Abstract
Sr0·5Ba0·5Bi2Nb2O9 ceramic was prepared by a conventional solid state reaction method and studied using X-ray powder diffraction and dielectric measurements. At room temperature, an orthorhombic structure was confirmed and their parameters were obtained using the Rietveld method. Dielectric properties were studied in a broad range of temperatures and frequencies. Typical relaxor behaviour was observed with strong dispersion of the complex relative dielectric permittivity. The temperature of the maximum dielectric constant Tm decreases with increasing frequency, and shifts towards higher temperature side. The activation energy Ea≍0·194±0·003 eV and freezing temperature Tf ≍371±2 K values were found using the Vögel-Fulcher relationship. Conduction process in the material may be due to the hopping of charge carriers at low temperatures and small polarons and/or singly ionised oxygen vacancies at higher temperatures.
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References
1.
Smolenskii
G. A.
,
Bokov
V. A.
,
Isupov
V. A.
,
Krainik
N. N.
,
Pasynkov
R. E.
,
Sokolov
A. I.
and
Yushin
N. K.
Ferroelectrics and related phenomena‘; 1981 , New York , Gordon and Breach .
2.
Aurivillius
B.
: Ark. Kemi. , 1950 , 1 , 463 –480 .
3.
Smolenskii
G. A.
,
Isupov
V. A.
and
Agranovskaya
A. I.
Soy. Phys. Solid State , 1961 , 3 , 651 –655 .
4.
Kholkin
A. L.
,
Avdeev
M.
,
Costa
M. E. V.
,
Baptista
J. L.
and
Dorogovtsev
S. N.
Appl. Phys. Lett. , 2001 , 79 , 662 –664 .
5.
Ismunandar
B. J
. Kennedy, Gunawan and Marsongkohadi : J. Solid State Chem. , 1996 , 126 , 135 –141 .
6.
Ismunandar and B
. J. Kennedy : J. Mater. Chem. , 1999 ,9 , 541 –544 .
7.
Huang
S.
,
Feng
C.
,
Chen
L.
and
Wang
Q.
J. Amer. Ceram. Soc. , 2006 , 89 , 328 –331 .
8.
Weast
R. C.
and
Astle
M. J.
CRC handbook of chemistry and physics‘ , 61st edn ; 1974 , Boca Raton , FL, CRC Press .
9.
Rietveld
H. M.
: Acta Crystallogr. , 1967 , 22 , 151 –152 .
10.
Larson
A. C.
and
von Dreele
R. B.
General structure analysis system‘, GSAS Los Alamos National Laboratory Report LAUR 86 –748 , 1994 .
11.
Toby
B. H.
: J. Appl. Cryst. , 2001 , 34 , 210 –213 .
12.
Thompson
P.
,
Cox
D. E.
and
Hastings
J. B.
J. Appl. Crystallogr. , 1987 , 20 , 79 –83 .
13.
Miranda
C.
,
Costa
M. E. V.
,
Avdeev
M.
,
Kholkin
A. L.
and
Baptista
J. L.
J. Eur. Ceram. Soc. , 2001 , 21 , 1303 –1306 .
14.
Blake
S. M.
,
Falconer
M. J.
,
McCreedy
M.
and
Lightfoot
P.
J. Mater. Chem. , 1997 , 7 , 1609 –1613 .
15.
Cross
L. E.
: Ferroelectrics , 1994 , 151 , 305 –320 .
16.
Withers
R. L.
,
Thompson
J. G.
and
Rae
A. D.
J. Solid State Chem. , 1991 , 94 , 404 –417 .
17.
Karthik
C.
,
Ravishankar
N.
,
Varma
K. B. R.
,
Maglione
M.
,
Vondermuhll
R.
and
Etourneau
J.
Appl. Phys. Lett. , 2006 , 89 , 042905 –042907 .
18.
Karthik
C
,
Ravishankar
N.
,
Maglione
M.
,
Vondermuhll
R
,
Etourneau
J.
and
Varma
K. B. R.
Solid State Commun. , 2006 , 139 , 268 –272 .
19.
Setter
N.
and
Cross
L. E.
J. Mater. Set , 1980 , 15 , 2478 –2482 .
20.
Chen
I.-W.
,
Li
P.
and
Wang
Y.
J. Phys. Chem. Solids , 1996 , 57 , 1525 –1536 .
21.
Cross
L. E.
: Ferroelectrics , 1987 , 76 , 241 –267 .
22.
Huang
S. M.
,
Sun
L.
,
Feng
C. D.
and
Chen
L. D.
J. Appl. Phys. , 2006 , 99 , 076104 –076106 .
23.
Adamczyk
M.
,
Ujma
Z.
and
Paweczyk
M.
J Mater Sci. , 2006 , 41 , 5317 –5322 .
24.
Sun
L.
,
Feng
C.
,
Chen
L.
and
Huang
S.
J. Am. Ceram. Soc. , 2007 , 90 , 322 –326 .
25.
Sun
L.
,
Feng
C.
,
Chen
L.
and
Huang
S.
J. Am. Ceram. Soc. , 2007 , 90 , 3875 –3881
26.
Dorogovtsev
S. N.
and
Yushin
N. K.
Ferroelectrics , 1990 , 112 , 27 –44 .
27.
Uchino
K.
and
Nomura
S.
Ferroelectrics , 1982 , 44 , 55 –61 .
28.
Clrake
R.
and
Burfoot
J. C.
Ferroelectrics , 1974 , 8 , 505 –506 .
29.
Huang
S.
,
Feng
C.
,
Chen
L.
and
Wen
X.
Solid State Commun. , 2005 , 133 , 375 –379 .
30.
Vogel
H.
: Phys. Z , 1921 , 22 , 645 –646 .
31.
Fulcher
G.
: J. Amer. Ceram. Soc. , 1925 , 8 , 339 –355 .
32.
Néel
L.
: Compt. Rend Acad Sci. Paris , 1949 , 228 , 664 –666 .
33.
Viehland
D.
,
Jang
S. J.
and
Cross
L. E.
J. Appl. Phys. , 1990 , 68 , 2916 –2921 .
34.
Kamba
S.
,
Bovtun
V.
,
Petzelt
J.
,
Rychetsky
I.
,
Mizaras
R.
,
Brilingas
A.
,
Banys
J.
,
Grigas
J.
and
Kosec
M.
J. Phys. Condens. Matter , 2000 , 12 , 497 –591 .
35.
Karthik
C.
and
Varma
K. B. R
J. Phys. Chem. Solids , 2006 , 67 , 2437 –2441 .
36.
Prasad
N. V.
,
Prasad
G.
,
Bhimasankaram
T.
,
Suryanarayana
S. V.
and
Kumar
G. S.
Bull. Mater. Sci. , 2001 , 24 , 487 –495 .
37.
Patankar
K. K.
,
Mathe
V. L.
,
Patil
A. N.
,
Patil
S. A.
,
Lotke
S. D.
,
Kolekar
Y. D.
and
Joshi
P. B.
J. Electroceram. , 2001 ,6 , 115 –122 .
38.
Kotomin
E. A.
,
Eglitis
R. I.
and
Borstel
G.
J. Phys. Condens. Matter , 2000 , 12 , L557—L562.
39.
Morrison
F. D.
,
Sinclair
D. C.
and
West
A. R.
J. Appl. Phys. , 1999 , 86 , 6355 –6366 .
40.
Ang
C.
Yu
Z.
and
Cross
L. E.
Phy. Rev. B , 2003 , 62B , 228 –236
41.
Kang
B. S.
,
Choi
S. K.
and
Park
C. H.
J. Appl. Phys. , 2003 , 94 , 1904 –1911 .
42.
Kumar
M. M.
and
Ye
Z.-G.
J. Appl. Phys. , 2001 , 90 , 934 –941 .
43.
Raymond
O.
,
Font, N. Suarez-Almodovar
R.
,
Portelles
J.
and
Siqueiros:
J. M.
J. Appl. Phys. , 2005 , 97 , 084107 –084114 .
44.
Molak
A.
,
Talik
E.
,
Kruczek
M.
,
Paluch
M.
,
Ratuszna
A.
and
Ujma
Z.
Mater. Sci. Eng. B , 2006 , B128 , 16 –24 .
45.
Salsow
W. M.
: Phys. Rev. B , 1988 , 37B , 676 –678 .
46.
Tagantsev
A. K.
, Phys. Rev. Lett. , 1994 , 72 , 1100 –1103 .