Harmonic generation by current modulation of the microwave transmission through granular high-Tc superconducting films

M. Golosovsky; Y. Naveh; D. Davidov; H. Raffy; M. Schieber; S. Chocron

doi:10.1016/0921-4534(91)90041-V

Harmonic generation by current modulation of the microwave transmission through granular high-T_c superconducting films

M. Golosovsky^*
, Y. Naveh
, D. Davidov
, H. Raffy
, M. Schieber
, S. Chocron

^*Corresponding author for this work

Racah Institute of Physics

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

We report on microwave transmission through thin superconducting films of Y-Ba-Cu-O and Bi-Sr-Ca-Cu-O in the presence of a low-frequency bias current I₀ = IDC + IAC cos 2 τft in the plane of the film. We found that the alternating current can modulate the microwave transmission with the generation of many even harmonics (2f, 4f, 6f...) for I_AC larger or equal to the critical current, I_c, and for samples which contain a significant amount of weak links. Additional odd harmonics are observed upon applying a DC current I_DC. The presence of weak links was determined from the variation of the I-V curves upon microwave irradiation. The harmonic generation is attributed to the nonlinear response of the microwave complex resistivity of the Josephson medium to the bias current. A model based on a single Josephson junction can account qualitatively for the experimental data.

Original language	English
Pages (from-to)	379-386
Number of pages	8
Journal	Physica C: Superconductivity and its Applications
Volume	176
Issue number	4-6
DOIs	https://doi.org/10.1016/0921-4534(91)90041-V
State	Published - 1 Jun 1991

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title = "Harmonic generation by current modulation of the microwave transmission through granular high-Tc superconducting films",

abstract = "We report on microwave transmission through thin superconducting films of Y-Ba-Cu-O and Bi-Sr-Ca-Cu-O in the presence of a low-frequency bias current I0 = IDC + IAC cos 2 τft in the plane of the film. We found that the alternating current can modulate the microwave transmission with the generation of many even harmonics (2f, 4f, 6f...) for IAC larger or equal to the critical current, Ic, and for samples which contain a significant amount of weak links. Additional odd harmonics are observed upon applying a DC current IDC. The presence of weak links was determined from the variation of the I-V curves upon microwave irradiation. The harmonic generation is attributed to the nonlinear response of the microwave complex resistivity of the Josephson medium to the bias current. A model based on a single Josephson junction can account qualitatively for the experimental data.",

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AU - Golosovsky, M.

AU - Naveh, Y.

AU - Davidov, D.

AU - Raffy, H.

AU - Schieber, M.

AU - Chocron, S.

PY - 1991/6/1

Y1 - 1991/6/1

N2 - We report on microwave transmission through thin superconducting films of Y-Ba-Cu-O and Bi-Sr-Ca-Cu-O in the presence of a low-frequency bias current I0 = IDC + IAC cos 2 τft in the plane of the film. We found that the alternating current can modulate the microwave transmission with the generation of many even harmonics (2f, 4f, 6f...) for IAC larger or equal to the critical current, Ic, and for samples which contain a significant amount of weak links. Additional odd harmonics are observed upon applying a DC current IDC. The presence of weak links was determined from the variation of the I-V curves upon microwave irradiation. The harmonic generation is attributed to the nonlinear response of the microwave complex resistivity of the Josephson medium to the bias current. A model based on a single Josephson junction can account qualitatively for the experimental data.

AB - We report on microwave transmission through thin superconducting films of Y-Ba-Cu-O and Bi-Sr-Ca-Cu-O in the presence of a low-frequency bias current I0 = IDC + IAC cos 2 τft in the plane of the film. We found that the alternating current can modulate the microwave transmission with the generation of many even harmonics (2f, 4f, 6f...) for IAC larger or equal to the critical current, Ic, and for samples which contain a significant amount of weak links. Additional odd harmonics are observed upon applying a DC current IDC. The presence of weak links was determined from the variation of the I-V curves upon microwave irradiation. The harmonic generation is attributed to the nonlinear response of the microwave complex resistivity of the Josephson medium to the bias current. A model based on a single Josephson junction can account qualitatively for the experimental data.

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Harmonic generation by current modulation of the microwave transmission through granular high-T_c superconducting films

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