Search for the New Superconductor in Vanadium Oxide Ceramics

寻找氧化钒陶瓷中的新型超导体

• 批准号: 63460026
• 负责人: NAGASAWA Hiroshi
• 金额: $ 2.94万
• 依托单位: Institute of Physics, University of Tsukuba
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1988
• 资助国家: 日本
• 起止时间: 1988 至 1989
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-63460026/
• 关键词: Vanadium Oxide Conductor; Magnetic Resonance; Cavity perturbation method; Bipolaron; Excitonic Superconductor; two dimensional triangular lattice; Oxide having spinel structure; Metal-Insulator Transition; 空胴振動法; バイポ-ラロ-ン; (マイクロ波)空胴摂動法; 酸化物セラミッ

l.New Device of Detection of Phase Transition Phenomena by Microwave.The high sensitive cavity perturbation method with the use of 9 GHz microwave was devised. By using this method, the lower critical field Hc_1 of superconductor Bi-Sr-Ca-Cu-O system was found to be larger than the reported value when magnetic is applied within 2 dimensional plane.2. Search for the New Superconductivity in Vanadium Oxide Ceramics.(i) Quasi-one-Dimensional SystemCu_<2+x>V_4O_<11> System: as a candidate for the Excitonic Superconductivity Pb_xV_2O_5, Tl_<0.5>V_2O_5 system: trial for Bose condensation of Bipolarons.(II) 2 Dimensional system s -systemSrV_3O_7 system: depsilon conductor Cu_5V_2O_<10-delta> system: dgamma conductor LiMO_2 system: 2 dimensional triangular lattice system(III) 3 Dimensional systemspinel structure: Li_xZn_<1-x>V_2O_4, Li_<1+x>Ti_<2-x>O_4 new golden bronze: CuVO_3

一种新的微波相变现象检测装置。设计了利用9ghz微波的高灵敏度腔微扰法。利用该方法，发现在二维平面内施加磁场时，超导体Bi-Sr-Ca-Cu-O体系的下临界场Hc_1大于所报道的值。寻找氧化钒陶瓷的新型超导性。(i)准一维系统cu_ <2+x>V_4O_<11>体系：作为激子超导Pb_xV_2O_5， Tl_<0.5>V_2O_5体系的候选体系：双极化子的玻色凝聚试验。（II）二维体系s -systemSrV_3O_7体系：depsilon导体Cu_5V_2O_<10- δ >体系：dgamma导体LiMO_2体系：二维三角晶格体系（III）三维体系尖晶石结构：Li_xZn_<1-x>V_2O_4, Li_<1+x>Ti_<2-x>O_4新型金青铜：CuVO_3

项目成果

Y.Saito,H.Nagasawa: "Charge Transfer Phase Trausition in Quasi-One-Dimensional Conductor Cu_<2+x>V_4O_<11> System" 投稿準備中.

Y.Saito、H.Nagasawa：“准一维导体 Cu_<2+x>V_4O_<11> 系统中的电荷转移相转移”，准备提交。

Y.Amako,H.Nagasawa,M.Onoda,T.Evata: "NMR Studies for spinel Phase Li_xZ_<n1-x>V_2O_4System" J.Phys.Soc.Japan. 58. (1990)

Y.Amako、H.Nagasawa、M.Onoda、T.Evata：“尖晶石相 Li_xZ_<n1-x>V_2O_4System 的 NMR 研究”J.Phys.Soc.Japan。

Y.Saito,H.Nagasawa: "Charge Transfer Phase Transition in Quasi-One-Dimensional Conductor Cu_<2+x>V_4O_<11> System."

Y.Saito，H.Nagasawa：“准一维导体 Cu_<2 x>V_4O_<11> 系统中的电荷转移相变。”

斉藤隆夫、高田慧: J.Phys.Soc.Japan. 58. 783-786 (1988)

Takao Saito，Kei Takada：J.Phys.Soc.Japan 58. 783-786 (1988)。

T. Naka and H. Nagasawa: "Magnetic Resonance Studies on LiMO_2 (M=V, Cr, Co, Ni)"

T. Naka 和 H. Nagasawa：“LiMO_2 (M=V、Cr、Co、Ni) 的磁共振研究”