Fabrication of hybrid thin film structures from HTS and CMR materials

19th International Summer School on Vacuum, Electron and Ion Technologies

Sojková, M.^1 ; Štrbík, V.^1 ; Nurgaliev, T.^2 ; Chromik, Š.^1 ; Dobroka, E.^1 ; Španková, M.^1 ; Blagoev, B.^3 ; Gál, N.^1

Institute of Electrical Engineering, Slovak Academy of Sciences, 9 Dúbravská cesta, Bratislava

841 04, Slovakia^1

Emil Djakov Institute of Electronics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee, Sofia

1784, Bulgaria^2

Georgi Nadjakov Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee, Sofia

1784, Bulgaria^3

关键词: Half-metallic;    High temperature superconductor (HTS);    HTS materials;    Hybrid thin film;    Low-frequency;    Microwave characteristics;    Spin polarized currents;    Working temperatures;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/700/1/012022/pdf
DOI  :  10.1088/1742-6596/700/1/012022

来源: IOP

【 摘 要 】

We present the preparation of bilayers from high-temperature superconductors (HTS) and half-metallic ferromagnetic (FM) manganite with a colossal magnetoresistance (CMR). We used YBa2Cu3O7-x(YBCO) and Tl2Ba2CaCu2O8(TBCCO) thin films as a HTS material and La0.67Sr0.33MnO3(LSMO) film as a CMR material. In the case of YBCO/LSMO, we prepared FM/HTS heterostructure for studying the spin-polarized current injection effect on the electrical properties of the YBCO strip in dc or low-frequency regimes and on the microwave characteristics of the strip. For the first time, we report the preparation of a TBCCO/LSMO bilayer. In some applications, the TBCCO offers better parameters (higher working temperature, lower surface resistance, lower 1/f noise) than YBCO.