Magnesium-diboride ramp-type Josephson junctions

D. Mijatovic; Alexander Brinkman; I. Oomen; Augustinus J.H.M. Rijnders; Johannes W.M. Hilgenkamp; Horst Rogalla; David H.A. Blank

Magnesium-diboride ramp-type Josephson junctions

D. Mijatovic, Alexander Brinkman, I. Oomen, Augustinus J.H.M. Rijnders, Johannes W.M. Hilgenkamp, Horst Rogalla, David H.A. Blank

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Abstract

Josephson junctions have been realized in which two superconducting magnesium-diboride (MgB2) layers are separated by a thin MgO barrier layer, using the ramp-type configuration. Their current–voltage characteristics follow the behavior described by the resistively shunted junction model, with an excess current of about 30% of the critical current Ic. A suppression of 70% of Ic was achieved in applied magnetic fields. Shapiro steps were observed by irradiating the junctions with 10.0 GHz microwaves, and the dependence of the step height on applied rf current is well described by a current–source model. Reference samples prepared without the MgO layer showed strong-link behavior with large Ic values.

Original language	Undefined
Pages (from-to)	2141-2143
Number of pages	3
Journal	Applied physics letters
Volume	80
Issue number	12
Publication status	Published - 2002

Keywords

IR-58714
METIS-206654

Access to Document

http://link.aip.org/link/?APPLAB/80/2141/1

Cite this

@article{e4a33b80d68d4b99a0731202b04f1921,

title = "Magnesium-diboride ramp-type Josephson junctions",

abstract = "Josephson junctions have been realized in which two superconducting magnesium-diboride (MgB2) layers are separated by a thin MgO barrier layer, using the ramp-type configuration. Their current–voltage characteristics follow the behavior described by the resistively shunted junction model, with an excess current of about 30% of the critical current Ic. A suppression of 70% of Ic was achieved in applied magnetic fields. Shapiro steps were observed by irradiating the junctions with 10.0 GHz microwaves, and the dependence of the step height on applied rf current is well described by a current–source model. Reference samples prepared without the MgO layer showed strong-link behavior with large Ic values.",

keywords = "IR-58714, METIS-206654",

author = "D. Mijatovic and Alexander Brinkman and I. Oomen and Rijnders, {Augustinus J.H.M.} and Hilgenkamp, {Johannes W.M.} and Horst Rogalla and Blank, {David H.A.}",

year = "2002",

language = "Undefined",

volume = "80",

pages = "2141--2143",

journal = "Applied physics letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

number = "12",

}

TY - JOUR

T1 - Magnesium-diboride ramp-type Josephson junctions

AU - Mijatovic, D.

AU - Brinkman, Alexander

AU - Oomen, I.

AU - Rijnders, Augustinus J.H.M.

AU - Hilgenkamp, Johannes W.M.

AU - Rogalla, Horst

AU - Blank, David H.A.

PY - 2002

Y1 - 2002

N2 - Josephson junctions have been realized in which two superconducting magnesium-diboride (MgB2) layers are separated by a thin MgO barrier layer, using the ramp-type configuration. Their current–voltage characteristics follow the behavior described by the resistively shunted junction model, with an excess current of about 30% of the critical current Ic. A suppression of 70% of Ic was achieved in applied magnetic fields. Shapiro steps were observed by irradiating the junctions with 10.0 GHz microwaves, and the dependence of the step height on applied rf current is well described by a current–source model. Reference samples prepared without the MgO layer showed strong-link behavior with large Ic values.

AB - Josephson junctions have been realized in which two superconducting magnesium-diboride (MgB2) layers are separated by a thin MgO barrier layer, using the ramp-type configuration. Their current–voltage characteristics follow the behavior described by the resistively shunted junction model, with an excess current of about 30% of the critical current Ic. A suppression of 70% of Ic was achieved in applied magnetic fields. Shapiro steps were observed by irradiating the junctions with 10.0 GHz microwaves, and the dependence of the step height on applied rf current is well described by a current–source model. Reference samples prepared without the MgO layer showed strong-link behavior with large Ic values.

KW - IR-58714

KW - METIS-206654

M3 - Article

SN - 0003-6951

VL - 80

SP - 2141

EP - 2143

JO - Applied physics letters

JF - Applied physics letters

IS - 12

ER -