Direct observation of the dynamics of vortices in high temperature superconducting bulks and development of the strong bulk magnet

• Project/Area Number: 20560001
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Applied materials science/Crystal engineering
• Research Institution: Iwate University
• Principal Investigator: NAITO Tomoyuki 岩手大学, 工学部, 助教 (40311683)
• Co-Investigator(Renkei-kenkyūsha): FUJISHIRO Hiroyuki 岩手大学, 工学部, 教授 (90199315)
• Project Period (FY): 2008 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2009: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2008: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: 超伝導バルク磁石 / パルス着磁 / 磁束ダイナミクス / 磁束ピン止め / 臨界電流密度 / 元素置換効果 / 超伝導バルク

Research Abstract

To study the dynamics of vortices in high temperature superconducting bulks in the pulsed field, both local vortex densities and temperatures were measured. The vortices intruded into the bulk not only at the edges but also at the surfaces. The distribution of the local critical current density which was estimated from the magnetization loop using the small pieces cut from the bulk was consistent with the inhomogeneous trapped magnetic field profiles. The vortices were trapped at the weak /strong pinning region for the low/high applied magnetic field.

Research Products

• [Journal Article] Position dependence of irreversibility line on thin plate Gd-Ba-Cu-O bulk superconductor (2012)
  • Author(s): T. Naito, D. Furuta, T. Arayashiki, H. Fujishiro, Y. Yanagi, and Y. Itoh
  • Journal Title: Physics Procedia Volume: 27 Pages: 168-171
  • Peer Reviewed
• [Journal Article] Position dependence of irreversibility line on thin plate Gd-Ba-Cu-O bulk superconductor (2012)
  • Author(s): T.Naito, D.Furuta, T.Arayashiki, H.Fujishiro, Y.Yanagi, Y.Itoh
  • Journal Title: Physics Procedia Volume: (未定)(掲載確定)
  • Peer Reviewed
• [Journal Article] Direct Jc measurements and trapped field profiles using an identical superconducting bulk (2011)
  • Author(s): H. Fujishiro, T. Naito, D. Furuta, T. Arayashiki, Y. Yanagi, and Y. Itoh
  • Journal Title: Superconductor Science and Technology Volume: 24
  • Peer Reviewed
• [Journal Article] Mechanism of magnetic flux trapping on superconducting bulk magnetized by pulsed field using a vortex-type coil (2011)
  • Author(s): H.Fujishiro, T.Naito, M.Oyama
  • Journal Title: Superconductor Science and Technology Volume: 24
  • Peer Reviewed
• [Journal Article] Direct Jc measurements and trapped field profiles using an identical superconducting bulk (2011)
  • Author(s): H.Fujishiro, D.Furuta, T.Arayashiki, T.Naito, Y.Yanagi, Y.Itoh
  • Journal Title: Superconductor Science and Technology Volume: 24
  • Peer Reviewed
• [Journal Article] Temperature measurements in small holes drilled in HTSC bulk during pulsed field magnetization (2010)
  • Author(s): H. Fujishiro, K. Kakehata, D. Furuta, and T. Naito
  • Journal Title: Physica C Volume: 470 Pages: 1181-1184
  • Peer Reviewed
• [Journal Article] Simulation of temperature and magnetic field distribution in superconducting bulk during pulsed field magnetization (2010)
  • Author(s): H.Fujishiro, T.Naito
  • Journal Title: Superconductor Science and Technology Volume: 23
  • Peer Reviewed
• [Journal Article] Estimation of temperature rise from trapped field gradient on superconducting bulk magnetized by multi-pulse technique (2010)
  • Author(s): H.Fujishiro, T.Naito, K.Kakehata, Y.Yanagi, Y.Itoh
  • Journal Title: Superconductor Science and Technology 23 Pages: 25013-25013
  • Peer Reviewed
• [Journal Article] Vortex pinning properties of (Y1-xLax)-Ba-Cu-O and (Y1-xPrx)-Ba-Cu-O superconducting bulks (2009)
  • Author(s): T. Naito, K. Sato, D. Yamaguchi, and H. Fujishiro
  • Journal Title: Physica C Volume: 469 Pages: 1218-1220
  • Peer Reviewed
• [Journal Article] Pulsed field magnetization for GdBaCuO bulk with stronger pinning characteristics (2009)
  • Author(s): H.Fujishiro, T.Hiyama, T.Miura, T.Naito, S.Nariki, N.Sakai, I.Hirabayashi
  • Journal Title: IEEE Transactions on Applied Superconductivity 19 Pages: 3545-3548
  • NAID: 120001763672
  • Peer Reviewed
• [Journal Article] Enhancement of trapped field and total trapped flux on GdBaCuO bulk by MMPSC-IMRA method (2009)
  • Author(s): H.Fujishiro, T.Hiyama, T.Naito, Y.Yanagi, Y.Itoh
  • Journal Title: Superconductor Science and Technology 22 Pages: 95006-95006
  • Peer Reviewed
• [Journal Article] Enhancement of total trapped fluxes on φ65mm GdBaCuO bulk by multi-pulse techniques (2009)
  • Author(s): H.Fujishiro, K.Kakehata, T.Naito, Y.Yanagi, Y.Itoh
  • Journal Title: Physica C 469 Pages: 1250-1253
  • NAID: 120001613618
  • Peer Reviewed
• [Journal Article] Vortex pinning properties of (Y_<1-x>La_x)-Ba-Cu-O and (Y_<1-x>Pr_x)-Ba-Cu-O superconducting bulks (2009)
  • Author(s): T.Naito, K.Sato, D.Yamaguchi, H.Fujishiro
  • Journal Title: Physica C 469 Pages: 1218-1220
  • Peer Reviewed
• [Journal Article] Trapped field characteristics on .65 mm GdBaCuO bulk by modified multi-pulse technique with stepwise cooling (MMPSC) (2008)
  • Author(s): H. Fujishiro, T. Tateiwa, K. Kakehata, T. Hiyama, T. Naito, and Y. Yanagi
  • Journal Title: Physica C Volume: 468 Pages: 1477-1480
  • Peer Reviewed
• [Journal Article] Thermal conductivity of Er-Ba-Cu-O and Ho-Ba-Cu-O superconducting bulks (2008)
  • Author(s): T. Naito, H. Fujishiro, K. Iida, S. Nariki, and M. Murakami
  • Journal Title: Superconductor Science and Technology Volume: 21
  • Peer Reviewed
• [Journal Article] Anisotropic thermal conductivity of Er-Ba-Cu-O bulk superconductors (2008)
  • Author(s): T. Naito, H. Fujishiro, K. Iida, and M. Murakami
  • Journal Title: Physica C Volume: 468 Pages: 1428-1430
  • Peer Reviewed
• [Journal Article] Thermal Conductivity of Er-Ba-Cu-O and Ho-Ba-Cu-O superconducting bulks (2008)
  • Author(s): T. Naito, H. Fujishiro, K. Jida, S. Nariki, and M. Murakami
  • Journal Title: Superconductor Science and Technology 21
  • Peer Reviewed
• [Journal Article] Possible explanation for trapped field enhancement on REBaCuO bulk by modified multi-pulse technique with stepwise cooling (MMPSC) (2008)
  • Author(s): H. Fujishiro, T. Hiyama, T. Naito, T. Tateiwa, and Y. Yanagi
  • Journal Title: Materials Science and Engineering B 151 Pages: 95-100
  • Peer Reviewed
• [Journal Article] Trapped Field Enhancement of Five-aligned Superconducting Bulk Maanetized by Pulse Field for Magnetic Separation (2008)
  • Author(s): T. Hiyama, H. Fujishiro, T. Tateiwa, T. Naito, H. Hayashi, and K. Tone
  • Journal Title: Physica C 468 Pages: 1469-1472
  • Peer Reviewed
• [Journal Article] Trapped field characteristics on φ65 mm GdBaCuO bulk by modified multi-pulse technique with stepwise cooling (MMPSC) (2008)
  • Author(s): H. Fujishiro, T. Tateiwa, K. Kakehata, T. Hiyama, T. Naito, and Y. Yanagi
  • Journal Title: Physica C 468 Pages: 1477-1480
  • Peer Reviewed
• [Journal Article] Anisotropic Thermal Conductivity of Er-Ba-Cu-O Bulk Superconductors (2008)
  • Author(s): T. Naito, H. Fujishiro, K. Iida, and M. Murakami
  • Journal Title: Physica C 468 Pages: 1428-1430
  • Peer Reviewed
• [Presentation] Position dependence of irreversibility line on thin Gd-Ba-Cu-O bulk superconductor (2011)
  • Author(s): T. Naito
  • Organizer: 24th International Symposium on Superconductivity (ISS2011)
  • Place of Presentation: Tower Hall Funabori (Tokyo)
  • Year and Date: 2011-10-26
• [Presentation] Position dependence of irreversibility line on thin plate Gd-Ba-Cu-O bulk superconductor (2011)
  • Author(s): T.Naito, D.Furuta, T.Arayashiki, H.Fujishiro, Y.Yanagi, Y.Itoh
  • Organizer: 24^<th> International Symposium on Superconductivity
  • Place of Presentation: タワーホール船堀(東京都)
  • Year and Date: 2011-10-26
• [Presentation] Thermal Transport and vortex pinning Properties in (Dy, RE)-Ba-Cu-O (RE=La, Pr, Gd) bulk superconductors (2010)
  • Author(s): T. Naito
  • Organizer: 23rd International Symposium on Superconductivity (ISS2010)
  • Place of Presentation: Epochal Tsukuba (Tsukuba)
  • Year and Date: 2010-11-03
• [Presentation] Thermal Transport and vortex pinning Properties in (Dy,RE)-Ba-Cu-O (RE=La, Pr, Gd) bulk superconductors (2010)
  • Author(s): T.Naito, Y.Kikuchi, H.Fujishiro
  • Organizer: 23rd International Symposium on Superconductivity
  • Place of Presentation: エポカルつくば(茨城県)
  • Year and Date: 2010-11-03
• [Presentation] パルス着磁における超伝導バルク細孔内部の温度測定 (2009)
  • Author(s): 藤代博之、古田大樹、内藤智之
  • Organizer: 第81回2009年度秋季低温工学・超電導学会
  • Place of Presentation: 岡山大学(岡山県)
  • Year and Date: 2009-11-18
• [Presentation] Temperature measurements in small holes drilled in superconducting bulk during pulsed field magnetization (2009)
  • Author(s): H. Fujishiro
  • Organizer: 22nd International Symposium on Superconductivity (ISS2009)
  • Place of Presentation: Epochal Tsukuba (Tsukuba)
  • Year and Date: 2009-11-03
• [Presentation] Temperature measurements in small holes drilled in superconducting bulk during pulsed field magnetization (2009)
  • Author(s): H.Fujishiro, T.Naito, D.Furuta, K.Kakehata
  • Organizer: 22nd International Symposium on Superconductivity
  • Place of Presentation: エポカルつくば(茨城県)
  • Year and Date: 2009-11-03
• [Presentation] 複数パルス磁場印加による大型超伝導バルクの総磁束量の増大効果 (2009)
  • Author(s): 藤代博之、欠端浩介、内藤智之、柳陽介、伊藤佳孝
  • Organizer: 第80回2009年度春季低温工学・超電導学会
  • Place of Presentation: 早稲田大学(東京都)
  • Year and Date: 2009-05-13
• [Presentation] (Y<1-x>RE_x)BCO (RE=La, Pr)超伝導バルクの作製と評価II (2008)
  • Author(s): 佐藤清知、山口大吾、内藤智之、藤代博之
  • Organizer: 2008年度秋季低温工学・超電導学会
  • Place of Presentation: 高知県高知市高知市文化プラザ
  • Year and Date: 2008-11-12
• [Presentation] Vortex pinning properties of (Y1-xLax)-Ba-Cu-O and (Y1-xPrx)-Ba-Cu-O superconducting bulks (2008)
  • Author(s): T. Naito
  • Organizer: 21st International Symposium on Superconductivity (ISS2008)
  • Place of Presentation: Epochal Tsukuba (Tsukuba)
  • Year and Date: 2008-10-29
• [Presentation] Enhancement of total trapped fluxes on φ65 mm GdBaCuO bulk by multi-pulse techniques (2008)
  • Author(s): H. Fujishiro, K. Kakehata, T. Naito, Y. Yanagi, and Y. Itoh
  • Organizer: 21st International Symposium on Superconductivity (ISS2008)
  • Place of Presentation: 茨城県つくば市つくば国際会議場
  • Year and Date: 2008-10-29
• [Presentation] Vortex Pinning Properties of (Y_<1-x>Lax)-Ba-Cu-O and (Y_<1-x>Prx)-Ba-Cu-O Superconducting Bulks (2008)
  • Author(s): T. Naito, K. Sato, D. Yamaguchi, and H. Fujishiro
  • Organizer: 21st International Symposium on Superconductivity (ISS 2008)
  • Place of Presentation: 茨城県つくば市つくば国際会議場
  • Year and Date: 2008-10-29
• [Presentation] Pulsed Field Magnetization for GdBaCuO Bulk with Stronger Pinning Characteristics (2008)
  • Author(s): H. Fujishiro, T. Hiyama, T. Miura, T. Naito, S. Nariki, N. Sakai and I. Hirabayashi
  • Organizer: 2008 Applied Superconductivity Conference
  • Place of Presentation: アメリカ合衆国イリノイ州シカゴハイアットリージェンシーシカゴ
  • Year and Date: 2008-08-20
• [Presentation] 強いピン止め力を有する超伝導バルクへのパルス着磁 (2008)
  • Author(s): 藤代博之
  • Organizer: 2008年度春季低温工学・超電導学会
  • Place of Presentation: 明星大学(東京都)
  • Year and Date: 2008-05-26
• [Presentation] (Y_<1-x>RE_x)BCO(RE=La,Pr)超伝導バルクの作製と評価 (2008)
  • Author(s): 佐藤清知、山口大吾、内藤智之藤代博之
  • Organizer: 2008年度春季低温工学・超電導学会
  • Place of Presentation: 東京都日野市 明星大学日野キャンパス
  • Year and Date: 2008-05-26
• [Presentation] 強いピン止め力を有する超伝導バルクへのパルス着磁 (2008)
  • Author(s): 藤代博之、日山拓也、三浦崇内藤智之
  • Organizer: 2008年度春季低温工学・超電導学会
  • Place of Presentation: 東京都日野市 明星大学日野キャンパス
  • Year and Date: 2008-05-26
• [Remarks]
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• [Remarks]
  • URL: http://ikebehp.mat.iwate-u.ac.jp/
• [Remarks]
  • URL: http://ikebehp.mat.iwate-u.ac.jp/