Preparation of the superconducting magnetostatic wave device by the heterostructure of the oxide superconductor/ferromagnet.

氧化物超导/铁磁体异质结构制备超导静磁波器件

• 批准号: 14550017
• 负责人: HONTSU Shigeki
• 金额: $ 1.47万
• 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: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14550017/
• 关键词: superconducting electronics; superconducting microwave device; magnetostatic wave; superconducting vortices; 超伝導; ヘテロ構造; 酸化物超伝導体; 強磁性体; YIG

On the electronic application of the superconductor, SQUID or SFQ circuit have utilized the feature of the flux quantumization, up-to-maximum. However, only the low surface resistance is noted for the field of superconducting microwave device. Thus, we have noted the application of the flux quantum to the microwave devices. In this idea, we have investigated and fabricated the prototype device of the superconducting magnetostatic wave device, in which the superconducting vortices and the magnetostatic wave propagating in the ferromagnetic matter. The effects of the interaction between the vortices and the magnetostatic wave are following two points. One is the magnetic energy of the magnetostatic wave will be absorbed by the vortices. The other is the switch of the superconductor to the normal state because of the vortices motion driven by the magnetostatic wave. In order to verify the consideration, we have performed two experiments, i.e., the measurement of the magnetostatic wave pro … More pagation for the situation of vortices in the superconductor, and the I-V measurement of the superconductor for the situation of the magnetostatic wave propagation.In those measurement, we have monitored the switching behavior of the superconducting state and normal state by the propagation of the magnetostatic wave. Furthermore, the magnetostatic wave is certainly absorbed when the superconductor is the normal state. This is the first step of the novel superconducting microwave device which is the switching device controlled by the interaction between vortices and the magnetostatic wave device.The superconducting magnetostatic wave device is suitable by the fabrication as the bilayered epitaxial thin films of the superconductor and the ferromagnet. In the present stage, Y-Fe garnet(YIG) ferrite is widely used as the magnetostatic wave propagator. However, the YIG cannot be grown on the perovskite type superconductor. Thus, our motivation is toward to the search of the new magnetic material for the waveguide of the magnetostatic wave which can construct the heteroepitaxial bilayer with the superconductor. The material we have noted is perovskite type manganite Pr_<0.85>Ca_<0.15>MnO_3 (PCMO).As the first step, we have prepared the PCMO thin film. The X-ray diffraction shows the high quality epitaxial thin films on the Nb-SrTiO_3(100). In the next, the electric properties are evaluated with the temperaturerange of 25 K〜300K. As the results, the LN_2 temperature of 77K, the PCMO has suitable Δ_r and low loss tangent. This means the PCMO is useful for the microwave application. Furthermore, the PCMO/YBCO heterostructure is formed as the band elimination filter of the superconducting magnetostatic wave device. In this experiment, microwave in the superconducting straight line can excited the magnetostatic wave in the PCMO thin films. Less

在超导体的电子应用中，SQUID或SFQ电路已经充分利用了通量量子化的特性，但在超导微波器件领域仅注意到低表面电阻。在此思路下，我们研究并制作了超导静磁波器件的原型器件，其中包含超导涡旋和静磁波。涡旋与静磁波相互作用的影响有两点：一是静磁波的磁能被涡旋吸收。由于静磁波驱动的涡流运动，我们进行了两个实验，即静磁波 pro 的测量。超导体中涡流情况的寻呼，以及静磁波传播情况的超导体I-V测量。在这些测量中，我们通过静磁波的传播监测了超导态和常态的切换行为此外，当超导体处于正常状态时，静磁波肯定会被吸收，这是新型超导微波器件的第一步，该器件是由超导体控制的开关器件。超导静磁波器件适合采用超导体和铁磁体的双层外延薄膜制作。现阶段广泛采用Y-Fe石榴石(YIG)铁氧体作为超导静磁波器件。然而，YIG 不能在钙钛矿型超导体上生长，因此，我们的动机是寻找新的磁性。可以与超导体构建异质外延双层的静磁波波导材料，我们注意到的材料是钙钛矿型锰酸盐Pr_<0.85>Ca_<0.15>MnO_3（PCMO）。作为第一步，我们制备了PCMO。 X射线衍射显示Nb-SrTiO_3(100)上形成了高质量的外延薄膜。接下来，在 25 K 至 300 K 的温度范围内评估了 PCMO 的电性能，结果表明，LN_2 温度为 77 K，PCMO 具有合适的 Δ_r 和低损耗角正切。此外，形成PCMO/YBCO异质结构作为超导静磁波器件的带阻滤波器。本实验中，超导直线中的微波可以激发超导静磁波。 PCMO薄膜较少。

项目成果

H.Nishikawa, S.Hontsu, T.Sakatani, M.Nakamori., M.Terakago, S.Mine, H.Tabata, T.Kawai: "Preparation of directly stacked YBa_2Cu3O_<7-δ>/oxide magnetic material thin films on Al_2O_3(0001) substrate"Superconductor Science and Technology. Vol.15. 170-173 (2

H.Nishikawa、S.Hontsu、T.Sakatani、M.Nakamori.、M.Terakago、S.Mine、H.Tabata、T.Kawai：“直接堆叠 YBa_2Cu3O_<7-δ>/氧化物磁性材料薄膜的制备Al_2O_3(0001)基体的研究《超导科学与技术. Vol.15. 170-173 (2

S.Hontsu, S.Mine, H.Nishikawa, M.Nakamori, A.Fujimaki, M.Inoue, A.Maeda, T.Kawai: "Study of Mechanically Tunable Superconducting Microwave Filter Using Lumped Elements"IEEE Transaction on Applied Superconductivity. Vol.13. 720-723 (2003)

S.Hontsu、S.Mine、H.Nishikawa、M.Nakamori、A.Fujimaki、M.Inoue、A.Maeda、T.Kawai：“使用集总元件的机械可调谐超导微波滤波器的研究”IEEE 应用超导学报。

西川博昭: "Preparation of directly stacked YBa_2Cu_3O_<7-δ>/Oxide magnetic material thin films on Al_2O_3(0001) substrate"Superconductor Science and Technology. Vol.15. 170-173 (2002)

Hiroaki Nishikawa：“Al_2O_3(0001)衬底上直接堆叠的YBa_2Cu_3O_<7-δ>/氧化物磁性材料薄膜的制备”超导科学与技术Vol.170-173。

Shigeki Hontsu: "Study of mechanically tunable superconducting microwave filter using lumped elements"IEEE Transaction on Applied Superconductivity. Vol.13・No.2. 720-723 (2003)

Shigeki Hontsu：“使用集总元件的机械可调谐超导微波滤波器的研究”IEEE Transaction on Applied Superconductivity Vol.13·No.2（2003）。

H.Nishikawa, S.Hontsu, M.Nakamori, H.Tabata, T.Kawai: "Preparation of Perovskite Type Manganite on Al_2O_3 Substrate as an Excellent Buffer Layer for YBa_2Cu3O_<7-δ> Growth"IEEE Transaction on Applied Superconductivity. Vol.13. 2725-2728 (2003)

H.Nishikawa、S.Hontsu、M.Nakamori、H.Tabata、T.Kawai：“在 Al_2O_3 基底上制备钙钛矿型锰酸盐作为 YBa_2Cu3O_<7-δ> 生长的优异缓冲层”IEEE 应用超导学报卷。 .13。2725-2728（2003）