High- JcMgB2Josephson junctions with operating temperature up to 40 K

Ke Chen; C. G. Zhuang; Qi Li; Ye Zhu; P. M. Voyles; X. Weng; J. M. Redwing; R. K. Singh; A. W. Kleinsasser; X. X. Xi

doi:10.1063/1.3298366

High- J_cMgB₂Josephson junctions with operating temperature up to 40 K

Ke Chen, C. G. Zhuang, Qi Li, Ye Zhu, P. M. Voyles, X. Weng, J. M. Redwing, R. K. Singh, A. W. Kleinsasser, X. X. Xi

Research output: Journal article publication › Journal article › Academic research › peer-review

30 Citations (Scopus)

Abstract

Sandwich-type MgB2/MgO/MgB2Josephson junctions with Au or MgB2interconnection were fabricated using hybrid physical-chemical vapor deposited MgB2thin films and RF-magnetron-sputtered MgO barrier. The junctions show properties similar to those in high-JcNb junctions with Jcup to 275kA/cm2at 4 K, which remains nonzero up to 40 K. Critical current modulations by applied magnetic field and constant voltage steps under microwave radiation were observed. Combined with the larger energy gaps in MgB2than in Nb, the junctions presented here allow simple MgB2digital circuits to work over 20 K or with a clock speed above 1 THz.

Original language	English
Article number	042506
Journal	Applied Physics Letters
Volume	96
Issue number	4
DOIs	https://doi.org/10.1063/1.3298366
Publication status	Published - 8 Feb 2010
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.3298366

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title = "High- JcMgB2Josephson junctions with operating temperature up to 40 K",

abstract = "Sandwich-type MgB2/MgO/MgB2Josephson junctions with Au or MgB2interconnection were fabricated using hybrid physical-chemical vapor deposited MgB2thin films and RF-magnetron-sputtered MgO barrier. The junctions show properties similar to those in high-JcNb junctions with Jcup to 275kA/cm2at 4 K, which remains nonzero up to 40 K. Critical current modulations by applied magnetic field and constant voltage steps under microwave radiation were observed. Combined with the larger energy gaps in MgB2than in Nb, the junctions presented here allow simple MgB2digital circuits to work over 20 K or with a clock speed above 1 THz.",

author = "Ke Chen and Zhuang, {C. G.} and Qi Li and Ye Zhu and Voyles, {P. M.} and X. Weng and Redwing, {J. M.} and Singh, {R. K.} and Kleinsasser, {A. W.} and Xi, {X. X.}",

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T1 - High- JcMgB2Josephson junctions with operating temperature up to 40 K

AU - Chen, Ke

AU - Zhuang, C. G.

AU - Li, Qi

AU - Zhu, Ye

AU - Voyles, P. M.

AU - Weng, X.

AU - Redwing, J. M.

AU - Singh, R. K.

AU - Kleinsasser, A. W.

AU - Xi, X. X.

PY - 2010/2/8

Y1 - 2010/2/8

N2 - Sandwich-type MgB2/MgO/MgB2Josephson junctions with Au or MgB2interconnection were fabricated using hybrid physical-chemical vapor deposited MgB2thin films and RF-magnetron-sputtered MgO barrier. The junctions show properties similar to those in high-JcNb junctions with Jcup to 275kA/cm2at 4 K, which remains nonzero up to 40 K. Critical current modulations by applied magnetic field and constant voltage steps under microwave radiation were observed. Combined with the larger energy gaps in MgB2than in Nb, the junctions presented here allow simple MgB2digital circuits to work over 20 K or with a clock speed above 1 THz.

AB - Sandwich-type MgB2/MgO/MgB2Josephson junctions with Au or MgB2interconnection were fabricated using hybrid physical-chemical vapor deposited MgB2thin films and RF-magnetron-sputtered MgO barrier. The junctions show properties similar to those in high-JcNb junctions with Jcup to 275kA/cm2at 4 K, which remains nonzero up to 40 K. Critical current modulations by applied magnetic field and constant voltage steps under microwave radiation were observed. Combined with the larger energy gaps in MgB2than in Nb, the junctions presented here allow simple MgB2digital circuits to work over 20 K or with a clock speed above 1 THz.

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DO - 10.1063/1.3298366

M3 - Journal article

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JO - Applied Physics Letters

JF - Applied Physics Letters

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ER -

High- J_cMgB₂Josephson junctions with operating temperature up to 40 K

Abstract

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