Single crystal growth of iron oxypnictides and physical properties under high pressure

2013 Fiscal Year Final Research Report

• Project/Area Number: 23684024
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics II
• Research Institution: Niigata University
• Principal Investigator: ISHIKAWA Fumihiro 新潟大学, 自然科学系, 准教授 (50377181)
• Project Period (FY): 2011-04-01 – 2014-03-31
• Keywords: 高温超伝導 / 高圧 / 鉄系超伝導体

Research Abstract

New iron oxypnictide Sr2Cr2Fe2As2O2 successfully prepared. Higher superconducting transition temperature is expected in iron oxypnictides with the layered structures between Fe-As tetrahedrons, like Sr2Cr2Fe2As2O2. However, neither elemental substitution for doping careers nor applying pressure of 13 GPa, does cause the superconductivity in Sr2Cr2Fe2As2O2. Suppression of the superconductivity in Sr2Cr2Fe2As2O2 system is probably due to magnetic order of Cr atom. We tried to prepare single crystal samples of Sr2Cr2Fe2As2O2 with metal crucibles with tungsten metal. However, purity of gas in the electrical furnace was not enough to prevent the metal crucibles from melting. As a result, we could not grow the single crystal sample of Sr2Cr2Fe2As2O2. Sr2Cr2Fe2As2O2 and some kinds of elemental substituted compounds are very weak, so that synthesizing under high pressure is suitable for this material. Measurement system for Hall conductivity under high pressure was established.

Research Products

• [Journal Article] Superconductivity in 122 antimonide SrPt_2Sb_2 (2013)
  • Author(s): M. Imai, S. Emura, M. Nishio, Y. Natsushita, S. Ibuka, N. Eguchi, F. Ishikawa, Yuh Yamada, T. Muranaka, J. Akimitsu
  • Journal Title: Supercond. Sci. Technol Volume: 26 Pages: 075001, 1-4
  • DOI: 10.1088/0953-2048/26/7/075001
  • Peer Reviewed
• [Journal Article] Synthesis of New Layered Oxypnictides Sr_2CrO_2(FeAs)_2 (2013)
  • Author(s): N. Eguchi, F. Ishikawa, M. Kodama, T. Wakabayashi, A. Nakayama, A. Ohmura, Yuh Yamada
  • Journal Title: J. Phys. Soc. Jpn Volume: 82 Pages: 045002, 1-2
  • DOI: 10.7566/JPSJ.82.045002
  • Peer Reviewed
• [Journal Article] Pressure-induced superconductivity in Bi_<0.85>Sb_<0.15> alloy (2012)
  • Author(s): A. Ohmura, A. Yamamura, M. Einaga, F. Ishikawa, A. Nakayama, Yuh Yamada and S. Nakano
  • Journal Title: J. Phys.: Conf. Ser Volume: 400 Pages: 022088, 1-4
  • DOI: 10.1088/1742-6596/400/2/022088
  • Peer Reviewed
• [Journal Article] Powder x-ray diffraction of BaFe_2As_2 under hydrostatic pressure (2012)
  • Author(s): N. Eguchi, M. Kodama, F. Ishikawa, A. Nakayama, A. Ohmura, Yuh Yamada and S. Nakano
  • Journal Title: J. Phys.: Conf. Ser Volume: 400 Pages: 022017, 1-4
  • DOI: 10.1088/1742-6596/400/2/022017
  • Peer Reviewed
• [Journal Article] Pressure effect on critical temperature for superconductivity and lattice parameters of AlB_2-type ternary silicide YbGa_<1.1>Si_<0.9> (2011)
  • Author(s): Ayako Ohmura, Koji Fujimaki, Fumihiro Ishikawa, Yuh Yamada, Naohito Tsujii, and Motoharu Imai
  • Journal Title: Phys. Rev. B Volume: 84 Pages: 104520, 1-7
  • DOI: 10.1103/PhysRevB.84.104520
  • Peer Reviewed
• [Journal Article] Pressure-induced phase transition of Bi_2Te_3 to a bcc structure (2011)
  • Author(s): Mari Einaga, Fumihiro Ishikawa, Ayako Ohmura, Atsuko Nakayama, Yuh Yamada, and Satoshi Nakano
  • Journal Title: Phys. Rev. B Volume: 83 Pages: 092102, 1-4
  • DOI: 10.1103/PhysRevB.83.092102
  • Peer Reviewed
• [Journal Article] Effect of Substitution of Ca_<2+> for Eu_<2+> on Pressure-Induced Superconductivity in EuFe_2As_2 (2011)
  • Author(s): Akihiro Mitsuda, Tomohiro Matoba, Satoshi Seike, Fumihiro Ishikawa, Yuh Yamada, and Hirofumi Wada
  • Journal Title: J. Phys. Soc. Jpn Volume: 80 Pages: SA117
  • DOI: 10.1143/JPSJS.80SA.SA117
  • Peer Reviewed
• [Journal Article] Competition between Fe-based superconductivity and antiferromagnetism of Eu^<2+> in Eu_<1-x>Ca_xFe_2As_2 (2011)
  • Author(s): A. Mitsuda, S. Seike, T. Matoba, H. Wada, F. Ishikawa and Y. Yamada
  • Journal Title: J. Phys.: Conf. Ser Volume: 273 Pages: 012100
  • DOI: 10.1088/1742-6596/273/1/012100
  • Peer Reviewed
• [Presentation] 鉄オキシニクタイドSr_2CrFe_2As_2O_2 の導電性に対する置換効果 (2014)
  • Author(s): 若林雄,江口直也,三宮圭一,平田建志郎,山岸達矢,石川文洋,山田裕,中山敦子,大村彩子
  • Organizer: 日本物理学会第69回年次会
  • Place of Presentation: 東海大学湘南キャンパス
  • Year and Date: 2014-03-27
• [Presentation] 21222型構造を持つ鉄オキシニクタイドの高圧下物性 (2013)
  • Author(s): 江口 直也・若林 雄・山岸達 矢・石川 文洋・大村 彩子・中山 敦子・山田 裕
  • Organizer: 第54回高圧討論会
  • Place of Presentation: 朱鷺メッセ新潟コンベンションセンター
  • Year and Date: 2013-11-14
• [Presentation] 122系Sb化合物における新超伝導物質探索 (2013)
  • Author(s): 今井基晴,井深壮史,菊川直樹,西尾満章,宇治進也,寺嶋太一,江口直也,石川文洋,山田裕,矢島健,陰山洋
  • Organizer: 日本物理学会2013年秋季大会
  • Place of Presentation: 徳島大学
  • Year and Date: 2013-09-28
• [Presentation] 新しい鉄オキシニクタイドSr_2CrFe_2As_2O_2の合成と高圧下物性 (2013)
  • Author(s): 江口直也,若林雄,石川文洋,大村彩子,中山敦子,山田裕
  • Organizer: 日本物理学会第68回年次会
  • Place of Presentation: 広島大学 東広島キャンパス
  • Year and Date: 2013-03-27
• [Presentation] 21222型構造をもつ新しい鉄系オキシニクタイドの合成 (2013)
  • Author(s): 石川文洋,江口直也,若林雄,平田建志郎,菊池雅彦,三宮圭一,児玉通大,大村彩子,中山敦子,山田裕
  • Organizer: 日本物理学会第68回年次会
  • Place of Presentation: 広島大学 東広島キャンパス
  • Year and Date: 2013-03-27
• [Presentation] 高圧下におけるEuMn_2As_2 の電気伝導特性 (2012)
  • Author(s): 江口直也・石川文洋・光田暁弘・ 和田裕文・榮永茉利・大村彩子・中山敦子・山田裕
  • Organizer: 第53回高圧討論会
  • Place of Presentation: 大阪大学豊中キャンパス大阪大学会館
  • Year and Date: 2012-11-07
• [Presentation] 積層構造のブロック層を有する鉄オキシニクタイドの合成と物性 (2012)
  • Author(s): 江口直也,若林雄,石川文洋,大村彩子,中山敦子,山田裕
  • Organizer: 日本物理学会2012年秋季大会
  • Place of Presentation: 横浜国立大学
  • Year and Date: 2012-09-20
• [Presentation] 鉄オキシニクタイドSr_4Cr_2Fe_2As_2O_6の合成と物性 (2012)
  • Author(s): 石川文洋,児玉通大,渡部琢也,江口直也,中山敦子,大村彩子,山田裕
  • Organizer: 日本物理学会第67回年次会
  • Place of Presentation: 関西学院大学 西宮上ケ原キャンパス
  • Year and Date: 2012-03-25
• [Presentation] オキシニクタイドの高圧下における物性 (2011)
  • Author(s): 石川文洋・児玉通大・渡部琢也・江口直也・大村彩子・中山敦子・山田裕
  • Organizer: 第52回高圧討論会
  • Place of Presentation: 沖縄キリスト教学院
  • Year and Date: 2011-11-10
• [Presentation] Powder x-ray diffraction of BaFe_2As_2 under hydrostatic pressure (2011)
  • Author(s): N. Eguchi, M. Kodama,F. Ishikawa, A. Nakayama, A. Ohmura, Yuh Yamada and S. Nakano
  • Organizer: The 26th International Conference on Low Temperature Physics
  • Place of Presentation: Beijing International Convention Center, Beijing, China
  • Year and Date: 2011-08-15
• [Remarks] ホームページ等
  • URL: http://bussei.gs.niigata-u.ac.jp/~yamada/