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Investigation on aliovalent doping effect in nickelates with infinite structures using epitaxial thin films

Research Project

Project/Area Number 20H02435
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 26020:Inorganic materials and properties-related
Research InstitutionTokyo Institute of Technology

Principal Investigator

Matsuda Akifumi  東京工業大学, 物質理工学院, 准教授 (80621698)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2022: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2020: ¥8,060,000 (Direct Cost: ¥6,200,000、Indirect Cost: ¥1,860,000)
Keywordsニッケル酸塩 / エピタキシャル薄膜 / 異原子価置換 / 層状ペロブスカイト構造 / Ruddlesden-Popper構造 / トポタキシャル相変態 / 水素還元 / 固相エピタキシー / トポケミカル還元 / 無限層構造
Outline of Research at the Start

NiーO無限層構造をもつニッケル酸塩結晶において新たに超伝導転移発現が見出された。本研究では特異的な二次元・一次元のNiーO無限構造をもつニッケル酸塩結晶について,異方性結晶内の異原子価置換による構造制御とキャリアドープや物性との相関を明らかにする。平面正方配位NiO4型の無限層,およびNiO4プリズム・NiO6ペロブスカイト無限鎖構造をもつニッケル酸塩結晶ついてレーザープロセスとトポケミカル還元を併用したエピタキシャル薄膜創製,局所構造・電子構造解析のアプローチを用い,異原子価イオン置換がNiーO無限構造の局所・電子構造に及ぼす影響の解明と,物性制御と材料設計の指針創出を目指すものである。

Outline of Final Research Achievements

Ruddlesden-Popper phase crystals (RP type, An+1BnO3n+1) have layered perovskite structures with, in which conductivity control by the layer number “n” and superconductivity in related materials have been found. However, the correlation between structures and conduction properties in multilayer crystals with n=2 or more and the effect of aliovalent substitution are expected to be elucidated regarding the mechanism different from that of its cuprate system. In this research, epitaxial thin films of La3Ni2O7(001)[110]//LaAlO3(100)[001] (n=2, Ni2.5+) and La4Ni3O10(001)[110]//NdGaO3(110)[001] (n=3, Ni2.67+) was developed, and control of their semiconducting conductivity by (Sn, Hf)-doping and reduction was found. LaNiO3(100)[001]//LaAlO3(100)[010] (n=∞, Ni3+) epitaxial thin films were also developed. Increase in metallic conductivity via electron doping and thickness reduction as well as further topochemical reduction to LaNiO2(100) crystals (Ni+) were obtained.

Academic Significance and Societal Importance of the Research Achievements

層状ペロブスカイトRuddlesden-Popper型(RP型、An+1BnO3n+1)はab面内に無限の広がりをもち、層数nによる導電性制御、関連材料の超伝導発現も見出された。しかし、n=2以上の多層結晶における構造と伝導特性の相関や、異原子価置換による効果は、その銅酸化物系と異なる機構に関する起源の解明が期待されている。本研究は、層状型ニッケル酸塩においてn選択的にエピタキシャル薄膜を創製し、新たに4価原子置換による構造・導電性変化、また二次元構造をもつ結晶へのトポケミカル還元を見出すことにより、Ruddlesden-Popper型結晶の異原子価置換による物性制御と材料設計に迫った。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (25 results)

All 2023 2022 2021 2020

All Presentation (25 results) (of which Int'l Joint Research: 11 results,  Invited: 2 results)

  • [Presentation] LaNiO3エピタキシャル薄膜の構造・物性への4価ドーピング効果2023

    • Author(s)
      河村和哉, 後藤裕己, 金子健太, 金子智, 吉本護, 松田晃史
    • Organizer
      第70回応用物理学会春季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 真空紫外光励起酸素によるエピタキシャル酸化コバルト薄膜の室温トポタキシャル相変化2023

    • Author(s)
      金子健太, 庄司拓貴, 喬宇馳, 大賀友瑛, 金子智, 吉本護, 松田 晃史
    • Organizer
      日本セラミックス協会 2023年年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Phase-Selective Heteroepitaxy of Tetravalent-Doped Ruddlesden-Popper Structure Lan+1NinO3n+1 Thin Films2022

    • Author(s)
      Akifumi Matsuda, Yuki Goto, Kazuya Kawamura, Kenta Kaneko, Satoru Kaneko, Mamoru Yoshimoto
    • Organizer
      2022 MRS Fall Meeting and Exhibits
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Electric Conductivity and Structural Modification of Cobalt Oxide Epitaxial Thin Film at Surface by Excimer Vacuum-Ultraviolet Light Irradiation2022

    • Author(s)
      Kenta Kaneko, Hiroki Shoji, Tomoaki Oga, Yuchi Qiao, Satoru Kaneko, Mamoru Yoshimoto, Akifumi Matsuda
    • Organizer
      2022 MRS Fall Meeting and Exhibits
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Rapid Solid Phase Epitaxy of Wide-Bandgap oxide Semiconductor thin films by way of excimer laser processing2022

    • Author(s)
      Akifumi Matsuda
    • Organizer
      IUMRS-ICAM 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Electric conductivity and structure of epitaxial pure NiO thin films controlled by post-depositional irradiation of vacuum-ultraviolet light2022

    • Author(s)
      Kenta Kaneko, Hiroki Shoji, Tomoaki Oga, Satoru Kaneko, Mamoru Yoshimoto, Akifumi Matsuda
    • Organizer
      IUMRS-ICYRAM 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Room-temperature heteroepitaxy of functional oxide nanomaterials with the use of excimer laser processing2022

    • Author(s)
      Akifumi Matsuda
    • Organizer
      IUMRS-ICYRAM 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Epitaxial growth of aliovalent-doped Ruddlesden-Popper phase layered La3Ni2O7 thin films on LaAlO3 substrates2022

    • Author(s)
      Yuki Goto, Shohei Hisatomi, Kenta Kaneko, Tomoaki Oga, Satoru Kaneko, Mamoru Yoshimoto, Akifumi Matsuda
    • Organizer
      IUMRS-ICYRAM 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Crystal Orientation Dependent Conductivity Improvement of Pure NiO Epitaxial Thin-Film Surface by Irradiation of Excimer Vacuum-ultraviolet Light2022

    • Author(s)
      Kenta Kaneko, Tomoaki Oga, Yuki Goto, Hiroki Shoji, Satoru Kaneko, Mamoru Yoshimoto, Akifumi Matsuda
    • Organizer
      2022 MRS Spring Meeting & Exhibit
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] La3Ni2O7エピタキシャル薄膜のアニールによる構造制御2022

    • Author(s)
      後藤祐己, 河村和哉, 金子健太, 金子智, 吉本護, 松田晃史
    • Organizer
      第42回電子材料研究討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] La3Ni2O7薄膜のエピタキシャル成長と還元アニールによる層状構造制御2022

    • Author(s)
      後藤祐己, 河村和哉, 金子健太, 金子智, 吉本護, 松田晃史
    • Organizer
      第83回応用物理学会秋季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 真空紫外光照射によるエピタキシャル酸化コバルト薄膜の結晶相変化2022

    • Author(s)
      金子健太, 庄司拓貴, 喬宇馳, 大賀友瑛, 金子智, 吉本護, 松田晃史
    • Organizer
      第83回応用物理学会秋季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] エピタキシャル酸化コバルト薄膜の構造・物性に及ぼす真空紫外光照射の影響2022

    • Author(s)
      金子健太, 庄司拓貴, 大賀友瑛, 喬宇馳, 金子智, 吉本護, 松田晃史
    • Organizer
      日本セラミックス協会 第35回秋季シンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] PLD法によるLan+1NinO3n+1エピタキシャル薄膜合成と異原子価ドーピングの影響2022

    • Author(s)
      後藤祐己, 久富翔平, 大賀友瑛, 金子智, 吉本護, 松田晃史
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Vacuum ultraviolet excimer light-induced electric conductivity improvement of epitaxial NiO thin films grown at room-temperature2021

    • Author(s)
      Kenta Kaneko, Yuki Goto, Tomoaki Oga, Satoru Kaneko, Mamoru Yoshimoto, Akifumi Matsuda
    • Organizer
      Materials Research Meeting 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Heteroepitaxy and Property of Triple-Layered Ruddlesden-Popper Phase Lan+1NinO3n+1 with Tetravalent-Dopants2021

    • Author(s)
      Akifumi Matsuda, Shohei Hisatomi, Yuki Goto, Satoru Kaneko, Mamoru Yoshimoto
    • Organizer
      2021 MRS Fall Meeting & Exhibit
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Vacuum-Ultraviolet Excimer Light Derived Conductivity and Structural Modification of Pure NiO Epitaxial Thin Films2021

    • Author(s)
      Kenta Kaneko, Tomoaki Oga, Hiroki Shoji, Shohei Hisatomi, Satoru Kaneko, Mamoru Yoshimoto, and Akifumi Matsuda
    • Organizer
      2021 MRS Fall Meeting & Exhibit
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 真空紫外光照射によるNiOエピタキシャル薄膜の導電性制御と結晶配向面依存性2021

    • Author(s)
      金子健太, 庄司拓貴, 大賀友瑛, 金子智, 吉本護, 松田晃史
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] エピタキシャルNiO薄膜へのエキシマ真空紫外光照射による導電性制御・構造変化2021

    • Author(s)
      金子健太, 庄司拓貴, 大賀友瑛, 金子智, 吉本護, 松田晃史
    • Organizer
      日本セラミックス協会 2022年年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] SrTiO3基板上NiO系薄膜のPLD合成と大気圧酸素アニール効果2021

    • Author(s)
      後藤祐己, 久富翔平, 大賀友瑛, 金子健太, 金子智, 吉本護, 松田晃史
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 異原子価ドープ層状La-Ni-O系エピタキシャル薄膜のPLD合成および特性評価2021

    • Author(s)
      久富翔平, 後藤祐己, 大賀友瑛, 金子智, 吉本護, 松田晃史
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] エピタキシャルNiO薄膜の物性および構造に及ぼすエキシマ真空紫外光照射の影響2021

    • Author(s)
      金子健太, 庄司拓貴, 大賀友瑛, 金子智, 吉本護, 松田晃史
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 真空紫外光照射によるNiOエピタキシャル薄膜の構造・物性への影響2021

    • Author(s)
      金子健太, 庄司拓貴, 金子智, 吉本護, 松田晃史
    • Organizer
      日本セラミックス協会
    • Related Report
      2021 Annual Research Report
  • [Presentation] PLDおよびO2アニールによる異原子価ドープ層状ペロブスカイト型La-Ni-O薄膜の作製2021

    • Author(s)
      久富翔平,生田貴大,大賀友瑛,金子智,松田晃史,吉本護
    • Organizer
      日本セラミックス協会 2021年年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Effect of aliovalent doping on epitaxial growth, structure and properties of triple-layered Ruddlesden-Popper phase lanthanum nickelate2020

    • Author(s)
      Akifumi Matsuda, Tomoaki Oga, Shohei Hisatomi, Nobuo Tsuchimine, Satoru Kaneko, and Mamoru Yoshimoto
    • Organizer
      2020 MRS Spring/Fall Meeting & Exhibit
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research

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Published: 2020-04-28   Modified: 2024-01-30  

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