Clarification of growth mechanism of high-quality iron-based superconductor films and construction of growth technique of films exhibiting high performance

• Project/Area Number: 25709058
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Inorganic materials/Physical properties
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: Hiramatsu Hidenori 東京工業大学, 科学技術創成研究院, 准教授 (80598136)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥26,130,000 (Direct Cost: ¥20,100,000、Indirect Cost: ¥6,030,000); Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000); Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2014: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000); Fiscal Year 2013: ¥19,240,000 (Direct Cost: ¥14,800,000、Indirect Cost: ¥4,440,000)
• Keywords: パルスレーザー堆積法 / エピタキシャル成長 / 超伝導 / 磁束ピニング / 臨界電流

Outline of Final Research Achievements

Using pulsed laser deposition (PLD) employing 4 types of pulsed lasers, we explored the growth condition to obtain high quality BaFe2As2:Co thin films, and found that the optimum growth rate is constant to be 0.3nm/sec even if we employ different pulsed lasers for PLD. Further, we applied this optimized process to growth of BaFe2As2:P that we can expect higher critical temperature (~30 K) than that of BaFe2As2:Co (~20 K). Consequently, we succeeded in achieving high-performance critical current density of 7 MA/cm2, which is almost the same as the level of the final target (10 MA/cm2) for this research. Additionally, we fabricated the films on practically applied metal-tape substrates and achieved high performance practical level Jc of 0.1 MA/cm2 at 15 T.

Research Products

• [Int'l Joint Research] ツービンゲン大学(ドイツ)
• [Int'l Joint Research] University of Tubingen(Germany)
• [Journal Article] High-field transport properties of a P-doped BaFe2As2 film on technical substrate (2017)
  • Author(s): K. Iida, H. Sato, C. Tarantini, J. Hänisch, J. Jaroszynski, H. Hiramatsu, B. Holzapfel, and H. Hosono
  • Journal Title: Sci. Rep. Volume: 7 Issue: 1
  • DOI: 10.1038/srep39951
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Key Factors for Insulator-Superconductor Transition in FeSe Thin Films by Electric Field (2017)
  • Author(s): K. Hanzawa, H. Sato, H. Hiramatsu, T. Kamiya, and H. Hosono
  • Journal Title: IEEE Trans. Appl. Supercond. Volume: 27 Issue: 4 Pages: 1-5
  • DOI: 10.1109/tasc.2016.2639738
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] BaFe2(As1-xPx)2 (x = 0.22-0.42) thin films grown on practical metal-tape substrates and their critical current densities (2017)
  • Author(s): H. Hiramatsu, H. Sato, T. Kamiya, and H. Hosono
  • Journal Title: Supercond. Sci. Technol. Volume: 30 Issue: 4 Pages: 044003-044003
  • DOI: 10.1088/1361-6668/aa621c
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Novel solid-phase epitaxy for multi-component materials with extremely high vapor pressure elements: An application to KFe2As2 (2016)
  • Author(s): T. Hatakeyama, H. Sato, H. Hiramatsu, T. Kamiya and H. Hosono
  • Journal Title: Appl. Phys. Express Volume: 9 Issue: 5 Pages: 055505-055505
  • DOI: 10.7567/apex.9.055505
  • Peer Reviewed
• [Journal Article] Electric field-induced superconducting transition of an insulating FeSe thin film at 31 K (2016)
  • Author(s): K. Hanzawa, H. Sato, H. Hiramatsu, T. Kamiya, and H. Hosono
  • Journal Title: National Academy of Sciences of the United States of America Volume: 113 Issue: 15 Pages: 3986-3990
  • DOI: 10.1073/pnas.1520810113
  • Peer Reviewed
• [Journal Article] Enhanced critical-current in P-doped BaFe2As2 thin films on metal substrates arising from poorly aligned grain boundaries (2016)
  • Author(s): H. Sato, H. Hiramatsu, T. Kamiya, and H. Hosono
  • Journal Title: Sci. Rep. Volume: 6 Issue: 1
  • DOI: 10.1038/srep36828
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Vortex pinning property of phosphorous-doped BaFe2As2 epitaxial films: Comparison between (La,Sr)(Al,Ta)O3 and MgO substrates (2015)
  • Author(s): H. Sato, H. Hiramatsu, T. Kamiya, and H. Hosono
  • Journal Title: IEEE Trans. Appl. Supercond. Volume: 25 Issue: 3 Pages: 1-5
  • DOI: 10.1109/tasc.2014.2368073
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Critical factor for epitaxial growth of cobalt-doped BaFe2As2 films by pulsed laser deposition (2014)
  • Author(s): H. Hiramatsu, H. Sato, T. Katase, T. Kamiya and H. Hosono
  • Journal Title: Applied Physics Letters Volume: 104 Issue: 17 Pages: 172602-172602
  • DOI: 10.1063/1.4874609
  • Peer Reviewed
• [Journal Article] High critical-current density with less anisotropy in BaFe2(As,P)2 epitaxial thin films: Effect of intentionally grown c-axis vortex-pinning centers (2014)
  • Author(s): H. Sato, H. Hiramatsu, T. Kamiya and H. Hosono
  • Journal Title: Applied Physics Letters Volume: 104 Issue: 18 Pages: 182603-182603
  • DOI: 10.1063/1.4875956
  • Peer Reviewed
• [Presentation] Ba1-xLaxFe2As2薄膜の結晶構造 (2017)
  • Author(s): 小林賢介, 中尾朗子, 真木祥千子, 山浦淳一, 片瀬貴義, 佐藤光, 佐賀山基, 熊井玲児, 村上洋一, 平松秀典, 細野秀雄
  • Organizer: 日本物理学会 第72回年次大会
  • Place of Presentation: 大阪
  • Year and Date: 2017-03-17
• [Presentation] 絶縁性FeSe薄膜における電界誘起超伝導に関するチャネル層の影響 (2017)
  • Author(s): 半沢幸太、平松秀典、神谷利夫、細野秀雄
  • Organizer: 第64回応用物理学会春季学術講演会
  • Place of Presentation: 神奈川
  • Year and Date: 2017-03-14
• [Presentation] 金属テープ基板上に作製した鉄系超伝導体BaFe2(As,P)2薄膜における臨界電流特性のP濃度依存性 (2017)
  • Author(s): 平松 秀典，佐藤 光，神谷 利夫，細野 秀雄
  • Organizer: 第55回セラミックス基礎科学討論会
  • Place of Presentation: 岡山
  • Year and Date: 2017-01-12
• [Presentation] 鉄系超伝導体FeSe薄膜中のエピタキシャル歪みと電子構造の関係 (2017)
  • Author(s): 山口祐太，半沢幸太，小畑由紀子，半那 拓，戸田喜丈，松石 聡，平松秀典，細野秀雄
  • Organizer: 第55回セラミックス基礎科学討論会
  • Place of Presentation: 岡山
  • Year and Date: 2017-01-12
• [Presentation] ZrCuSiAs型構造を有する鉄系超伝導体のヘテロエピタキシャル成長 (2017)
  • Author(s): 金城 弘幸，ハインドル シルビア，平松 秀典，細野 秀雄
  • Organizer: 第55回セラミックス基礎科学討論会
  • Place of Presentation: 岡山
  • Year and Date: 2017-01-12
• [Presentation] 異なるチャネル成長条件で作製した絶縁性FeSeを用いた電気二重層トランジスタ (2017)
  • Author(s): 半沢 幸太，平松 秀典，神谷 利夫，細野 秀雄
  • Organizer: 第55回セラミックス基礎科学討論会
  • Place of Presentation: 岡山
  • Year and Date: 2017-01-12
• [Presentation] Thin-film growth and electric double-layer transistors of iron-based superconductors (2016)
  • Author(s): H. Hiramatsu and H. Hosono
  • Organizer: 1st Asian International Cryogenic Materials Conference and Cryogenics and Superconductivity Society of Japan 50th Anniversary Conference
  • Place of Presentation: Kanazawa, Japan
  • Year and Date: 2016-11-07
  • Int'l Joint Research / Invited
• [Presentation] Electric filed-induced phase transition of insulating iron-selenides (2016)
  • Author(s): H. Hiramatsu and H. Hosono
  • Organizer: International Symposium on Revolutionary Atomic-Layer Materials
  • Place of Presentation: Sendai, Japan
  • Year and Date: 2016-10-21
  • Int'l Joint Research / Invited
• [Presentation] Superconductor transition from insulating FeSe thin films induced by electric double-layer transistor (2016)
  • Author(s): H. Hiramatsu, K. Hanzawa, H. Sato, T. Kamiya, and H. Hosono
  • Organizer: Applied Superconductivity Conference 2016 (ASC2016)
  • Place of Presentation: Denver, Colorado, USA
  • Year and Date: 2016-09-04
  • Int'l Joint Research
• [Presentation] Relationship Between Surface Degradation and Electric Field-Induced Superconductivity for Insulator-Like FeSe Epitaxial Films (2016)
  • Author(s): Kota Hanzawa, Hikaru Sato, Hidenori Hiramatsu, Toshio Kamiya, and Hideo Hosono
  • Organizer: The 5th International Symposium on Advanced Microscopy and Theoretical Calculations (AMTC5)
  • Place of Presentation: Nagoya, Japan
  • Year and Date: 2016-05-11
  • Int'l Joint Research
• [Presentation] Vortex Pinning Properties of Slightly Over-Doped BaFe2As2:P Epitaxial Films (2016)
  • Author(s): Hiroyuki Kinjo, Hikaru Sato, Hidenori Hiramatsu, Toshio Kamiya, and Hideo Hosono
  • Organizer: The 5th International Symposium on Advanced Microscopy and Theoretical Calculations (AMTC5)
  • Place of Presentation: Nagoya, Japan
  • Year and Date: 2016-05-11
  • Int'l Joint Research
• [Presentation] Difference in Electronic Structures of Superconducting and Insulator-Like FeSe Epitaxial Films (2016)
  • Author(s): Yuta Yamaguchi, Kota Hanzawa, Taku Hanna, Yoshitake Toda, Satoru Matsuishi, Hidenori Hiramatsu, and Hideo Hosono
  • Organizer: The 5th International Symposium on Advanced Microscopy and Theoretical Calculations (AMTC5)
  • Place of Presentation: Nagoya, Japan
  • Year and Date: 2016-05-11
• [Presentation] 金属IBADテープ基板上に作製した鉄系超伝導体BaFe2(As,P)2薄膜の臨界電流特性 (2016)
  • Author(s): 平松 秀典，佐藤 光，神谷 利夫，細野 秀雄
  • Organizer: 第54回セラミックス基礎科学討論会
  • Place of Presentation: アバンセ，グランデはがくれ（佐賀市）
  • Year and Date: 2016-01-07
• [Presentation] Electric Double-Layer Transistors Using Iron-Based Layered Compounds (2016)
  • Author(s): H. Hiramatsu and H. Hosono
  • Organizer: EMN Prague Meeting 2016: Iron and Iridium based Superconductivity
  • Place of Presentation: Prague, Czech Republic
  • Int'l Joint Research / Invited
• [Presentation] Molecular beam epitaxy growth of insulator-like FeSe thin films for direct induction of insulator-superconductor transition by electric field (2016)
  • Author(s): Kota Hanzawa, Hikaru Sato, Hidenori Hiramatsu, Toshio Kamiya, and Hideo Hoson
  • Organizer: Applied Superconductivity Conference 2016 (ASC2016)
  • Place of Presentation: Denver, Colorado, USA
  • Int'l Joint Research
• [Presentation] Heteroepitaxial growth of layered pnictides and chalcogenides films (2015)
  • Author(s): H. Hiramatsu and H. Hosono
  • Organizer: Collaborative Conference on Crystal Growth 2015: Epitaxial Thin Films and Nanostructures
  • Place of Presentation: Eaton Hotel, Kowloon, Hong Kong
  • Year and Date: 2015-12-14
  • Int'l Joint Research / Invited
• [Presentation] Ba(Fe1-xCox)2As2エピタキシャル薄膜における特異な圧力効果と電子輸送特性 (2015)
  • Author(s): 平松 秀典, 佐藤 光, 神谷 利夫, 細野 秀雄
  • Organizer: 第157回日本金属学会 秋期講演大会
  • Place of Presentation: 九州大学 伊都キャンパス, 福岡
  • Year and Date: 2015-09-15
• [Presentation] PLD法によるIBAD-MgO 基板上へのP添加BaFe2As2薄膜成長 (2015)
  • Author(s): 佐藤 光, 平松 秀典, 神谷 利夫, 細野 秀雄
  • Organizer: 第76回応用物理学会秋季学術講演会
  • Place of Presentation: 名古屋国際会議場
  • Year and Date: 2015-09-13
• [Presentation] Progress in Thin Films and Devices of Iron-based Layered Materials (2015)
  • Author(s): H. Hiramatsu, H. Sato, T. Katase, T. Kamiya, and H. Hosono
  • Organizer: Energy Materials and Nanotechnology Qingdao Meeting 2015: Iron and Iridium based Superconductivity
  • Place of Presentation: Qingdao, China
  • Year and Date: 2015-06-14
  • Int'l Joint Research / Invited
• [Presentation] Thin Films and Devices of Iron-based Layered Compounds (2015)
  • Author(s): H. Hiramatsu, H. Sato, T. Katase, T. Kamiya, and H. Hosono
  • Organizer: 4th Annual World Congress of Advanced Materials 2015
  • Place of Presentation: Chongqing, China
  • Year and Date: 2015-05-27
  • Int'l Joint Research / Invited
• [Presentation] Thin Film Growth and Device Fabrication of Iron-Based Layered Materials: High-Performance Superconducting Films and Electric Double-Layer Transistors (2014)
  • Author(s): H. Hiramatsu, H. Sato, T. Katase, T. Kamiya, and H. Hosono
  • Organizer: The 27th International Symposium on Superconductivity 2014 (ISS 2014)
  • Place of Presentation: タワーホール船堀（東京都江戸川区）
  • Year and Date: 2014-11-25 – 2014-11-27
  • Invited
• [Presentation] PLD法による鉄系超伝導体BaFe2As2薄膜の膜質決定要因の解明と等方的な高臨界電流密度の実現 (2014)
  • Author(s): 平松 秀典，佐藤 光，片瀬 貴義，神谷 利夫，細野 秀雄
  • Organizer: 日本金属学会 2014年秋期(第155回)講演大会
  • Place of Presentation: 名古屋大学東山キャンパス (愛知県名古屋市)
  • Year and Date: 2014-09-24 – 2014-09-26
• [Presentation] Excitation laser dependence and control factor for crystallinity of cobalt-doped BaFe2As2 epitaxial films by pulsed laser deposition (2014)
  • Author(s): Hidenori Hiramatsu, Hikaru Sato, Takayoshi Katase, Toshio Kamiya, and Hideo Hosono
  • Organizer: Applied Superconductivity Conference 2014
  • Place of Presentation: Charlotte, North Carolina （USA）
  • Year and Date: 2014-08-10 – 2014-08-15
• [Presentation] Strong vortex pinning and isotropic critical current density in BaFe2(As,P)2 epitaxial films grown by pulsed laser deposition (2014)
  • Author(s): Hikaru Sato, Hidenori Hiramatsu, , Takayoshi Katase, Toshio Kamiya, and Hideo Hosono
  • Organizer: Applied Superconductivity Conference 2014
  • Place of Presentation: Charlotte, North Carolina （USA）
  • Year and Date: 2014-08-10 – 2014-08-15
• [Presentation] Progress in Epitaxial Thin Films of 122-type Iron-pnictide Superconductors: Non-equilibrium Impurity Doping and Critical Current Density (2014)
  • Author(s): H. Hiramatsu and H. Hosono
  • Organizer: 13th International Conference on Modern Materials and Technologies (CIMTEC2014): the 6th Forum on New Materials
  • Place of Presentation: Tuscany (Italy)
  • Year and Date: 2014-06-15 – 2014-06-19
  • Invited
• [Presentation] Superconductivity of indirectly electron-doped and isovalent-doped 122-type epitaxial films (2014)
  • Author(s): H. Hiramatsu, H. Sato, T. Katase, T. Kamiya, and H. Hosono
  • Organizer: Energy Materials Nanotechnology Summer Meeting 2014 (EMN 2014): Iron and Iridium based Superconductivity
  • Place of Presentation: Cancun (Mexico)
  • Year and Date: 2014-06-09 – 2014-06-12
  • Invited
• [Presentation] PLD法によるCo添加BaFe2As2エピタキシャル薄膜成長と励起レーザー波長との関係 (2014)
  • Author(s): 平松秀典
  • Organizer: 第61回応用物理学会春季学術講演会
  • Place of Presentation: 青山学院大学相模原キャンパス