., Shi, Y., Miyazaki, T., Sakai, N., Murakami, M. & Cardwell, D. A., 2008 2月 1, In: Journal of Physics: Conference Series. 97, 1, 012105.

研究成果: Article › 査読

7 被引用数 (Scopus)

The microstructure and properties of single grain bulk Ag-doped Y-Ba-Cu-O fabricated by seeded infiltration and growth

Iida, K., Babu, N. H., Shi, Y., Pathak, S. K., Yeoh, W. K., Miyazaki, T., Sakai, N., Murakami, M. & Cardwell, D. A., 2008 9月 15, In: Physica C: Superconductivity and its applications. 468, 15-20, p. 1387-1390 4 p.

研究成果: Article › 査読

9 被引用数 (Scopus)

Thick REBaCuO films for power applications planted on silver tapes

Muralidhar, M., Sakai, N., MacHi, T., Hirabayashi, I. & Tanaka, S., 2008 2月 1, In: Journal of Physics: Conference Series. 97, 1, 012145.

研究成果: Article › 査読

1 被引用数 (Scopus)

2007

An effect of interface condition on electrical contact characteristics using Y-Ba-Cu-O bulk superconductor

Fujita, H., Fukuda, K., Tomita, M., Murakami, M., Sakai, N., Hirabayashi, I. & Sawa, K., 2007 10月 1, In: Physica C: Superconductivity and its applications. 463-465, SUPPL., p. 415-419 5 p.

研究成果: Article › 査読

1 被引用数 (Scopus)

Electrical contact characteristics of YBaCuO bulk

Fukuda, K., Fujita, H., Tomita, M., Murakami, M., Sakai, N., Hirabayashi, I. & Sawa, K., 2007 10月 1, In: Physica C: Superconductivity and its applications. 463-465, SUPPL., p. 1361-1364 4 p.

研究成果: Article › 査読

1 被引用数 (Scopus)

Enhanced flux pinning in GdBaCuO bulk superconductors by Zr dopants

Xu, C., Hu, A., Ichihara, M., Sakai, N., Izumi, M. & Hirabayashi, I., 2007 10月 1, In: Physica C: Superconductivity and its applications. 463-465, SUPPL., p. 367-370 4 p.

研究成果: Article › 査読

2 被引用数 (Scopus)

坂井 直道

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