• 한국초전도학회:학술대회논문집
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• v.11
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• pp.45-45
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• 2001

• 한국초전도학회:학술대회논문집
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• v.12
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• pp.29-29
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• 2002

• 한국초전도학회:학술대회논문집
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• v.12
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• pp.54-54
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• 2002

• 한국초전도학회:학술대회논문집
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• v.12
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• pp.55-55
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• 2002

• 한국초전도학회:학술대회논문집
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• v.12
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• pp.6-6
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• 2002

• 한국초전도학회:학술대회논문집
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• v.12
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• pp.28-28
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• 2002

• 한국초전도학회:학술대회논문집
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• v.12
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• pp.38-38
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• 2002

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2010.11a
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• pp.365-366
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• 2010

• 한국초전도학회:학술대회논문집
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• v.9
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• pp.91-94
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• 1999

A new type of high-T$_c$ superconducting Josephson junctions has been prepared by Ar ion beam etching and electron beam lithography. YBa$_2Cu_3O_{7-x}$ (YBCO) films deposited on (001) SrTiO$_3$ single crystal substrate by pulsed laser deposition were patterned by Ar ion milling with photolithography. The narrow slit with a electroresist mask, about 1000 ${\AA}$ wide, was constructed over a 3 ${\sim}$ 5 ${\mu}$m bridge of a 1200-${\AA}$-thick YBCO film by electron beam lithography. The slit was then etched by the Ar ion beam to form a damaged 600-${\AA}$-thick YBCO. Thus prepared structure forms an S-N-S (YBCO - damaged YBCO - YBCO) type Josephson junctions. Those junctions exhibit RSI-like I-V characteristics at 77 K. The properties of the Josephson junctions such as I$_c$ R$_N$, and J$_c$ were characterized.

• 한국초전도학회:학술대회논문집
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• v.9
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• pp.178-184
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• 1999

We have measured I-V characteristics of Bi$_2Sr_2CaCu_2O_{8+{\delta}}$ mesa containing a small number of intrinsic stacked Josephson junctions in a magnetic field. We fabricated mesa with an area of 40${\times}$40 ${\mu}$m$^2$ containing 3${\sim}$20 intrinsic junctions. We applied magnetic field perpendicular to He CuO$_2$ planes up to 5T. We observed flux-flow branches and flux-flow steps in the I-V characteristics which might be due to collective motion of Josephson vortices in the long junction limit. In a parallel field, critical current I$_c$ varies as I$_c$(B) ${\sim}$ exp(-B/B$_0$), where B$_0$ is about 2T, which is consistent with the theoretical model. DC and AC intrinsic Josephson effects are also discussed.