Tetsuo Oka

  • 1918 Citations
  • 22 h-Index
1990 …2020

Research output per year

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Improvement of the microstructure of melt-processed Sm-based superconductors

Tazoe, K., Ikuta, H., Yoshikawa, M., Yanagi, Y., Itoh, Y., Oka, T. & Mizutani, U., 2001 Jan 1, In : Physica C: Superconductivity and its applications. 357-360, p. 807-810 4 p.

Research output: Contribution to journalArticle

13 Citations (Scopus)

Improvement of the trapped field performance of a holed superconducting bulk magnet

Yokoyama, K., Igarashi, R., Togasaki, R. & Oka, T., 2015 Jun 1, In : IEEE Transactions on Applied Superconductivity. 25, 3, 7006763.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Influence of AC transport current balance on AC loss in a two layered polygonal YBCO assembled conductor

Ogawa, J., Fukui, S., Oka, T., Sato, T., Tamura, A., Kasuga, E. & Ryu, K. W., 2012 Jun 25, In : IEEE Transactions on Applied Superconductivity. 22, 3, 4704804.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Influence of DC offset transport current on AC loss characteristics in HTS tapes

Ogawa, J., Fukui, S., Oka, T., Sato, T., Kojima, H., Shibayama, M. & Egawa, M., 2011 Jun 1, In : IEEE Transactions on Applied Superconductivity. 21, 3 PART 3, p. 3325-3328 4 p., 5621862.

Research output: Contribution to journalArticle

6 Citations (Scopus)

Influence of high frequency AC magnetic field on trapped magnetic field

Ogawa, J., Fukui, S., Oka, T., Yamaguchi, M., Sato, T., Takada, M., Sato, R. & Tomita, M., 2007 Jun 1, In : IEEE Transactions on Applied Superconductivity. 17, 2, p. 3024-3027 4 p.

Research output: Contribution to journalArticle

6 Citations (Scopus)

Influence of the arrangement of HTS tapes inserted in an iron core on AC loss characteristics

Ogawa, J., Fukui, S., Oka, T., Sato, T., Fushimi, A. & Shoda, T., 2014 Jan 1, In : IEEE Transactions on Applied Superconductivity. 24, 3, 6595123.

Research output: Contribution to journalArticle

4 Citations (Scopus)

Influence of the Position of a Small Hole on the Trapped Field Performance in a Holed Superconducting Bulk Magnet

Yokoyama, K., Kulawansha, M. P. E. S., Yuanding, Z. & Oka, T., 2016 Apr 1, In : IEEE Transactions on Applied Superconductivity. 26, 3, 7416160.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Influence of the Shape of Soft-Iron Yoke on Trapped Field Performance of HTS Bulk

Yokoyama, K. & Oka, T., 2020 Jun, In : IEEE Transactions on Applied Superconductivity. 30, 4, 9007667.

Research output: Contribution to journalArticle

Influence of transport current distribution on AC transport current loss measurement in an assembled conductor

Ogawa, J., Fukui, S., Oka, T., Sato, T., Shinkai, K., Koyama, T. & Ito, T., 2010 Jun 1, In : IEEE Transactions on Applied Superconductivity. 20, 3, p. 1300-1303 4 p., 5433294.

Research output: Contribution to journalArticle

15 Citations (Scopus)

Learn-by-doing engineering education programs driven by the engineers of private companies and societies

Oka, T., Harada, S., Tanabe, Y., Narumi, T., Kaneko, F., Sugawara, A., Ishii, N., Nishimura, S., Maruyama, T., Sengoku, M., Ohkawa, H. & Tsubokawa, N., 2013 May 10, In : IEEJ Transactions on Fundamentals and Materials. 133, 4, p. 180-185+6

Research output: Contribution to journalArticle

Magnetic and thermal properties of HTS bulk magnet in the pulsed-field magnetizing process

Oka, T., Ishiduka, D., Ogawa, J., Fukui, S., Sato, T., Yokoyama, K. & Murakami, A., 2013 Apr 1, In : Journal of Superconductivity and Novel Magnetism. 26, 4, p. 1301-1306 6 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Magnetic Field Direction Dependence of AC Losses in Bi2223/Ag Tape

Ogawa, J., Fukui, S., Oka, T., Shidara, N., Iwashita, R. & Ohya, M., 2016 Jun 1, In : IEEE Transactions on Applied Superconductivity. 26, 4, 7377072.

Research output: Contribution to journalArticle

Magnetic field distribution of permanent magnet magnetized by static magnetic field generated by HTS bulk magnet

Oka, T., Kawasaki, N., Fukui, S., Ogawa, J., Sato, T., Terasawa, T., Itoh, Y. & Yabuno, R., 2012 Jun 25, In : IEEE Transactions on Applied Superconductivity. 22, 3, 6101562.

Research output: Contribution to journalArticle

6 Citations (Scopus)

Magnetic Flux Invasion and Field-Capturing in Pulsed-Field Magnetization for Layered MgB<formula><tex>$_2$</tex></formula> Bulk Magnets

Oka, T., Takeda, A., Sasaki, S., Ogawa, J., Fukui, S., Sato, T., Haessler, W. & Yokoyama, K., 2018 Jan 11, (Accepted/In press) In : IEEE Transactions on Applied Superconductivity.

Research output: Contribution to journalArticle

Magnetic Flux Invasion and Field-Capturing in Pulsed-Field Magnetization for Layered MgB2 Bulk Magnets

Oka, T., Takeda, A., Sasaki, S., Ogawa, J., Fukui, S., Sato, T., Scheiter, J., Häßler, W., Katsuki, J., Miura, A. & Yokoyama, K., 2018 Jun, In : IEEE Transactions on Applied Superconductivity. 28, 4, 8255574.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Magnetic precipitate separation for Ni plating waste liquid using HTS bulk magnets

Oka, T., Kimura, T., Mimura, D., Fukazawa, H., Fukui, S., Ogawa, J., Sato, T., Ooizumi, M., Yokoyama, K., Tsujimura, M. & Terasawa, T., 2013 Jan 15, In : Physica C: Superconductivity and its applications. 484, p. 325-328 4 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Magnetic Separation for Recovering Ni Compounds from Plating Waste with Use of HTS Bulk Magnets

Oka, T., Takayanagi, Y., Machida, S., Ichiju, K., Fukui, S., Ogawa, J., Sato, T., Ooizumi, M., Tsujimura, M. & Yokoyama, K., 2016 Jun 1, In : IEEE Transactions on Applied Superconductivity. 26, 4, 7383257.

Research output: Contribution to journalArticle

8 Citations (Scopus)

Magnetic separation technique for environmental water purification by strong magnetic field generator loading HTS bulk magnets

Oka, T., Tanaka, K., Kimura, T., Mimura, D., Fukui, S., Ogawa, J., Sato, T., Ooizumi, M., Yokoyama, K. & Yamaguchi, M., 2010 Nov 1, In : Physica C: Superconductivity and its applications. 470, 20, p. 1799-1803 5 p.

Research output: Contribution to journalArticle

10 Citations (Scopus)

Magnetic separation technique for groundwater by five HTS melt-processed bulk magnets arranged in a line

Oka, T., Seki, H., Kimura, T., Mimura, D., Fukui, S., Ogawa, J., Sato, T., Ooizumi, M., Fujishiro, H., Hayashi, H., Yokoyama, K. & Stiehler, C., 2011 Nov 1, In : Physica C: Superconductivity and its applications. 471, 21-22, p. 1506-1510 5 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Magnetic separation technique using high temperature superconducting bulk magnets and application to plating liquid waste treatment

Oka, T., Fukazawa, H., Yoshizawa, N., Takayanagi, Y., Ogawa, J., Fukui, S., Sato, T., Ooizumi, M., Tsujimura, M. & Yokoyama, K., 2014 Jan 1, In : Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy. 61, SUPLL.1, p. S164-S166

Research output: Contribution to journalArticle

Magnetization behavior of RE123 bulk magnets bearing twin seed-crystals in pulsed field magnetization processes

Oka, T., Miyazaki, T., Ogawa, J., Fukui, S., Sato, T., Yokoyama, K. & Langer, M., 2015 Dec 17, In : Superconductor Science and Technology. 29, 2, 024003.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Magnetizing of permanent magnets using HTS bulk magnets

Oka, T., Muraya, T., Kawasaki, N., Fukui, S., Ogawa, J., Sato, T. & Terasawa, T., 2012 Jan 1, In : Cryogenics. 52, 1, p. 27-31 5 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Magnetizing performance evaluation of HTS bulk magnet using a 12 K refrigerator with high cooling capacity

Yokoyama, K., Katsuki, A., Miura, A. & Oka, T., 2018 Aug 13, (Accepted/In press) In : IEEE Transactions on Applied Superconductivity.

Research output: Contribution to journalArticle

Measurement and numerical analysis of AC loss in high temperature superconducting coil

Fukui, S., Shibayama, M., Ogawa, J., Oka, T., Sato, T., Takao, T. & Tsukamoto, O., 2012 Jun 25, In : IEEE Transactions on Applied Superconductivity. 22, 3, 4704904.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Measurement and numerical analysis of dependence of ac loss in polygonal conductor assembled by YBCO tapes on gap length between neighboring tapes

Fukui, S., Hatakeyama, S., Nanayama, J., Maruko, A., Ogawa, J., Sato, T., Oka, T. & Tsukamoto, O., 2013 Feb 12, In : IEEE Transactions on Applied Superconductivity. 23, 3, 6407801.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Mechanical and superconducting properties of Ag/YBCO composite superconductors reinforced by the addition of Zr

Oka, T., Ogasawara, F., Itoh, Y., Suganuma, M. & Mizutani, U., 1990 Oct, In : Japanese Journal of Applied Physics. 29, 10, p. 1924-1931 8 p.

Research output: Contribution to journalArticle

21 Citations (Scopus)

Mechanical properties of Zr-YBCO/Ag sintered superconducting composites

Oka, T., Itoh, Y., Yanagi, Y., Tanaka, H. & Mizutani, U., 1991 Dec 1, In : Physica C: Superconductivity and its applications. 185-189, PART 1, p. 507-508 2 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Melt-processed Sm-Ba-Cu-O superconductors trapping strong magnetic field

Ikuta, H., Mase, A., Yanagi, Y., Yoshikawa, M., Itoh, Y., Oka, T. & Mizutani, U., 1998 Nov 1, In : Superconductor Science and Technology. 11, 11, p. 1345-1347 3 p.

Research output: Contribution to journalArticle

143 Citations (Scopus)

Melt processing and the performance as a superconducting permanent magnet of RE-Ba-Cu-O/Ag (RE = Sm, Nd)

Ikuta, H., Yanagi, Y., Yoshikawa, M., Itoh, Y., Oka, T. & Mizutani, U., 2001 Sep, In : Physica C: Superconductivity and its applications. 357-360, p. 837-842 6 p.

Research output: Contribution to journalArticle

15 Citations (Scopus)

Melt-processing of Ag-added LRE-Ba-Cu-O (LRE = Nd, Sm)

Ikuta, H., Ikeda, S., Mase, A., Yoshikawa, M., Yanagi, Y., Itoh, Y., Oka, T. & Mizutani, U., 1998 Jan 1, In : Applied Superconductivity. 6, 2-5, p. 109-117 9 p.

Research output: Contribution to journalArticle

34 Citations (Scopus)

Metallurgical Reactions and Their Relationships to Enhanced Mechanical Strength in Zr-Bearing YBCO Composite Superconductors

Oka, T., Itoh, Y., Yanagi, Y., Tanaka, H., Takashima, S. I. & Mizutani, U., 1992 Jun, In : Japanese Journal of Applied Physics. 31, 6 R, p. 1760-1764 5 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Modeling of Magnetization Loss in HTS Tape Exposed to All Magnetic Field Directions

Ogawa, J., Fukui, S., Oka, T., Panpan, Y. & Kanamori, K., 2018 Apr 1, In : IEEE Transactions on Applied Superconductivity. 28, 3, 8239653.

Research output: Contribution to journalArticle

1 Citation (Scopus)

New type superconducting bulk magnet by pulse field magnetizing with usable surface on both sides in open space

Fujishiro, H., Fujiwara, A., Tateiwa, T., Oka, T. & Hayashi, H., 2006 Jun 1, In : IEEE Transactions on Applied Superconductivity. 16, 2, p. 1080-1083 4 p., 1643036.

Research output: Contribution to journalArticle

8 Citations (Scopus)
Open Access
4 Citations (Scopus)

Numerical analysis of AC loss characteristics of multi-layer HTS cable assembled by coated conductors

Fukui, S., Ogawa, J., Suzuki, N., Oka, T., Sato, T., Tsukamoto, O. & Takao, T., 2009 Jun 1, In : IEEE Transactions on Applied Superconductivity. 19, 3, p. 1714-1717 4 p., 4982598.

Research output: Contribution to journalArticle

20 Citations (Scopus)

Numerical analysis of AC transport current loss measurements using a pick-up loop

Ogawa, J., Fukui, S., Oka, T., Yamaguchi, M., Sato, T., Hamada, T. & Tanaka, H., 2008 Jun 1, In : IEEE Transactions on Applied Superconductivity. 18, 2, p. 1358-1361 4 p., 4515900.

Research output: Contribution to journalArticle

Numerical analysis of bulk superconducting magnet magnetized by pulsed-field considering a partial difference of superconducting characteristics

Yokoyama, K., Oka, T., Fujishiro, H. & Noto, K., 2008 Jun 1, In : IEEE Transactions on Applied Superconductivity. 18, 2, p. 1545-1548 4 p., 4512029.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Numerical analysis of relation between AC loss characteristics and geometrical parameters of multi-layer polygonal conductor assembled by HTS coated conductor

Fukui, S., Suzuki, N., Ogawa, J., Oka, T., Sato, T. & Tsukamoto, O., 2010 Jun 1, In : IEEE Transactions on Applied Superconductivity. 20, 3, p. 2138-2141 4 p., 5443668.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Numerical evaluation of pulsed field magnetization of a bulk high Tc superconductor

Tsuchimoto, M., Waki, H., Itoh, Y., Yanagi, Y., Yoshikawa, M., Oka, T., Yamada, Y. & Mizutani, U., 1997 Jan, In : Cryogenics. 37, 1, p. 43-47 5 p.

Research output: Contribution to journalArticle

15 Citations (Scopus)

Numerical study of optimization design of high temperature superconducting field winding in 20 MW synchronous motor for ship propulsion

Fukui, S., Kawai, T., Takahashi, M., Ogawa, J., Oka, T., Sato, T. & Tsukamoto, O., 2012 Jun 25, In : IEEE Transactions on Applied Superconductivity. 22, 3, 5200504.

Research output: Contribution to journalArticle

12 Citations (Scopus)

Numerical study of the influence of material properties on pulsed-field magnetization for hts bulk magnets

Ogawa, J., Oka, T., Fukui, S., Sato, T., Watanabe, N. & Basir, Z. M., 2014 Jan 1, In : IEEE Transactions on Applied Superconductivity. 24, 3, 6600815.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Numerical study on AC loss reduction of multi-pole HTS coil by optimal design of winding cross section of element coil

Fukui, S., Takahashi, M., Ogawa, J., Oka, T., Sato, T., Yamaguchi, M. & Takao, T., 2010 Jun 1, In : IEEE Transactions on Applied Superconductivity. 20, 3, p. 2150-2154 5 p., 5451072.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Oxygen diffusivity in melt-processed SmBCO and YBCO bulk-superconductors

Yamada, T., Ikuta, H., Yoshikawa, M., Yanagi, Y., Itoh, Y., Oka, T. & Mizutani, U., 2002 Oct 1, In : Physica C: Superconductivity and its applications. 378-381, PART 1, p. 713-717 5 p.

Research output: Contribution to journalArticle

4 Citations (Scopus)

Performance of trapped magnetic field in superconducting bulk magnets activated by pulsed field magnetization

Oka, T., Seki, H., Ogawa, J., Fukui, S., Sato, T. & Yokoyama, K., 2011 Jun 1, In : IEEE Transactions on Applied Superconductivity. 21, 3 PART 3, p. 3356-3359 4 p., 5658131.

Research output: Contribution to journalArticle

13 Citations (Scopus)

Performances of compact magnetic field generators using cryo-cooled high temperature bulk superconductors as quasi-permanent magnets

Oka, T., Hirose, Y., Kanayama, H., Kikuchi, H., Fukui, S., Ogawa, J., Sato, T. & Yamaguchi, M., 2007 Dec 1, In : Superconductor Science and Technology. 20, 12, p. 1233-1238 6 p.

Research output: Contribution to journalArticle

11 Citations (Scopus)

Preferential magnetic flux invasion and heat generation owing to macrostructure in HTS bulk magnets in pulse field magnetization processes

Oka, T., Ota, H., Shimoda, T., Ogawa, J., Fukui, S., Sato, T., Yokoyama, K., Murakami, A. & Langer, M., 2015 Jun 1, In : IEEE Transactions on Applied Superconductivity. 25, 3, 6980106.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Preparation of melt-textured NdBa2Cu3Oy bulk with Nd4Ba2Cu2O10 addition

Takagi, A., Yamazaki, T., Oka, T., Yanagi, Y., Itoh, Y., Yoshikawa, M., Yamada, Y. & Mizutani, U., 1995 Aug 15, In : Physica C: Superconductivity and its applications. 250, 3-4, p. 222-226 5 p.

Research output: Contribution to journalArticle

30 Citations (Scopus)

Present status of R & D on superconducting magnetic bearing technologies for flywheel energy storage system

Koshizuka, N., Ishikawa, F., Nasu, H., Murakami, M., Matsunaga, K., Saito, S., Saito, O., Nakamura, Y., Yamamoto, H., Takahata, R., Oka, T., Ikezawa, H. & Tomita, M., 2002 Oct 1, In : Physica C: Superconductivity and its applications. 378-381, PART 1, p. 11-17 7 p.

Research output: Contribution to journalArticle

33 Citations (Scopus)

Processing and applications of bulk HTSC

Oka, T., 2007 Oct 1, In : Physica C: Superconductivity and its applications. 463-465, SUPPL., p. 7-13 7 p.

Research output: Contribution to journalArticle

34 Citations (Scopus)