Bridge type josephson junctions in mo-cvd thin films

Satoru Noge; Tsutomu Yamashita; Zhen Wang; Toshiaki Matsui; Hideyuki Kurosawa; Hisanori Yamane; Toshio Hirai

doi:10.1143/JJAP.28.L1581

Bridge type josephson junctions in mo-cvd thin films

Satoru Noge, Tsutomu Yamashita, Zhen Wang, Toshiaki Matsui, Hideyuki Kurosawa, Hisanori Yamane, Toshio Hirai

IMRAM - Division of Inorganic Material Research

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

20 Citations (Scopus)

Abstract

Using Y₁Ba₂Cu₃O_7-xthin films, bridge type Josephson junctions are fabricated. Thin films of Y₁Ba₂Cu₃O_7-xon (100) MgO substrates are deposited by the MO-CVD method. These films exhibit zero resistance at 86 K, and a critical current density of 10⁴to 10⁵A/cm²at 77 K. The effect of radio frequency irradiations to the bridge are investigated. Sharp microwave-induced steps are observed up to 800 μV at 77 K for X band irradiation. Clear Shapiro steps are also observed at the millimeter (101 GHz) and submillimeter frequency (303 GHz). The results demonstrate that the thin film bridges made by MO-CVD show an ideal ac Josephson effect.

Original language	English
Pages (from-to)	L1581-L1584
Journal	Japanese Journal of Applied Physics
Volume	28
Issue number	9 A
DOIs	https://doi.org/10.1143/JJAP.28.L1581
Publication status	Published - 1989 Sept 1

Keywords

Bridge junction
MO-CVD
YBCO thin film
YBCO thin film

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10.1143/JJAP.28.L1581

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title = "Bridge type josephson junctions in mo-cvd thin films",

abstract = "Using Y1Ba2Cu3O7-xthin films, bridge type Josephson junctions are fabricated. Thin films of Y1Ba2Cu3O7-xon (100) MgO substrates are deposited by the MO-CVD method. These films exhibit zero resistance at 86 K, and a critical current density of 104to 105A/cm2at 77 K. The effect of radio frequency irradiations to the bridge are investigated. Sharp microwave-induced steps are observed up to 800 μV at 77 K for X band irradiation. Clear Shapiro steps are also observed at the millimeter (101 GHz) and submillimeter frequency (303 GHz). The results demonstrate that the thin film bridges made by MO-CVD show an ideal ac Josephson effect.",

keywords = "Bridge junction, MO-CVD, YBCO thin film, YBCO thin film",

author = "Satoru Noge and Tsutomu Yamashita and Zhen Wang and Toshiaki Matsui and Hideyuki Kurosawa and Hisanori Yamane and Toshio Hirai",

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TY - JOUR

T1 - Bridge type josephson junctions in mo-cvd thin films

AU - Noge, Satoru

AU - Yamashita, Tsutomu

AU - Wang, Zhen

AU - Matsui, Toshiaki

AU - Kurosawa, Hideyuki

AU - Yamane, Hisanori

AU - Hirai, Toshio

PY - 1989/9/1

Y1 - 1989/9/1

N2 - Using Y1Ba2Cu3O7-xthin films, bridge type Josephson junctions are fabricated. Thin films of Y1Ba2Cu3O7-xon (100) MgO substrates are deposited by the MO-CVD method. These films exhibit zero resistance at 86 K, and a critical current density of 104to 105A/cm2at 77 K. The effect of radio frequency irradiations to the bridge are investigated. Sharp microwave-induced steps are observed up to 800 μV at 77 K for X band irradiation. Clear Shapiro steps are also observed at the millimeter (101 GHz) and submillimeter frequency (303 GHz). The results demonstrate that the thin film bridges made by MO-CVD show an ideal ac Josephson effect.

AB - Using Y1Ba2Cu3O7-xthin films, bridge type Josephson junctions are fabricated. Thin films of Y1Ba2Cu3O7-xon (100) MgO substrates are deposited by the MO-CVD method. These films exhibit zero resistance at 86 K, and a critical current density of 104to 105A/cm2at 77 K. The effect of radio frequency irradiations to the bridge are investigated. Sharp microwave-induced steps are observed up to 800 μV at 77 K for X band irradiation. Clear Shapiro steps are also observed at the millimeter (101 GHz) and submillimeter frequency (303 GHz). The results demonstrate that the thin film bridges made by MO-CVD show an ideal ac Josephson effect.

KW - Bridge junction

KW - MO-CVD

KW - YBCO thin film

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JO - Japanese Journal of Applied Physics

JF - Japanese Journal of Applied Physics

IS - 9 A

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Bridge type josephson junctions in mo-cvd thin films

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Keywords

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