Fabrication of All-Oxide Ferroelectric/High-Temperature Superconductor/Ferromagnetic Heterostructures for Electorically and Magnetically Tunable Microwava Devices

用于电磁可调微波器件的全氧化物铁电/高温超导/铁磁异质结构的制造

• 批准号: 12650685
• 负责人: HONTSU Shigeki
• 金额: $ 1.09万
• 依托单位: Kinki University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650685/
• 关键词: superconducting filter; tunable device; perovskite oxide; mobile communication; surface resistance

This report mainly concerns with tunable microwave filter for mobile telecommunications. In order to realize large tuning and lowinsertion loss, we propose an electrically and magnetically tunable superconducting microwave filters with all-oxide superconductor/ferroelectric/ferromagnetic heterostructures.We have fabricated YBa2Cu3O7y (YBCO), Ba0.05Sr0.95TiO3 (BSTO) and Pr0.85Ca0.15MnO3(PCMO) singlecrystal films and half-wavelength coplanar wave guide (CPW) resonator consisting of YBCO/BSTO/PCMO heterostructures. We have also investigated electric properties of the BSTO film and magnetic-electric properties of the PCMP film. Moreover, we have observed change of the resonant frequency of the tunable CPW resonator with the resonant frequency around 7 GHz under application of both electric and magnetic fields. The results show that the shift of the resonant frequency is about 7.5 MHz (tunability : about 0.1%) by an application of an electric field. On the other handk, the shift is about 20 MHz (tunability ; about 0.25%) by an application of a magnetic field. These values are available for use in the adjustable application. However, these values have a disadvantage for the filter of software-defined radio. Also, the keeping effect of the characteristic impedance under both applied electric and magnetic fields could not be observed because of its small tunability. Thus, we have proposed a mechanically tunable superconducting microwave filter based on this research technique. As a result, we have obtained the large tunability of 20%.

本报告主要是关于移动的通信用可调谐微波滤波器。为了实现大调谐和低插入损耗，我们提出了一种全氧化物超导体/铁电/铁磁异质结构的电磁可调谐超导微波滤波器，制备了YBa_2Cu_3O_7_y（YBCO），Ba_（0.05）Sr_（0.95）TiO_3（BSTO）和Pr_（0.85）Ca_（0.15）MnO_3（PCMO）单晶薄膜及YBCO/BSTO/PCMO异质结构半波长共面波导谐振腔。我们还研究了BSTO薄膜的电学性能和PCMP薄膜的磁电性能。此外，我们已经观察到的可调谐共面波导谐振器的谐振频率的变化与周围的7 GHz的谐振频率下的应用程序的电场和磁场。结果表明，通过施加电场，谐振频率的偏移约为7.5 MHz（可调谐性：约0.1%）。另一方面，通过施加磁场，偏移约为20 MHz（可调谐性;约0.25%）。这些值可用于可调应用。然而，这些值对于软件定义无线电的滤波器具有缺点。此外，由于其小的可调谐性，不能观察到在外加电场和磁场下的特性阻抗的保持效果。因此，我们提出了一个机械可调超导微波滤波器的基础上，这项研究技术。结果，我们获得了20%的大的可调性。

项目成果

S.Hontsu, H.Nishikawa: "Fabrication and Investigation of HTS/Ferroelectric/Ferromagnetic Structures for Electrically and Magnetically Tunable Superconducting Microwave Devices"Memoirs of the School of Biology-oriented Science and Technology of KINKI UNIVE

S.Hontsu、H.Nishikawa：《电磁可调谐超导微波器件的高温超导/铁电/铁磁结构的制造和研究》近畿大学生物科学技术学院回忆录

Shigeki Hontsu and Hiroaki Nishikawa: "Fabrication and Investigation of HTS/Ferroelectric/Ferromagnetic Structure for Electrically and Magnetically Tunable Superconducting Mircowave Devices."Momoirs of the School of Biology-oriented Science and Technolo o

Shigeki Hontsu 和 Hiroaki Nishikawa：“电磁可调谐超导微波器件的 HTS/铁电/铁磁结构的制造和研究。”生物导向科学技术学院回忆录

S.Mine, M.Terakago, T.Sakatani, S.Hontsu, H.Niahikawa, and et al.: "Characteristics of mechanically tunable superconductive resonators"Superconductor Science and Technology. Vol.15. (2002)

S.Mine、M.Terakago、T.Sakatani、S.Hontsu、H.Niahikawa 等：“机械可调谐超导谐振器的特性”超导科学与技术。

N.Nishikawa, S.Hontsu, et al.: "Preparation of directly stacked YBa_2Cu_3O_<7-5>/Oxide magnetic material thin films on Al_2O_3(0001)substrate"Supercondector Science and Technology. Vol.15.1. 170-173 (2002)

N.Nishikawa、S.Hontsu等：“Al_2O_3(0001)衬底上直接堆叠YBa_2Cu_3O_<7-5>/氧化物磁性材料薄膜的制备”，超导科学与技术。

S.Hontsu, T.Sakatani, A.Fujimaki, H.Nishikawa, et al.: "Mechanically Tunable High-Temperature Superconducting Microwave Filter with Large Shift of Resonant Frequency"Jpn.Journal of Applied Physics. Vol.40.11A. 1148-1150 (2001)

S.Hontsu、T.Sakatani、A.Fujimaki、H.Nishikawa 等人：“谐振频率大位移的机械可调谐高温超导微波滤波器”Jpn.应用物理学杂志。