Tetsuo Oka

  • 1918 Citations
  • 22 h-Index
1990 …2020

Research output per year

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Research Output

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Article
2011

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)

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)

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)

Prototype of SC inverter

Osamura, K., Sakai, A., Nakamura, T., Oka, T., Fukuda, S. & Yamaguchi, S., 2011 Jun 1, In : IEEE Transactions on Applied Superconductivity. 21, 3 PART 2, p. 1445-1448 4 p., 5675739.

Research output: Contribution to journalArticle

1 Citation (Scopus)
2010

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)

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

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)

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)

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 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)

Research and development of non-contact spin processor for clean process in semiconductor-related-production system by applying HTS magnetic levitation

Fukui, S., Kazama, K., Sekiya, S., Ogawa, J., Oka, T., Sato, T., Sorimachi, S., Saito, K. & Miyazaki, S., 2010 Jun 1, In : IEEE Transactions on Applied Superconductivity. 20, 3, p. 977-980 4 p., 5433322.

Research output: Contribution to journalArticle

3 Citations (Scopus)
2009

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

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)

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)

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)

Study of flow fractionation characteristics of magnetic chromatography utilizing high-temperature superconducting bulk magnet

Fukui, S., Shoji, Y., Ogawa, J., Oka, T., Yamaguchi, M., Sato, T., Ooizumi, M., Imaizumi, H. & Ohara, T., 2009 Mar 1, In : Science and Technology of Advanced Materials. 10, 1, 014610.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Study on magnetic separation system using high Tc superconducting bulk magnets for water purification technique

Oka, T., Kanayama, H., Tanaka, K., Fukui, S., Ogawa, J., Sato, T., Yamaguchi, M., Ooizumi, M., Yokoyama, K. & Noto, K., 2009 Jan 1, In : Journal of Physics: Conference Series. 156, 012031.

Research output: Contribution to journalArticle

6 Citations (Scopus)

Thermal and magnetic behaviors of a melt-textured superconducting bulk magnet in the zero-field-cooling magnetizing process

Oka, T., Yokoyama, K., Fujishiro, H. & Noto, K., 2009 Aug 11, In : Superconductor Science and Technology. 22, 6, 065014.

Research output: Contribution to journalArticle

10 Citations (Scopus)

Thermal behavior and field-trapping property of melt-textured superconducting bulk magnets activated by quasi-static magnetic fields

Oka, T., Yokoyama, K., Fujishiro, H. & Noto, K., 2009 Jan 1, In : Journal of Physics: Conference Series. 150, 5, 052195.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Waste water purification by magnetic separation technique using HTS bulk magnet system

Oka, T., Kanayama, H., Tanaka, K., Fukui, S., Ogawa, J., Sato, T., Ooizumi, M., Terasawa, T., Itoh, Y. & Yabuno, R., 2009 Oct 15, In : Physica C: Superconductivity and its applications. 469, 15-20, p. 1849-1852 4 p.

Research output: Contribution to journalArticle

8 Citations (Scopus)
2008

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)

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)

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)

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)

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)

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)

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)

Reflective properties of Mo/Si multilayer for EUV lithography deposited by the magnetron sputtering device with superconducting bulk magnets

Yamaguchi, T., Ikuta, H., Tomofuji, T., Yanagi, Y., Itoh, Y., Oka, T. & Mizutani, U., 2008 Sep 15, In : Physica C: Superconductivity and its applications. 468, 15-20, p. 2170-2173 4 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Study on optimal design of high temperature superconducting coil based on AC loss minimization

Fukui, S., Ohsugi, K., Nishijyo, T., Ogawa, J., Oka, T., Yamaguchi, M., Sato, T., Furuse, M., Takao, T. & Tsukamoto, O., 2008 Jun 1, In : IEEE Transactions on Applied Superconductivity. 18, 2, p. 1366-1369 4 p., 4510854.

Research output: Contribution to journalArticle

6 Citations (Scopus)

Study on performance improvements of a high-temperature superconducting coil with a lattice-shape cross section

Ishiguri, S., Oka, T., Fukui, S., Ogawa, J. & Sato, T., 2008 Jul 15, In : Physica C: Superconductivity and its applications. 468, 14, p. 1028-1031 4 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Study on the performance improvement of the high temperature superconducting coil with several separated coils at the edges

Ishiguri, S., Oka, T., Fukui, S., Ogawa, J. & Sato, T., 2008 Sep 15, In : Physica C: Superconductivity and its applications. 468, 15-20, p. 2152-2155 4 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)
2007

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 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

65 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 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)

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

22 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)

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)

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)

Study on application of magnetic levitation utilizing HTS bulks to spin processors for photo mask production

Fukui, S., Sato, R., Ogawa, J., Oka, T., Yamaguchi, M., Sato, T., Miyazaki, S., Sasahara, T., Tamaki, T., Nishiwaki, S. & Yuki, Y., 2007 Oct 1, In : Physica C: Superconductivity and its applications. 463-465, SUPPL., p. 1289-1292 4 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Study on optimization design of superconducting magnet for magnetic force assisted drug delivery system

Fukui, S., Abe, R., Ogawa, J., Oka, T., Yamaguchi, M., Sato, T. & Imaizumi, H., 2007 Oct 1, In : Physica C: Superconductivity and its applications. 463-465, SUPPL., p. 1315-1318 4 p.

Research output: Contribution to journalArticle

4 Citations (Scopus)

Temperature rise in melt-textured large grain superconducting bulk magnets during their magnetizing operations

Oka, T., Yokoyama, K., Fujishiro, H. & Noto, K., 2007 Sep 1, In : Physica C: Superconductivity and its applications. 460-462 II, SPEC. ISS., p. 748-749 2 p.

Research output: Contribution to journalArticle

8 Citations (Scopus)

Trapped field and temperature rise in rectangular-shaped HTSC bulk magnetized by pulse fields

Tateiwa, T., Sazuka, Y., Fujishiro, H., Hayashi, H., Nagafuchi, T. & Oka, T., 2007 Oct 1, In : Physica C: Superconductivity and its applications. 463-465, SUPPL., p. 398-401 4 p.

Research output: Contribution to journalArticle

8 Citations (Scopus)
2006

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)

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, p. S540-S544

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

132 Citations (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)

Trapped field over 4 tesla on GdBaCuO bulk by pulse field method and magnetizing mechanism

Fujishiro, H., Kaneyama, M., Tateiwa, T. & Oka, T., 2006 Jun 1, In : Journal of Physics: Conference Series. 43, 1, p. 405-408 4 p., 101.

Research output: Contribution to journalArticle

5 Citations (Scopus)
2005

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, p. S72-S76

Research output: Contribution to journalArticle

8 Citations (Scopus)