We synthesized (CuO, CaO2, and BaO)y/Cu0.5Tl0.5Ba2Ca2Cu3O10−δ (y = 0, 5%, 10%, 15%) composites by solid-state reaction and characterized them by x-ray diffraction, scanning electron microscopy, dc-resistivity, and Fourier transform infrared spectroscopy. Frequency and temperature dependent dielectric properties, such as real and imaginary parts of the dielectric constant, dielectric loss, and ac-conductivity of these composites were studied by capacitance and conductance measurements as a function of frequency (10 kHz to 10 MHz) and temperature (78 to 300 K). X-ray diffraction analysis reveals that the characteristic behavior of the superconductor phase and the structure of Cu0.5Tl0.5Ba2Ca2Cu3O10−δ are nearly undisturbed by doping with nanoparticles. Scanning electron microscopy images show the improvement in the intergranular linking between the superconducting grains occurring with increasing nanoparticle concentration. Microcracks are healed up with these nanoparticles, and superconducting volume fraction is also increased. Dielectric properties of these composites strongly depend on the frequency and temperature. Zero resistivity critical temperature and dielectric properties show opposite trends with the addition of nanoparticles to the Cu0.5Tl0.5Ba2Ca2Cu3O10−δ superconductor matrix.

1.
H.
Yamamoto
,
K.
Tanaka
,
K.
Tokiwa
,
H.
Hirabayashi
,
M.
Tokumoto
,
Nawazish A.
Khan
, and
H.
Ihara
,
Physica C
302
,
137
(
1998
).
3.
K.
Tanaka
,
A.
Iyo
,
N.
Terada
,
K.
Tokiwa
,
S.
Miyashita
,
Y.
Tanaka
,
T.
Tsukamoto
,
S. K.
Agarwal
,
T.
Watanabe
, and
H.
Ihara
,
Phys. Rev. B
63
,
064508
6
(
2001
).
4.
K.
Tanaka
,
A.
Iyo
,
Y.
Tanaka
,
K.
Tokiwa
,
M.
Tokumoto
,
M.
Ariyama
,
T.
Tsukamoto
,
T.
Watanabe
, and
H.
Ihara
,
Physica B
284–288
,
1081
(
2000
).
5.
T.
Watanabe
,
S.
Miyashita
,
N.
Ichioka
,
K.
Tokiwa
,
K.
Tanaka
,
A.
Iyo
,
Y.
Tanaka
, and
H.
Ihara
,
Physica B
284–288
,
1075
(
2000
).
6.
K.
Tokiwa
,
H.
Aota
,
C.
Kunugi
,
K.
Tanaka
,
Y.
Tanaka
,
A.
Iyo
,
H.
Ihara
, and
T.
Watanabe
,
Physica B
284–288
,
1077
(
2000
).
7.
K.
Tanaka
,
A.
Iyo
,
Y.
Tanaka
,
K.
Tokiwa
,
N.
Terada
,
M.
Tokumoto
,
M.
Ariyama
,
T.
Tsukamoto
,
S.
Miyashita
,
T.
Watanabe
, and
H.
Ihara
,
Physica B
284–288
,
1079
(
2000
).
8.
H.
Ihara
,
K.
Tanaka
,
Y.
Tanaka
,
A.
Iyo
,
N.
Terada
,
M.
Tokumoto
,
M.
Ariyama
,
I.
Hase
,
A.
Sundaresan
,
N.
Hamada
,
S.
Miyashita
,
K.
Tokiwa
, and
T.
Watanabe
,
Physica C
341–348
,
487
(
2000
).
9.
H.
Ihara
,
K.
Tanaka
,
Y.
Tanaka
,
A.
Iyo
,
N.
Terada
,
M.
Tokumoto
,
F.
Tateai
,
M.
Kawamura
,
K.
Ishida
,
S.
Miyashita
, and
T.
Watanabe
,
Physica B
284–288
,
1085
(
2000
).
10.
H.
Ihara
,
A.
Iyo
,
K.
Tanaka
,
K.
Tokiwa
,
K.
Ishida
,
N.
Terada
,
M.
Tokumoto
,
Y.
Sekita
,
T.
Tsukamoto
,
T.
Watanabe
, and
M.
Umeda
,
Physica C
282
,
1973
(
1997
).
11.
A. A.
Khurram
and
Nawazish A.
Khan
,
Supercond. Sci. Technol.
19
,
679
(
2006
).
12.
N. A.
Khan
,
G.
Husnain
, and
K.
Sabeeh
,
J. Phys. Chem. Solids
67
,
1841
(
2006
).
13.
M.
Mumtaz
and
N. A.
Khan
,
Fiz. Nizk. Temp.
36
,
196
(
2010
)
M.
Mumtaz
and
N. A.
Khan
, [
Low Temp. Phys.
36
,
154
(
2010
)].
14.
N. A.
Khan
and
S.
Husnain
,
J. Alloys Compd.
475
,
652
(
2009
).
15.
P. E.
Kazin
,
M.
Jansen
,
A.
Larrea
,
G. F.
De la Fuente
, and
Yu. D.
Tretyakov
,
Physica C
253
,
391
(
1995
).
16.
P.
Majewski
,
S.
Elschner
,
B.
Hettich
,
C.
Lang
,
S.
Kaescheand
, and
F.
Aldinger
,
Supercond. Sci. Technol.
7
,
514
(
1994
).
17.
S.
Cavdar
,
H.
Koralay
,
N.
Tugluoglu
, and
A.
Gunen
,
Supercond. Sci. Technol.
18
,
1204
(
2005
).
18.
J. B.
Shi
,
Y.
Hsu
, and
C. T.
Lin
,
Physica C
299
,
272
(
1998
).
19.
M. S.
Vijaya
and
G.
Rangarajan
,
Materials Science
(
Tata McGraw-Hill Publishing Company Limited
,
New Delhi India
,
2004
).
20.
L. L.
Hench
and
J. K.
West
,
Principles of Electronic Ceramics
(
Wiley
,
New York
,
1990
).
21.
X.
Xu
,
Z.
Jiao
,
M.
Fu
,
L.
Feng
,
K.
Xu
,
R.
Zuo
, and
X.
Chen
,
Physica C
417
,
166
(
2005
).
22.
R. K.
Nkum
,
M. O.
Gyekye
, and
F.
Boakye
,
Solid. State Commun.
122
,
569
(
2002
).
23.
N. A.
Khan
,
A.
Saleem
, and
S.
Tajammul Hussain
,
J. Supercond. Novel. Magn.
25
,
1725
(
2012
).
24.
N. H.
Mohammed
,
J. Supercond. Novel. Magn.
25
,
45
(
2012
).
25.
J. C.
Maxwell
,
Electricity and Magnetism
(
Oxford University Press
,
Oxford
,
1892
), Vol.
1
, Sec. 328.
26.
You do not currently have access to this content.