High-field conduction in barium titanate
We present current-voltage studies of very thin ( ∼ 77 nm ) barium titanate single crystals up to 1.3 GV ∕ m applied field. These show that the mechanism of leakage current at high fields is that of space charge limited conduction (SCLC) in a regime with a continuous distribution of traps, according...
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| Veröffentlicht in: | Applied physics letters 2005-04, Vol.86 (15), p.152903-152903-3 |
|---|---|
| Hauptverfasser: | , , , , , , , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | We present current-voltage studies of very thin
(
∼
77
nm
)
barium titanate single crystals up to
1.3
GV
∕
m
applied field. These show that the mechanism of leakage current at high fields is that of space charge limited conduction (SCLC) in a regime with a continuous distribution of traps, according to the original model of
Rose
[
Phys. Rev.
97
,
1538
(
1955
)
]. This study represents a factor of
×
5
in field compared with the early studies of
Ba
Ti
O
3
conduction [
A. Branwood
,
Proc. Phys. Soc. London
79
,
1161
(
1962
)
]. Comparison is also given with ceramic multilayer barium titanate capacitors, and with variable range hopping [
B. I. Shklovskii
,
Sov. Phys. Semicond.
6
,
1964
(
1973
)
], reported in
Sr
Ti
O
3
films [
D. Fuchs
,
M. Adam
, and
R. Schneider
,
J. Phys. IV France
11
,
71
(
2001
)
]. |
|---|---|
| ISSN: | 0003-6951 1077-3118 |
| DOI: | 10.1063/1.1886899 |