Tetsuo Oka

  • 1899 Citations
  • 22 h-Index
1990 …2019

Research output per year

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2005

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)

Pulsed field magnetization of a 36 mm diameter single-domain Sm-Ba-Cu-O bulk superconductor at 30, 35 and 77 K

Yanagi, Y., Itoh, Y., Yoshikawa, M., Oka, T., Ikuta, H. & Mizutani, U., 2005 Jun 1, In : Superconductor Science and Technology. 18, 6, p. 839-849 11 p.

Research output: Contribution to journalArticle

39 Citations (Scopus)

Record-high trapped magnetic field by pulse field magnetization using GdBaCuO bulk superconductor

Fuhishiro, H., Kaneyama, M., Tateiwa, T. & Oka, T., 2005 Sep 30, In : Japanese Journal of Applied Physics, Part 2: Letters. 44, 37-41, p. L1221-L1224

Research output: Contribution to journalArticle

37 Citations (Scopus)
15 Citations (Scopus)
2004

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)

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)

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)

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)

Temperature measurement of RE123 bulk superconductors on magnetizing process

Yokoyama, K., Kaneyama, M., Oka, T., Fujishiro, H. & Noto, K., 2004 Oct 1, In : Physica C: Superconductivity and its applications. 412-414, SPEC. ISS., p. 688-694 7 p.

Research output: Contribution to journalArticle

10 Citations (Scopus)

Temperature rise in an Sm-based bulk superconductor after applying iterative pulse fields

Fujishiro, H., Yokoyama, K., Oka, T. & Noto, K., 2004 Jan 1, In : Superconductor Science and Technology. 17, 1, p. 51-57 7 p.

Research output: Contribution to journalArticle

26 Citations (Scopus)
2003

Time evolution and spatial distribution of temperature in YBCO bulk superconductor after pulse field magnetizing

Fujishiro, H., Oka, T., Yokoyama, K. & Noto, K., 2003 Jul 1, In : Superconductor Science and Technology. 16, 7, p. 809-814 6 p.

Research output: Contribution to journalArticle

34 Citations (Scopus)
2002

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)

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)
2001

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)

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)

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

Ishihara, H., Ikuta, H., Itoh, Y., Yanagi, Y., Yoshikawa, M., Oka, T. & Mizutani, U., 2001 Jan 1, In : Physica C: Superconductivity and its applications. 357-360, p. 763-766 4 p.

Research output: Contribution to journalArticle

17 Citations (Scopus)

Synthesis and magnetization of high-Tc bulk superconductors and their application as superconducting permanent magnets

Mizutani, U., Ikuta, H., Oka, T., Itoh, Y., Yanagi, Y. & Yoshikawa, M., 2001 Dec 1, In : International Journal of Applied Electromagnetics and Mechanics. 14, 1-4 SPEC., p. 57-63 7 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)
1999

Recent development in superconducting permanent magnets

Mizutani, U., Oka, T., Itoh, Y. & Ikuta, H., 1999 Dec, In : Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy. 46, 12, p. 1241-1248 8 p.

Research output: Contribution to journalArticle

Synthesis of c-axis oriented single-domain Sm123 superconductors capable of trapping 9 Tesla at 25 K and its application to a strong magnetic field generator

Mizutani, U., Mase, A., Ikuta, H., Yanagi, Y., Yoshikawa, M., Itoh, Y. & Oka, T., 1999 Oct 29, In : Materials Science and Engineering B: Solid-State Materials for Advanced Technology. 65, 1, p. 66-68 3 p.

Research output: Contribution to journalArticle

18 Citations (Scopus)
1998

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

144 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)

Pulsed-field magnetization applied to high-Tc superconductors

Mizutani, U., Oka, T., Itoh, Y., Yanagi, Y., Yoshikawa, M. & Ikuta, H., 1998 Jan 1, In : Applied Superconductivity. 6, 2-5, p. 235-246 12 p.

Research output: Contribution to journalArticle

100 Citations (Scopus)
1997

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, p. L345-L348

Research output: Contribution to journalArticle

15 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)

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)
1996

Pulsed field magnetization of melt-processed Y-Ba-Cu-O bulk superconductor with no weak links

Itoh, Y., Yanagi, Y., Yoshikawa, M., Oka, T., Yamada, Y. & Mizutani, U., 1996 Dec 1, In : Japanese Journal of Applied Physics, Part 2: Letters. 35, 9 B, p. L1173-L1176

Research output: Contribution to journalArticle

7 Citations (Scopus)
1995

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 Oct, In : Japanese Journal of Applied Physics. 34, 10, p. 5574-5578 5 p.

Research output: Contribution to journalArticle

65 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)
1994

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 Dec, In : Physica C: Superconductivity and its applications. 235-240, PART 5, p. 3445-3446 2 p.

Research output: Contribution to journalArticle

10 Citations (Scopus)

The microstructure and superconducting properties of melt-processed YBCO samples containing RE-211 particles

Yanagi, Y., Itoh, Y., Yoshikawa, M., Oka, T., Sasaki, M., Yamada, Y. & Mizutani, U., 1994 Dec, In : Physica C: Superconductivity and its applications. 235-240, PART 1, p. 445-446 2 p.

Research output: Contribution to journalArticle

1992

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)

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)
1991

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)
1990

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)