We present a study of the microwave characteristics of Josephson junctions based on a superconductor–insulator–normal–insulator–superconductor sandwich, fabricated in Nb/Al/AlOx technology. With the nonhysteretic Shapiro steps and the small parameter spread observed, the junctions are suitable for programmable Josephson voltage standards. Their characteristic voltage Vc≈100 μV enables operation at microwave frequencies up to 100 GHz.

Topics
Josephson effect, Superconducting devices, Superconductors, Microwave frequencies
1.
C. A.
Hamilton
,
F. L.
Lloyd
,
K.
Chieh
, and
C.
Goeke
,
IEEE Trans. Instrum. Meas.
38
,
314
(
1989
).
Google Scholar
Crossref
Search ADS
 
2.
R.
Pöpel
,
J.
Niemeyer
,
R.
Fromknecht
,
W.
Meier
,
L.
Grimm
, and
W. F.
Dünnschede
,
IEEE Trans. Instrum. Meas.
40
,
298
(
1991
).
Google Scholar
Crossref
Search ADS
 
3.
Y.
Murayama
,
Y.
Sakamoto
,
A.
Iwasa
,
M.
Nakanishi
,
H.
Yoshida
,
U.
Klein
, and
T.
Endo
,
IEEE Trans. Instrum. Meas.
44
,
219
(
1995
).
Google Scholar
Crossref
Search ADS
 
4.
C. A.
Hamilton
and
C. J.
Burroughs
,
IEEE Trans. Instrum. Meas.
44
,
238
(
1995
).
Google Scholar
Crossref
Search ADS
 
5.
C. A.
Hamilton
,
C. J.
Burroughs
, and
R. L.
Kautz
,
IEEE Trans. Instrum. Meas.
44
,
233
(
1995
).
Google Scholar
 
6.
S. P.
Benz
,
C. A.
Hamilton
,
C. J.
Burroughs
,
T. E.
Harvey
, and
L. A.
Christian
,
Appl. Phys. Lett.
71
,
1866
(
1997
).
Google Scholar
Crossref
Search ADS
 
7.
C. A.
Hamilton
,
C. J.
Burroughs
,
S. P.
Benz
, and
J. R.
Kinard
,
IEEE Trans. Instrum. Meas.
46
,
224
(
1996
).
Google Scholar
Crossref
Search ADS
 
8.
M. Yu.
Kupriyanov
and
V. F.
Lukichev
,
Sov. Phys. JETP
67
,
1163
(
1988
).
Google Scholar
 
9.
L.
Capogna
and
M. G.
Blamire
,
Phys. Rev. B
53
,
5683
(
1996
).
Google Scholar
Crossref
Search ADS
 
10.
M.
Maezawa
and
A.
Shoji
,
Appl. Phys. Lett.
70
,
3603
(
1997
).
Google Scholar
Crossref
Search ADS
 
11.
H.
Sugiyama
,
A.
Yanada
,
M.
Ota
,
A.
Fujimaki
, and
H.
Hayakawa
,
Jpn. J. Appl. Phys., Part 2
36
,
1157
(
1997
).
Google Scholar
Crossref
Search ADS
 
12.
F.
Müller
,
J.
Kohlmann
,
F. X.
Hebrank
,
T.
Weimann
,
H.
Wolf
, and
J.
Niemeyer
,
IEEE Trans. Appl. Supercond.
5
,
2903
(
1995
).
Google Scholar
Crossref
Search ADS
 
13.
R. L.
Kautz
,
J. Appl. Phys.
76
,
5540
(
1994
).
Google Scholar
Crossref
Search ADS
 
This content is only available via PDF.
© 1998 American Institute of Physics.
1998
American Institute of Physics
You do not currently have access to this content.