Zr4+-substituted single crystalline BaTi2O5 (Ba(Ti0.99Zr0.01)2O5) was prepared by the floating zone method, and its dielectric properties were investigated. The growth direction of Ba(Ti0.99Zr0.01)2O5 was parallel to the b axis. The Curie temperature of Ba(Ti0.99Zr0.01)2O5 was 710 K, which was 42 K lower than that of BaTi2O5. The complex impedance plane plot of BaTi2O5 in the b direction showed a semicircle associated with ferroelectric response and a spike associated with ionic conduction at 623 K. On the other hand, the complex impedance plot of Ba(Ti0.99Zr0.01)2O5 showed a single semicircle, suggesting almost no ionic conduction. The electrical conductivity of Ba(Ti0.99Zr0.01)2O5 was approximately half of that of BaTi2O5.
- Ferroelectric material
- Impedance Floating zone method
- Single crystal
ASJC Scopus subject areas
- Materials Science(all)