Tetsuo Oka

Specially Appointed Professor

  • 2002 Citations
  • 23 h-Index
1990 …2020

Research output per year

If you made any changes in Pure these will be visible here soon.

Research Output

Filter
Conference article
2020

Investigation of flux jumps during pulsed field magnetization in graphene-Added MgB2 bulks

Yokoyama, K., Oka, T., Berger, K., Dorget, R., Koblischka, M., Grigoroscuta, M., Burdusel, M., Batalu, D., Aldica, G., Badica, P., Sakai, N., Muralidhar, M. & Murakami, M., 2020 Jun 19, In : Journal of Physics: Conference Series. 1559, 1, 012080.

Research output: Contribution to journalConference article

Open Access

Magnetic Flux Trapping and Flux Jumps in Pulsed Field Magnetizing Processes in REBCO and Mg-B Bulk Magnets

Oka, T., Takeda, A., Oki, H., Yamanaka, K., Dadiel, L., Yokoyama, K., Häßler, W., Scheiter, J., Sakai, N. & Murakami, M., 2020 Jul 31, In : Journal of Physics: Conference Series. 1590, 1, 012025.

Research output: Contribution to journalConference article

Open Access

Magnetizing characteristic evaluation of REBCO bulk in PFM using different yokes

Yokoyama, K. & Oka, T., 2020 Jun 19, In : Journal of Physics: Conference Series. 1559, 1, 012047.

Research output: Contribution to journalConference article

Open Access

Occurrence of Flux Jumps in MgB2 Bulk Magnets during Pulse-Field Magnetization

Sakai, N., Oka, T., Yamanaka, K., Dadiel, L., Oki, H., Ogawa, J., Fukui, S., Scheiter, J., Häßler, W., Yokoyama, K., Noudem, J., Miryala, M. & Murakami, M., 2020 Jun 19, In : Journal of Physics: Conference Series. 1559, 1, 012024.

Research output: Contribution to journalConference article

Open Access
2019

Generation of Uniform Magnetic Field between Face-to-Face HTS Bulk Magnets

Oka, T., Higa, K., Tsunoda, S., Ogawa, J., Fukui, S., Inoue, N., Miryala, M., Murakami, M., Yokoyama, K. & Nakamura, T., 2019 Oct 15, In : Journal of Physics: Conference Series. 1293, 1, 012044.

Research output: Contribution to journalConference article

Open Access
1 Citation (Scopus)

Improvement of the trapped field of REBCO bulk activated by pulsed field magnetization with a large soft-iron yoke

Yokoyama, K. & Oka, T., 2019 Oct 15, In : Journal of Physics: Conference Series. 1293, 1, 012046.

Research output: Contribution to journalConference article

Open Access
2018

Collecting Ni-Sulfate Compound from Electroless Plating Waste by Magnetic Separation Technique with Use of HTS Bulk Magnets

Oka, T., Sasaki, S., Sasaki, H., Fukui, S., Ogawa, J., Sato, T., Nakano, T., Ooizumi, M., Tsujimura, M. & Yokoyama, K., 2018 Jul 26, In : Journal of Physics: Conference Series. 1054, 1, 012047.

Research output: Contribution to journalConference article

Comparison of Trapped Field Characteristic of Bulk Magnet System Using Various Type Refrigerators

Yokoyama, K., Katsuki, A., Miura, A. & Oka, T., 2018 Jul 26, In : Journal of Physics: Conference Series. 1054, 1, 012072.

Research output: Contribution to journalConference article

1 Citation (Scopus)
2017

Influence of Artificial Defects on Trapped Field Performance in a Superconducting Bulk Magnet

Yokoyama, K., Eranda, K., Zhao, Y., Katsuki, A., Miura, A. & Oka, T., 2017 Jul 26, In : Journal of Physics: Conference Series. 871, 1, 012050.

Research output: Contribution to journalConference article

1 Citation (Scopus)

Magnetic flux invasion in REBCO bulk magnets with varying pre-magnetized flux distributions in multiple-PFM processes

Oka, T., Hara, K., Takeda, A., Ogawa, J., Fukui, S., Sato, T., Yokoyama, K. & Murakami, A., 2017 Jul 26, In : Journal of Physics: Conference Series. 871, 1, 012049.

Research output: Contribution to journalConference article

1 Citation (Scopus)

Magnetic Separation Using HTS Bulk Magnet for Cs-Bearing Fe precipitates

Oka, T., Ichiju, K., Sasaki, S., Ogawa, J., Fukui, S., Sato, T., Ooizumi, M., Yokoyama, K., Aoki, S. & Ohnishi, N., 2017 Sep 21, In : Journal of Physics: Conference Series. 897, 1, 012024.

Research output: Contribution to journalConference article

1 Citation (Scopus)
2016

Uniform Magnetic Field between Face-to-Face HTS Bulk Magnets Combining Concave and Convex Magnetic Field Distributions

Oka, T., Takahashi, Y., Yaginuma, S., Ogawa, J., Fukui, S., Sato, T., Yokoyama, K. & Nakamura, T., 2016 Jan 1, In : Physics Procedia. 81, p. 45-48 4 p.

Research output: Contribution to journalConference article

5 Citations (Scopus)
2015

Attempt to generate a strong and uniform magnetic field by face-to-face HTS bulk elements in a magnet system

Oka, T., Hirayama, E., Takahashi, Y., Kanai, T., Ogawa, J., Fukui, S., Sato, T., Yokoyama, K. & Nakamura, T., 2015 Jan 1, In : Physics Procedia. 67, p. 1005-1009 5 p.

Research output: Contribution to journalConference article

4 Citations (Scopus)
2014

Magnetic flux-trapping of anisotropic-grown Y-Ba-Cu-O bulk superconductors during and after pulsed-field magnetizing processes

Oka, T., Yamada, Y., Horiuchi, T., Ogawa, J., Fukui, S., Sato, T., Yokoyama, K. & Langer, M., 2014, In : Journal of Physics: Conference Series. 507, PART 1, 012039.

Research output: Contribution to journalConference article

4 Citations (Scopus)
2013

Experimental verification of the magnetic flux penetration property and flux flow inhibition effect of a superconducting bulk magnet with small holes

Yokoyama, K., Oka, T., Kondo, N. & Hosaka, S., 2013 Jan 1, In : Physics Procedia. 45, p. 261-264 4 p.

Research output: Contribution to journalConference article

3 Citations (Scopus)

Investigation of the Flux Flow-inhibiting Effect of a Hole-opened Superconducting Bulk Magnet

Yokoyama, K., Tsukui, T., Mita, H., Tsubonoya, N. & Oka, T., 2013 Jan 1, In : Physics Procedia. 58, p. 302-305 4 p.

Research output: Contribution to journalConference article

Open Access

Pulsed-field Invasion to HTS Bulk Magnets Grown from Two Seeds with Varied Seed-crystal Positions and Numbers

Oka, T., Yamada, Y., Horiuchi, T., Ogawa, J., Fukui, S., Sato, T., Yokoyama, K. & Langer, M., 2013 Jan 1, In : Physics Procedia. 58, p. 74-77 4 p.

Research output: Contribution to journalConference article

Open Access
2 Citations (Scopus)
2012

Field trapping property of HTS bulk magnet with reduced voids in pulsed field magnetizing process

Oka, T., Seki, H., Ishiduka, D., Ogawa, J., Fukui, S., Sato, T., Yokoyama, K. & Murakami, A., 2012 Jan 1, In : Journal of Physics: Conference Series. 400, PART 2, 022089.

Research output: Contribution to journalConference article

5 Citations (Scopus)
2005

Approach from temperature measurement to trapped field enhancement in HTSC bulks by pulse field magnetizing

Fujishiro, H., Yokoyama, K., Kaneyama, M., Ikebe, M., Oka, T. & Noto, K., 2005 Oct 1, In : Physica C: Superconductivity and its applications. 426-431, I, p. 594-601 8 p.

Research output: Contribution to journalConference article

6 Citations (Scopus)

Generation of strong magnetic field using 60 mmφ superconducting bulk magnet and its application to magnetron sputtering device

Yanagi, Y., Matsuda, T., Hazama, H., Yokouchi, K., Yoshikawa, M., Itoh, Y., Oka, T., Ikuta, H. & Mizutani, U., 2005 Oct 1, In : Physica C: Superconductivity and its applications. 426-431, I, p. 764-769 6 p.

Research output: Contribution to journalConference article

33 Citations (Scopus)

Temperature changes in a melt-processed YBCO superconductor activated by field cooling magnetizing process

Oka, T., Yokoyama, K., Fujishiro, H., Kaneyama, M. & Noto, K., 2005 Oct 1, In : Physica C: Superconductivity and its applications. 426-431, I, p. 794-799 6 p.

Research output: Contribution to journalConference article

11 Citations (Scopus)

Temperature rise and trapped field in a GdBaCuO bulk superconductor cooled down to 10 K after applying pulsed magnetic field

Yokoyama, K., Kaneyama, M., Fujishiro, H., Oka, T. & Noto, K., 2005 Oct 1, In : Physica C: Superconductivity and its applications. 426-431, I, p. 671-675 5 p.

Research output: Contribution to journalConference article

11 Citations (Scopus)
2003

A 3 T magnetic field generator using melt-processed bulk superconductors as trapped field magnets and its applications

Oka, T., Yokoyama, K., Itoh, Y., Yanagi, Y., Yoshikawa, M., Ikuta, H., Mizutani, U., Okada, H. & Noto, K., 2003 Oct 1, In : Physica C: Superconductivity and its applications. 392-396, PART 1, p. 709-712 4 p.

Research output: Contribution to journalConference article

15 Citations (Scopus)

Construction of a strong magnetic field generator with use of melt-processed bulk superconductors

Oka, T., Yokoyama, K., Itoh, Y., Ikuta, H., Mizutani, U., Okada, H., Katagiri, K. & Noto, K., 2003 Jun 1, In : IEEE Transactions on Applied Superconductivity. 13, 2 II, p. 1584-1587 4 p.

Research output: Contribution to journalConference article

13 Citations (Scopus)

High gradient magnetic separation using superconducting bulk magnets

Yokoyama, K., Oka, T., Okada, H. & Noto, K., 2003 Oct 1, In : Physica C: Superconductivity and its applications. 392-396, PART 1, p. 739-744 6 p.

Research output: Contribution to journalConference article

30 Citations (Scopus)

Solid-liquid magnetic separation using bulk superconducting magnets

Yokoyama, K., Oka, T., Okada, H., Fujine, Y., Chiba, A. & Noto, K., 2003 Jun 1, In : IEEE Transactions on Applied Superconductivity. 13, 2 II, p. 1592-1595 4 p.

Research output: Contribution to journalConference article

40 Citations (Scopus)

Thermal and mechanical properties of high Tc bulk superconductors and their applications

Noto, K., Oka, T., Yokoyama, K., Katagiri, K., Fujishiro, H., Okada, H., Nakazawa, H., Muralidhar, M. & Murakami, M., 2003 Oct 1, In : Physica C: Superconductivity and its applications. 392-396, PART 1, p. 677-683 7 p.

Research output: Contribution to journalConference article

16 Citations (Scopus)
2001

Melt-processed RE-Ba-Cu-O (RE=Sm, Nd) superconductors for quasi-permanent magnets

Ikuta, H., Hosokawa, T., Ishihara, H., Yoshikawa, M., Yanagi, Y., Itoh, Y., Oka, T. & Mizutani, U., 2001 Mar 1, In : IEEE Transactions on Applied Superconductivity. 11, 1 III, p. 3716-3719 4 p.

Research output: Contribution to journalConference article

27 Citations (Scopus)
2000

Applications of superconducting permanent magnets driven by static and pulsed fields

Mizutani, U., Ikuta, H., Hosokawa, T., Ishihara, H., Tazoe, K., Oka, T., Itoh, Y., Yanagi, Y. & Yoshikawa, M., 2000 Jun 1, In : Superconductor Science and Technology. 13, 6, p. 836-840 5 p.

Research output: Contribution to journalConference article

28 Citations (Scopus)

Construction of a 2-5 T class superconducting magnetic field generator with use of an Sm123 bulk superconductor and its application to high-magnetic field demanding devices

Oka, T., Itoh, Y., Yanagi, Y., Yoshikawa, M., Ikuta, H. & Mizutani, U., 2000 Jun, In : Physica C: Superconductivity and its applications. 335, 1, p. 101-106 6 p.

Research output: Contribution to journalConference article

58 Citations (Scopus)

Pulse field magnetization of melt-processed Sm-Ba-Cu-O

Ikuta, H., Ishihara, H., Hosokawa, T., Yanagi, Y., Itoh, Y., Yoshikawa, M., Oka, T. & Mizutani, U., 2000 Jun 1, In : Superconductor Science and Technology. 13, 6, p. 846-849 4 p.

Research output: Contribution to journalConference article

28 Citations (Scopus)

Synthesis of c-axis-oriented Sm123 superconductors and their performance as superconducting permanent magnets

Mizutani, U., Mase, A., Tazoe, K., Ikuta, H., Oka, T., Itoh, Y., Yanagi, Y. & Yoshikawa, M., 2000 Jun, In : Physica C: Superconductivity and its applications. 335, 1, p. 92-96 5 p.

Research output: Contribution to journalConference article

18 Citations (Scopus)