Tetsuo Oka

  • 1899 Citations
  • 22 h-Index
1990 …2019

Research output per year

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Accuracy of AC transport current loss in HTS tape measurements using a pick-up loop

Ogawa, J., Fukui, S., Oka, T., Sato, T., Maruko, A. & Tanaka, H., 2009 Jun 1, In : IEEE Transactions on Applied Superconductivity. 19, 3, p. 2391-2394 4 p., 5109567.

Research output: Contribution to journalArticle

AC loss distribution in two-layer HTS cable

Ogawa, J., Fukui, S., Oka, T., Ogawa, T. & Sugai, M., 2018 Apr 1, In : IEEE Transactions on Applied Superconductivity. 28, 3, 5900104.

Research output: Contribution to journalArticle

2 Citations (Scopus)

A construction of high temperature superconducting motor using YBCO bulk magnets

Itoh, Y., Yanagi, Y., Yoshikawa, M., Oka, T., Harada, S., Sakakibara, T., Yamada, Y. & Mizutani, U., 1994 Jan 1, In : Physica C: Superconductivity and its applications. 235-240, PART 5, p. 3445-3446 2 p.

Research output: Contribution to journalArticle

10 Citations (Scopus)

AC transport current loss characteristics of HTS assembled conductors arranged edge-to-edge or face-to-face

Ogawa, J., Fukui, S., Oka, T., Yamaguchi, M., Sato, T., Kume, S., Shinkai, K. & Sato, S., 2008 Jun 1, In : IEEE Transactions on Applied Superconductivity. 18, 2, p. 1353-1357 5 p., 4515899.

Research output: Contribution to journalArticle

5 Citations (Scopus)

A Numerical Proposal of an After Heating Method for Pulse Field Magnetization for HTS Bulk Magnets

Ogawa, J., Oka, T., Fukui, S., Sato, T. & Watanabe, N., 2015 Jun 1, In : IEEE Transactions on Applied Superconductivity. 25, 3, 6945334.

Research output: Contribution to journalArticle

Application of HTS bulk magnet system to the magnetic separation techniques for water purification

Oka, T., Kanayama, H., Fukui, S., Ogawa, J., Sato, T., Ooizumi, M., Terasawa, T., Itoh, Y. & Yabuno, R., 2008 Sep 15, In : Physica C: Superconductivity and its Applications. 468, 15-20, p. 2128-2132 5 p.

Research output: Contribution to journalArticle

26 Citations (Scopus)

A strong magnetic field generation by superconducting bulk magnets with the same pole arrangement

Yokoyama, K., Oka, T. & Noto, K., 2009 Jun 1, In : IEEE Transactions on Applied Superconductivity. 19, 3, p. 2178-2181 4 p., 5067189.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Collection of Ni-bearing material from electroless plating waste by magnetic separation with HTS bulk magnet

Oka, T., Fukazawa, H., Fukui, S., Ogawa, J., Sato, T., Ooizumi, M., Tsujimura, M. & Yokoyama, K., 2014 Jan 15, In : Physica C: Superconductivity and its Applications. 496, C, p. 58-62 5 p.

Research output: Contribution to journalArticle

11 Citations (Scopus)

Compactly composed strong magnetic field generators with cryo-cooled high temperature bulk superconductors as quasi-permanent magnets

Oka, T., Hirose, Y., Kanayama, H., Kikuchi, H., Ogawa, J., Fukui, S., Sato, T. & Yamaguchi, M., 2008 Feb 1, In : Journal of Physics: Conference Series. 97, 1, 012102.

Research output: Contribution to journalArticle

3 Citations (Scopus)
1 Citation (Scopus)

Construction of a strong magnetic field generator with wide magnetic poles by bulk superconductors

Oka, T., Yokoyama, K. & Noto, K., 2004 Oct 1, In : Physica C: Superconductivity and its Applications. 412-414, SPEC. ISS., p. 761-765 5 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Construction of strong magnetic field generators by high Tc bulk superconductors and its applications

Oka, T., Yokoyama, K. & Noto, K., 2004 Jun 1, In : IEEE Transactions on Applied Superconductivity. 14, 2, p. 1058-1061 4 p.

Research output: Contribution to journalArticle

12 Citations (Scopus)

Construction of superconducting bulk magnet magnetron sputtering apparatus for fabrication of highly reflective optical mirrors

Mizutani, U., Yamaguchi, T., Ikuta, H., Tomofuji, T., Yanagi, Y., Itoh, Y. & Oka, T., 2008 Jun 15, In : Materials Science and Engineering B: Solid-State Materials for Advanced Technology. 151, 1, p. 84-89 6 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Construction of various types of strong magnetic field generators using superconducting bulk magnets

Oka, T., Yokoyama, K. & Noto, K., 2005 Feb 1, In : Superconductor Science and Technology. 18, 2

Research output: Contribution to journalArticle

8 Citations (Scopus)

Critical current density and mechanical strength of YBa2Cu3O7-δ superconducting composites containing Zr, Ag and Y2BaCuO5 dispersions by melt-processing

Oka, T., Itoh, Y., Yanagi, Y., Tanaka, H., Takashima, S., Yamada, Y. & Mizutani, U., 1992 Sep 15, In : Physica C: Superconductivity and its Applications. 200, 1-2, p. 55-64 10 p.

Research output: Contribution to journalArticle

67 Citations (Scopus)

Development and test of model apparatus of non-contact spin processor for photo mask production applying radial-type superconducting magnetic bearing

Saito, K., Fukui, S., Maezawa, M., Ogawa, J., Oka, T. & Sato, T., 2013 Jan 15, In : Physica C: Superconductivity and its Applications. 484, p. 321-324 4 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Development and test of model apparatus utilizing HTS magnetic levitation for non-contact spinning clean-up processors of photo mask production

Saito, K., Fukui, S., Ogawa, J., Oka, T., Sato, T., Sorimachi, S. & Miyazaki, S., 2011 Jun 1, In : IEEE Transactions on Applied Superconductivity. 21, 3 PART 2, p. 2241-2244 4 p., 5617305.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Development of a Desktop-Type Superconducting Bulk Magnet

Yokoyama, K., Kulawansha, E., Yuanding, Z. & Oka, T., 2016 Jun 1, In : IEEE Transactions on Applied Superconductivity. 26, 4, 7386635.

Research output: Contribution to journalArticle

7 Citations (Scopus)

Development of a magnetron sputtering apparatus equipped with superconducting bulk magnets for the preparation of optical multilayer films

Yamaguchi, T., Ikuta, H., Yanagi, Y., Itoh, Y., Oka, T. & Mizutani, U., 2007 Oct 1, In : Physica C: Superconductivity and its Applications. 463-465, SUPPL., p. 1342-1345 4 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Development of a small-size superconducting bulk magnet system especially designed for a pulsed-field magnetization

Yokoyama, K., Oka, T. & Noto, K., 2009 Oct 15, In : Physica C: Superconductivity and its Applications. 469, 15-20, p. 1282-1285 4 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Development of a small-size superconducting bulk magnet system using a 13 K refrigerator

Yokoyama, K., Oka, T. & Noto, K., 2010 Jun 1, In : IEEE Transactions on Applied Superconductivity. 20, 3, p. 973-976 4 p., 5433295.

Research output: Contribution to journalArticle

8 Citations (Scopus)

Development of a superconducting magnet for nuclear magnetic resonance using bulk high-temperature superconducting materials

Nakamura, T., Itoh, Y., Yoshikawa, M., Oka, T. & Uzawa, J., 2007 Apr 1, In : Concepts in Magnetic Resonance Part B: Magnetic Resonance Engineering. 31, 2, p. 65-70 6 p.

Research output: Contribution to journalArticle

63 Citations (Scopus)

Development of five aligned superconducting bulk magnets by pulse field magnetizing

Fujiwara, A., Tateiwa, T., Fujishiro, H., Hayashi, H., Nagafuchi, T. & Oka, T., 2006 Oct 1, In : Physica C: Superconductivity and its Applications. 445-448, 1-2, p. 399-402 4 p.

Research output: Contribution to journalArticle

6 Citations (Scopus)

Effect of metal ring setting outside HTSC bulk disk on trapped field and temperature rise in pulse field magnetizing

Fujishiro, H., Yokoyama, K., Kaneyama, M., Oka, T. & Noto, K., 2005 Jun 1, In : IEEE Transactions on Applied Superconductivity. 15, 2 PART III, p. 3762-3765 4 p.

Research output: Contribution to journalArticle

13 Citations (Scopus)

Effect of Nd422 addition on Jc in Nd123 melt-textured bulk superconductor

Ikeda, S., Oka, T., Yamada, Y., Yoshikawa, M., Yanagi, Y., Itoh, Y. & Mizutani, U., 1997 Jan 1, In : Japanese Journal of Applied Physics, Part 2: Letters. 36, 3 B

Research output: Contribution to journalArticle

15 Citations (Scopus)

Enhancement of Trapped Magnetic Field Using a Large-Size REBCO Bulk in a Desktop Type Superconducting Bulk Magnet

Yokoyama, K., Katsuki, A., Miura, A. & Oka, T., 2018 Apr 1, In : IEEE Transactions on Applied Superconductivity. 28, 3, 8187669.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Estimation of generated heat in pulse field magnetizing for SmBaCuO bulk superconductor

Fujishiro, H., Yokoyama, K., Kaneyama, M., Oka, T. & Noto, K., 2004 Oct 1, In : Physica C: Superconductivity and its Applications. 412-414, SPEC. ISS., p. 646-650 5 p.

Research output: Contribution to journalArticle

20 Citations (Scopus)

Evaluation of current distribution in bulk superconductors magnetized by pulsed-fields

Yokoyama, K., Oka, T., Fujishiro, H. & Noto, K., 2007 Oct 1, In : Physica C: Superconductivity and its Applications. 463-465, SUPPL., p. 410-414 5 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Evaluation of magnetic field distribution of superconducting bulk magnets with the same pole arrangement

Yokoyama, K., Oka, T. & Noto, K., 2008 Sep 15, In : Physica C: Superconductivity and its Applications. 468, 15-20, p. 2165-2169 5 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Evaluation of magnetic force distribution on a pair of superconducting bulk magnets

Yokoyama, K., Oka, T. & Noto, K., 2010 Nov 1, In : Physica C: Superconductivity and its Applications. 470, 20, p. 1201-1206 6 p.

Research output: Contribution to journalArticle

Evaluation of pulsed-field magnetization of a bulk superconductor with small holes

Yokoyama, K., Oka, T., Kondo, N. & Hosaka, S., 2013 Feb 11, In : IEEE Transactions on Applied Superconductivity. 23, 3, 6403884.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Evaluation of pulsed-field magnetization on a superconducting bulk magnet system using a 13 K refrigerator

Yokoyama, K., Oka, T. & Noto, K., 2011 Jun 1, In : IEEE Transactions on Applied Superconductivity. 21, 3 PART 2, p. 1657-1660 4 p., 5624613.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Evaluation of the measurement of AC transport current loss in assembled HTS tapes using a pick-up loop

Ogawa, J., Fukui, S., Oka, T., Yamaguchi, M., Sato, T., Yamaya, K., Hamada, T. & Tanaka, H., 2007 Oct 1, In : Physica C: Superconductivity and its Applications. 463-465, SUPPL., p. 1159-1162 4 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Experimental and theoretical study of AC losses in variable asymmetrical magnetic environments

Ranecky, S. T., Watanabe, H., Ogawa, J., Oka, T., Gölden, D., Alff, L. & Genenko, Y. A., 2017 Jul 6, In : Superconductor Science and Technology. 30, 8, 085005.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Experimental evaluation of the effect on AC loss of a polygonal arrangement in YBCO assembled conductors

Ogawa, J., Fukui, S., Oka, T., Sato, T., Ito, T., Sugisawa, J. & Tamura, A., 2011 Jun 1, In : IEEE Transactions on Applied Superconductivity. 21, 3 PART 3, p. 3285-3288 4 p., 5613958.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Experimental investigation of AC loss characteristics in HTS tape with rotating magnetic field

Ogawa, J., Fukui, S., Oka, T., Sano, Y., Ogawa, M. & Ranecky, S. T., 2017 Jun 1, In : IEEE Transactions on Applied Superconductivity. 27, 4, 7812682.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Experimental Investigation of AC Loss Characteristics of Stacked HTS Tapes in an Iron Core

Ogawa, J., Fukui, S., Oka, T., Sakurai, T., Sano, Y., Tada, H. & Yoshii, Y., 2016 Jun 1, In : IEEE Transactions on Applied Superconductivity. 26, 4, 7435291.

Research output: Contribution to journalArticle

7 Citations (Scopus)

Experimental investigation of loss characteristics with AC and DC offset transport current in HTS double pancake coil

Ogawa, J., Fukui, S., Oka, T., Sato, T., Shibayama, M., Egawa, M. & Sato, A., 2012 Jun 25, In : IEEE Transactions on Applied Superconductivity. 22, 3, 4705004.

Research output: Contribution to journalArticle

7 Citations (Scopus)

Fabrication of Mo/Si multilayer mirrors for extreme ultraviolet lithography by means of superconducting bulk magnet magnetron sputtering

Mizutani, U., Yamaguchi, T., Ikuta, H., Tomofuji, T., Yanagi, Y., Itoh, Y. & Oka, T., 2008 Sep 15, In : Physica C: Superconductivity and its Applications. 468, 15-20, p. 1456-1460 5 p.

Research output: Contribution to journalArticle

6 Citations (Scopus)

Feasible Applications of Bulk HTS Magnets and Magnetic Field-Capturing Characteristics in Their Activation Processes

Oka, T., Takeda, A., Shimizu, K., Higa, K., Tsunoda, S., Ogawa, J., Fukui, S., Sato, T., Yokoyama, K. & Nakamura, T., 2018 Aug 28, (Accepted/In press) In : IEEE Transactions on Applied Superconductivity.

Research output: Contribution to journalArticle

Flux-invading behaviors and temperature changes in Dy123 bulk magnet in iterative pulse field magnetization process

Oka, T., Ishiduka, D., Ogawa, J., Fukui, S., Sato, T., Yokoyama, K., Murakami, A. & Stopfel, H., 2013 May 6, In : Physica C: Superconductivity and its Applications. 494, p. 46-49 4 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Flux motion studies by means of temperature measurement in magnetizing processes for HTSC bulks

Fujishiro, H., Oka, T., Yokoyama, K., Kaneyama, M. & Noto, K., 2004 Jun 1, In : IEEE Transactions on Applied Superconductivity. 14, 2, p. 1054-1057 4 p.

Research output: Contribution to journalArticle

13 Citations (Scopus)

Generated heat during pulse field magnetizing for REBaCuO (RE = Gd, Sm, Y) bulk superconductors with different pinning abilities

Fujishiro, H., Kaneyama, M., Yokoyama, K., Oka, T. & Noto, K., 2005 Jan 1, In : Superconductor Science and Technology. 18, 1, p. 158-165 8 p.

Research output: Contribution to journalArticle

19 Citations (Scopus)

Generation of extremely strong magnetic fields in open space by using metal-ring-reinforced 60 mm ∅ Sm-Ba-Cu-O superconducting bulk

Yanagi, Y., Yoshikawa, M., Itoh, Y., Oka, T., Ikuta, H. & Mizutani, U., 2004 Oct 1, In : Physica C: Superconductivity and its Applications. 412-414, SPEC. ISS., p. 744-749 6 p.

Research output: Contribution to journalArticle

15 Citations (Scopus)

Heat propagation analysis in HTSC bulks during pulse field magnetization

Fujishiro, H., Kawaguchi, S., Kaneyama, M., Fujiwara, A., Tateiwa, T. & Oka, T., 2006 Jul 1, In : Superconductor Science and Technology. 19, 7

Research output: Contribution to journalArticle

8 Citations (Scopus)

Higher trapped field over 5 T on HTSC bulk by modified pulse field magnetizing

Fujishiro, H., Tateiwa, T., Fujiwara, A., Oka, T. & Hayashi, H., 2006 Oct 1, In : Physica C: Superconductivity and its Applications. 445-448, 1-2, p. 334-338 5 p.

Research output: Contribution to journalArticle

130 Citations (Scopus)

High-temperature superconducting motor using y-ba-cu-0 bulk magnets

Itoh, Y., Yanagi, Y., Yoshikawa, M., Oka, T., Harada, S., Sakakibara, T., Yamada, Y. & Mizutani, U., 1995 Jan 1, In : Japanese Journal of Applied Physics. 34, 10, p. 5574-5578 5 p.

Research output: Contribution to journalArticle

65 Citations (Scopus)

High temperature superconducting quasi-permanent magnets and their application to superconducting motor

Oka, T., Itoh, Y., Yanagi, Y., Yoshikawa, M., Sakakibara, T., Harada, S., Yamada, Y. & Mizutani, U., 1997 Jan 1, In : Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals. 61, 9, p. 931-936 6 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Importance of initial "M-shaped" trapped field profile in a two-stage pulse field magnetization (MMPSC) method

Fujishiro, H., Hiyama, T., Tateiwa, T., Yanagi, Y. & Oka, T., 2007 Oct 1, In : Physica C: Superconductivity and its Applications. 463-465, SUPPL., p. 394-397 4 p.

Research output: Contribution to journalArticle

20 Citations (Scopus)

Improvement of a magnetization method on a small-size superconducting bulk magnet system

Yokoyama, K., Oka, T. & Noto, K., 2011 Nov 1, In : Physica C: Superconductivity and its Applications. 471, 21-22, p. 901-904 4 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)