• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Elucidation and search for new quantum states in ferromagnetic quantum critical endpoint

Research Project

Project/Area Number 24340085
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypePartial Multi-year Fund
Section一般
Research Field Condensed matter physics II
Research InstitutionKobe University

Principal Investigator

KOTEGAWA Hisashi  神戸大学, 理学(系)研究科(研究院), 准教授 (30372684)

Co-Investigator(Kenkyū-buntansha) TOU Hideki  神戸大学, 大学院理学研究科, 教授 (60295467)
Co-Investigator(Renkei-kenkyūsha) SUGAWARA Hitoshi  神戸大学, 大学院理学研究科, 教授 (60264587)
MATSUDA Tatsuma  首都大学東京, 大学院理工学研究科, 准教授 (30370472)
Project Period (FY) 2012-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥20,410,000 (Direct Cost: ¥15,700,000、Indirect Cost: ¥4,710,000)
Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2012: ¥15,860,000 (Direct Cost: ¥12,200,000、Indirect Cost: ¥3,660,000)
Keywords強磁性 / 量子臨界点 / メタ磁性 / 超伝導 / 圧力 / 量子臨界終点 / メタ磁性転移 / UCoAl / NMR / CeIr_3B_2 / CeRuPO
Outline of Final Research Achievements

We have investigated microscopic states and details of magnetic fluctuation for UCoAl and URhGe which possess a ferromagnetic quantum critical endpoint, by means of nuclear magnetic resonance (NMR). As a result, we have succeeded to observe a development of strong magnetic fluctuations in the vicinity of the quantum critical endpoint of both compounds. The observed magnetic fluctuations are conjectured to play important role for field-induced superconductivity in URhGe.
We have also found a metamegnetic transition which appears under pressure in ferromagnet CeRuPO, and ferromagnetic critical point in CeIr3B2. For helimagnet CrAs, we have found pressure-induced superconductivity. From nuclear quadrupole resonance (NQR) measurements, we have obtained the results indicating that superconductivity in CrAs is mediated by magnetic fluctuations, and that CrAs is the first Cr-based unconventional superconductor.

Report

(4 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Annual Research Report
  • 2012 Annual Research Report
  • Research Products

    (24 results)

All 2015 2014 2013 2012 Other

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Acknowledgement Compliant: 3 results) Presentation (19 results) (of which Invited: 1 results)

  • [Journal Article] 73Ge-Nuclear Magnetic Resonance/Nuclear Quadrupole Resonance Investigation of Magnetic Properties of URhGe2015

    • Author(s)
      H. Kotegawa, K. Fukumoto, T. Toyama, H. Tou, H. Harima, A. Harada, Y. Kitaoka, Y. Haga, E. Yamamoto, Y. Onuki, K. M. Itoh, and E. E. Haller
    • Journal Title

      J. Phys. Soc. Jpn.

      Volume: 84 Issue: 5 Pages: 054710-054710

    • DOI

      10.7566/jpsj.84.054710

    • NAID

      210000133562

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Detection of an Unconventional Superconducting Phase in the Vicinity of the Strong First-Order Magnetic Transition in CrAs Using 75As-Nuclear Quadrupole Resonance2015

    • Author(s)
      H. Kotegawa, S. Nakahara, R. Akamatsu, H. Tou, H. Sugawara, and H. Harima
    • Journal Title

      Phys. Rev. Lett.

      Volume: 114 Issue: 11

    • DOI

      10.1103/physrevlett.114.117002

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Superconductivity of 2.2 K under Pressure in Helimagnet CrAs2014

    • Author(s)
      H. Kotegawa, S. Nakahara, H. Tou, H. Sugawara
    • Journal Title

      J. Phys. Soc. Jpn.

      Volume: 83 Issue: 9 Pages: 093702-093702

    • DOI

      10.7566/jpsj.83.093702

    • NAID

      210000133240

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Pressure-Thmperature-Magnetic Field Phase Diagram of Ferromagnetic Kondo Lattice CeRuPO2013

    • Author(s)
      H. Kotegawa, et al.
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 82 Issue: 12 Pages: 123711-123711

    • DOI

      10.7566/jpsj.82.123711

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Pressure evolution of the metamagnetic transition in UCoAl As measured using 59Co NMR2013

    • Author(s)
      H. Kotegawa, H. Nohara, H. Tou, T. D. Matsuda, E. Yamamoto, Y. Haga, Z. Fisk, Y. Onuki, D. Aoki, and J. Flouquet
    • Journal Title

      J. Korean Phys. Soc.

      Volume: 63 Issue: 3 Pages: 341-344

    • DOI

      10.3938/jkps.63.341

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed
  • [Presentation] ヘリカル磁性体CrAsの圧力誘起超伝導とNQR測定2015

    • Author(s)
      小手川恒,中原真悟,藤秀樹,菅原仁,播磨尚朝
    • Organizer
      京大基研研究会
    • Place of Presentation
      京都大学
    • Year and Date
      2015-06-09 – 2015-06-10
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Presentation] 圧力誘起超伝導体CrAsのNQRによる研究2015

    • Author(s)
      小手川恒,中原真悟,赤松類,藤秀樹,西脇大平,菅原仁,播磨尚朝
    • Organizer
      日本物理学会
    • Place of Presentation
      早稲田大学
    • Year and Date
      2015-03-21 – 2015-03-24
    • Related Report
      2014 Annual Research Report
  • [Presentation] CeRuPOの圧力下で現れるメタ磁性転移に関する研究2014

    • Author(s)
      外山智大,北川俊作,小手川恒,藤秀樹,西脇大平,山内良太,松岡英一,菅原仁
    • Organizer
      日本物理学会
    • Place of Presentation
      中部大学
    • Year and Date
      2014-09-07 – 2014-09-10
    • Related Report
      2014 Annual Research Report
  • [Presentation] 遍歴強磁性体URhGeの磁場誘起超伝導相近傍におけるNMR測定2014

    • Author(s)
      福本健太,小手川恒,藤秀樹,播磨尚朝,芳賀芳範,山本悦嗣,大貫惇睦,青木大,伊藤公平,E.E.Haller
    • Organizer
      日本物理学会
    • Place of Presentation
      中部大学
    • Year and Date
      2014-09-07 – 2014-09-10
    • Related Report
      2014 Annual Research Report
  • [Presentation] ヘリカル磁性体CrAsの圧力印加による磁性 非磁性転移の研究2014

    • Author(s)
      中原真悟,小手川恒,藤秀樹,菅原仁
    • Organizer
      日本物理学会
    • Place of Presentation
      中部大学
    • Year and Date
      2014-09-07 – 2014-09-10
    • Related Report
      2014 Annual Research Report
  • [Presentation] 超伝導体La(O,F)BiS2とLa(O,F)BiSe2のNMR/NQRによる研究2014

    • Author(s)
      清水祐貴,赤松類,小手川恒,藤秀樹,井澤宏輝,水口佳一,三浦大介,浅野卓也,東中隆二,松田達磨,青木勇二,田中将嗣,長尾雅則,高野義彦
    • Organizer
      日本物理学会
    • Place of Presentation
      中部大学
    • Year and Date
      2014-09-07 – 2014-09-10
    • Related Report
      2014 Annual Research Report
  • [Presentation] La(O,F)BiS2の圧力下でのホール効果測定2014

    • Author(s)
      秋田星二,北川俊作,小手川恒,藤秀樹,井澤宏輝,水口佳一,三浦大介,浅野卓也,東中隆二,松田達磨,青木勇二,長尾雅則,高野義彦
    • Organizer
      日本物理学会
    • Place of Presentation
      中部大学
    • Year and Date
      2014-09-07 – 2014-09-10
    • Related Report
      2014 Annual Research Report
  • [Presentation] 強磁性体CeIr_3B_2の圧力下NMR測定2013

    • Author(s)
      村上晃一, 小手川恒, 他
    • Organizer
      日本物理学会
    • Place of Presentation
      広島大学
    • Year and Date
      2013-03-29
    • Related Report
      2012 Annual Research Report
  • [Presentation] UCoAlの量子臨界終点近傍における圧力下NMR2013

    • Author(s)
      明比亮介, 小手川恒, 他
    • Organizer
      日本物理学会
    • Place of Presentation
      広島大学
    • Year and Date
      2013-03-29
    • Related Report
      2012 Annual Research Report
  • [Presentation] 強相関電子系における圧力をパラメータとした新奇量子相の研究2013

    • Author(s)
      小手川恒, 他
    • Organizer
      日本物理学会
    • Place of Presentation
      広島大学
    • Year and Date
      2013-03-26
    • Related Report
      2012 Annual Research Report
  • [Presentation] UCoAlの量子臨界点近傍におけるNMR2012

    • Author(s)
      明比亮介, 小手川恒, 他
    • Organizer
      日本物理学会
    • Place of Presentation
      横浜国立大学
    • Year and Date
      2012-09-20
    • Related Report
      2012 Annual Research Report
  • [Presentation] CeIr_3B_2のNMRと圧力効果2012

    • Author(s)
      村上晃一, 小手川恒, 他
    • Organizer
      日本物理学会
    • Place of Presentation
      横浜国立大学
    • Year and Date
      2012-09-20
    • Related Report
      2012 Annual Research Report
  • [Presentation] 73Ge-NMRによるURhGeの磁気揺らぎの研究

    • Author(s)
      小手川恒,福本健太,外山智大,北川俊作,藤秀樹,播磨尚朝,芳賀芳範,山本悦嗣,大貫惇睦,青木大,伊藤公平,E.E.Haller
    • Organizer
      日本物理学会
    • Place of Presentation
      東海大学
    • Related Report
      2013 Annual Research Report
  • [Presentation] 強磁性体CeRuPOの電気抵抗測定による相図作成

    • Author(s)
      外山智大,北川俊作,小手川恒,藤秀樹,西脇太平,山内良太,松岡英一,菅原仁
    • Organizer
      日本物理学会
    • Place of Presentation
      東海大学
    • Related Report
      2013 Annual Research Report
  • [Presentation] 31P-NMRでみる重い電子系強磁性体CeRuPOにおける磁気ゆらぎの圧力変化

    • Author(s)
      北川俊作,外山智大,小手川恒,藤秀樹,山内良太,松岡英一,菅原仁
    • Organizer
      日本物理学会
    • Place of Presentation
      東海大学
    • Related Report
      2013 Annual Research Report
  • [Presentation] 強磁性体CeRuPOの温度-圧力-磁場の3次元相図の作成

    • Author(s)
      外山智大,小手川恒,菅原仁,松岡英一,山内良太
    • Organizer
      日本物理学会
    • Place of Presentation
      徳島大学
    • Related Report
      2013 Annual Research Report
  • [Presentation] 強磁性体CeIr3B2の圧力効果とNMR測定

    • Author(s)
      村上晃一,小手川恒,久保田和宏,永島壮太,菅原仁,藤秀樹
    • Organizer
      日本物理学会
    • Place of Presentation
      徳島大学
    • Related Report
      2013 Annual Research Report
  • [Presentation] UCoAlの圧力下NMR測定

    • Author(s)
      明比亮介,小手川恒,野原弘貴,藤秀樹,松田達磨,山本悦嗣,芳賀芳範,Zachary Fisk,大貫惇睦,青木大,Jacques Flouquet
    • Organizer
      日本物理学会
    • Place of Presentation
      徳島大学
    • Related Report
      2013 Annual Research Report
  • [Presentation] 重い電子系強磁性体CeRuPOにおける圧力下31P-NMR

    • Author(s)
      北川俊作,小手川恒,藤秀樹,山内良太,松岡英一,菅原仁
    • Organizer
      日本物理学会
    • Place of Presentation
      徳島大学
    • Related Report
      2013 Annual Research Report

URL: 

Published: 2012-04-24   Modified: 2020-05-15  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi