From frequency-dependent ac susceptibility studies of (Cu,T1)BaSrCa2Cu3Oy superconducting thin films, with and without nanodot-induced artificial pinning centers, we estimated the activation energy of flux jumps. The result was that, in the film with nanodots, the pinning potential is several times higher, leading to a probability of thermally activated flux jumps several orders of magnitude lower than in the film without artificial pinning centers. We suggest that our no cost straightforward method for creating extended defects can be successfully employed for the reduction of thermal noise in superconducting electronic devices.

1.
R. H.
Koch
,
J.
Clarke
,
W. M.
Goubau
,
J. M.
Martins
,
C. M.
Pegrum
, and
D. J.
van Harlingen
,
J. Low Temp. Phys.
51
,
207
(
1983
).
Google Scholar
 
2.
C. T.
Rogers
and
R. A.
Buhrman
,
Phys. Rev. Lett.
53
,
1272
(
1984
).
Google Scholar
 
3.
B. H.
Moeckly
and
R.
Buhrman
,
IEEE Trans. Appl. Supercond.
3
,
2038
(
1993
).
Google Scholar
 
4.
M.
Kawasaki
,
P.
Chaudair
, and
A.
Gupta
,
Phys. Rev. Lett.
68
,
1065
(
1992
).
Google Scholar
 
5.
A. H.
Miklich
,
J.
Clarke
,
M. S.
Colclough
, and
K.
Char
,
Appl. Phys. Lett.
60
,
1899
(
1992
).
Google Scholar
 
6.
M. J.
Ferrari
,
M.
Johnson
,
F. C.
Wellstood
,
J.
Clarke
,
P. A.
Rosenthal
,
R. M.
Hammond
, and
M. R.
Beasley
,
Appl. Phys. Lett.
53
,
695
(
1988
).
Google Scholar
 
7.
S.
Schöne
,
M.
Mück
, and
C.
Heiden
,
Appl. Phys. Lett.
68
,
859
(
1996
).
Google Scholar
 
8.
T. Kobayashi, T. Fujii, K. Ogawa, H. Tamai, M. Tonouchi, H. Itozaki, T. Nagaishi and F. Kamitani, in Extended Abstracts of the 8th International Superconductive Electronics Conference, edited by T. Kobayashi and M. Tonouchi, Osaka, Japan, 2001, pp. 337–338.
9.
J.
Vanacken
,
L.
Trappeniers
,
K.
Rosseel
,
I. N.
Goncharov
,
V. V.
Moshchalkov
, and
Y.
Bruynseraede
,
Physica C
332
,
411
(
2000
).
Google Scholar
 
10.
R.
Wördenweber
,
A. M.
Castellanos
, and
P.
Selders
,
Physica C
332
,
27
(
2000
).
Google Scholar
 
11.
H. Ihara and A. Crisan, Japanese Patent application No. 2001-185597 (2001).
12.
A.
Crisan
,
S.
Fujiwara
,
J. C.
Nie
,
A.
Sundaresan
, and
H.
Ihara
,
Appl. Phys. Lett.
79
,
4547
(
2001
).
Google Scholar
 
13.
P. W.
Anderson
and
Y. B.
Kim
,
Rev. Mod. Phys.
36
,
39
(
1964
).
Google Scholar
 
14.
G.
Blatter
,
M. V.
Feigel’man
,
V. B.
Geshkenbein
,
A. I.
Larkin
, and
V. M.
Vinokur
,
Rev. Mod. Phys.
66
,
1125
(
1994
).
Google Scholar
 
15.
M. V.
Feigel’man
,
V. B.
Geshkenbein
,
A. I.
Larkin
, and
V. M.
Vinokur
,
Phys. Rev. Lett.
63
,
2303
(
1989
).
Google Scholar
 
16.
M. Tinkham, Introduction to Superconductivity, 2nd ed. (McGraw–Hill, New York, 1996), p. 355.
17.
E. H.
Brandt
,
Phys. Rev. B
49
,
9024
(
1994
).
Google Scholar
 
18.
L.
Miu
,
G.
Jakob
,
P.
Haibach
,
F.
Hillmer
,
H.
Adrian
, and
C. C.
Almasan
,
Phys. Rev. B
57
,
3151
(
1998
).
Google Scholar
 
19.
A.
Crisan
,
G.
Balestrino
,
S.
Lavanga
,
P. G.
Medaglia
, and
E.
Milani
,
Physica C
313
,
70
(
1999
).
Google Scholar
 
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