Journal
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
Volume 2, Issue 11, Pages N211-N216Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.019311jss
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Funding
- Grants-in-Aid for Scientific Research [25420718] Funding Source: KAKEN
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SrBi2(Ta1-xNbx)(1.95)M0.05O9 (x = 0 similar to 1; M=Wand Mo) were investigated from the viewpoint of ferroelectric properties, crystal and electronic structures. By P-E hysteresis-loop and dielectric-constant measurements, it was demonstrated that both the W- and Mo-substituted samples exhibited higher remanent polarization and lower Curie temperature regardless of the Ta:Nb ratio. The Rietveld technique with the neutron diffraction data indicated that the tilting angles of the (Ta,Nb,M)-O-6 octahedra and the spontaneous polarization increased by the W and Mo substitutions. Such a change in the crystal structure explained well the behavior of the ferroelectric property. From electron-density analysis using synchrotron X-ray diffraction patters, it was suggested that the bond strength within the (Ta,Nb,M)-O-6 octahetron became weaker slightly by the partial replacements of W and Mo. (C) 2013 The Electrochemical Society. All rights reserved.
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