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Study of Unconventional Superconductivity in Pr based Cage Compounds by High-Speed Calorimetry

Research Project

Project/Area Number 16K17734
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Condensed matter physics II
Research InstitutionTohoku University

Principal Investigator

Kihara Takumi  東北大学, 金属材料研究所, 助教 (80733021)

Project Period (FY) 2016-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Keywords極低温 / 強磁場 / 強相関電子系 / 比熱 / 磁気熱量効果 / 物性物理学 / 磁性 / 熱量測定
Outline of Final Research Achievements

We developed a high-speed calorimetry system, which can be combined with high field magnet and dilution refrigerator. This system can measure a heat capacity within 0.1 second at low temperatures and high magnetic fields, and therefore, it enables us to measure the heat capacity with the removal of delayed contribution of nuclear spins. We originally planned to study the unconventional superconductivity in Pr based cage compounds by the developed system. However, since the lowest achieved temperature of the sample is higher than expected, the continual improvement of the measurement system is still needed.
On the other hand, taking advantage of the high-speed measurement of the present system, we carried out the heat capacity measurements for Heusler alloys NiCoMnGa. The results indicate that the magnetocaloric properties of NiCoMnGa is different from other compounds.

Report

(3 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • 2016 Research-status Report
  • Research Products

    (7 results)

All 2018 2017 2016

All Presentation (6 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results) Book (1 results)

  • [Presentation] ホイスラー合金Ni50-xCoxMn31.5Ga18.5(x=9, 11)の磁場誘起オーステナイト相における負の磁気熱量効果2018

    • Author(s)
      木原工, 許皛, 三宅厚志, 徳永将史, 三田村裕幸, 安達義也, 鹿又武
    • Organizer
      日本物理学会
    • Related Report
      2017 Annual Research Report
  • [Presentation] MAGNETOCALORIC EFFECTS OF METAMAGNETIC SHAPE-MEMOLY ALLOYS NiCoMnIn and NiCoMnGa IN PULSED-HIGH-MAGNETIC FIELDS UP TO 56 T2017

    • Author(s)
      T. Kihara, X. Xu, W. Ito, R. Kainuma, A. Miyake, Y. Adachi, T. Kanomata, and M. Tokunaga
    • Organizer
      Moscow International Symposium on Magnetism
    • Place of Presentation
      モスクワ(ロシア)
    • Year and Date
      2017-07-01
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Direct Measurements of Magnetocaloric Effects in Metamagnetic Shape-Memory Alloys NiCoMnIn and NiCoMnGa under Pulsed-High-Magnetic Fields up to 56 T2017

    • Author(s)
      T. Kihara, X. Xu, W. Ito, R. Kainuma, A. Miyake, Y. Adachi, T. Kanomata, and M. Tokunaga
    • Organizer
      Annual world congress of smart materials 2017
    • Place of Presentation
      バンコク(タイ)
    • Year and Date
      2017-03-16
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] パルス及び定常強磁場を用いた巨大磁気熱量効果の研究2017

    • Author(s)
      木原工, 三宅厚志, 徳永将史, 許皛, 伊東航, 貝沼亮介, 安達義也, 鹿又武
    • Organizer
      強磁場研究会2017
    • Related Report
      2017 Annual Research Report
  • [Presentation] ホイスラー合金NiCoMnGaの磁場誘起マルテンサイト変態に伴う磁気熱量効果2017

    • Author(s)
      木原工, 三宅厚志, 徳永将史, 安達義也, 鹿又武
    • Organizer
      日本物理学会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 極低温・強磁場下で動作する高速比熱測定装置の開発2016

    • Author(s)
      木原工, 小濱芳允, 徳永将史
    • Organizer
      日本物理学会
    • Place of Presentation
      金沢大学
    • Year and Date
      2016-09-13
    • Related Report
      2016 Research-status Report
  • [Book] Shape memory alloys2017

    • Author(s)
      T. Kihara, X. Xu, W. Ito, R. Kainuma, Y. Adachi, T. Kanomata, and M. Tokunaga
    • Publisher
      InTech
    • Related Report
      2016 Research-status Report

URL: 

Published: 2016-04-21   Modified: 2019-03-29  

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