Abstract
The mixed-oxide system Ba(Ti 1-xZr x)O 3 (BTZ) with the simple perovskite structure was reported to exhibit the remarkable dielectric response around x = 0.08. In order to understand the origin of the response, we have investigated the crystallographic features of ferroelectric states in BTZ with 0 ≤ x ≤ 0.15 mainly by transmission electron microscopy. According to the constructed phase diagram of BTZ, when the Zr content increases from x = 0 around 300 K, the ferroelectric tetragonal state in BaTiO3 is changed into the ferroelectric orthorhombic state around x = 0.03, and then into the ferroelectric monoclinic state around x = 0.06. That is, the monoclinic state with a polarization vector in the {110}PC planes is present in BTZ with 0.07 ≤ x ≤ 0.15, where the subscript PC denotes the paraelectric cubic state. The notable feature of the monoclinic state is that it exhibits the herringbone-type domain structure consisting of nanometer-sized ferroelectric domains. It is thus understood that the remarkable dielectric response in BTZ should be associated with the presence of nanometer-sized domains with the monoclinic symmetry.
| Original language | English |
|---|---|
| Title of host publication | Advanced Materials Research |
| Pages | 555-560 |
| Number of pages | 6 |
| Volume | 409 |
| DOIs | |
| Publication status | Published - 2012 |
| Event | 7th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC'2011 - Quebec City, QC Duration: 2011 Aug 1 → 2011 Aug 5 |
Publication series
| Name | Advanced Materials Research |
|---|---|
| Volume | 409 |
| ISSN (Print) | 10226680 |
Other
| Other | 7th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC'2011 |
|---|---|
| City | Quebec City, QC |
| Period | 11/8/1 → 11/8/5 |
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Keywords
- Ba(Ti Zr )O
- Dielectric response
- Ferroelectric domain structure
- Morphotropic phase boundary
- Transmission electron microscopy
ASJC Scopus subject areas
- Engineering(all)
Cite this
Presence of the ferroelectric monoclinic state in the mixed ferroelectric system Ba(Ti 1-xZr x)O 3 . / Tsukasaki, Hirofumi; Koyama, Yasumasa.
Advanced Materials Research. Vol. 409 2012. p. 555-560 (Advanced Materials Research; Vol. 409).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Presence of the ferroelectric monoclinic state in the mixed ferroelectric system Ba(Ti 1-xZr x)O 3
AU - Tsukasaki, Hirofumi
AU - Koyama, Yasumasa
PY - 2012
Y1 - 2012
N2 - The mixed-oxide system Ba(Ti 1-xZr x)O 3 (BTZ) with the simple perovskite structure was reported to exhibit the remarkable dielectric response around x = 0.08. In order to understand the origin of the response, we have investigated the crystallographic features of ferroelectric states in BTZ with 0 ≤ x ≤ 0.15 mainly by transmission electron microscopy. According to the constructed phase diagram of BTZ, when the Zr content increases from x = 0 around 300 K, the ferroelectric tetragonal state in BaTiO3 is changed into the ferroelectric orthorhombic state around x = 0.03, and then into the ferroelectric monoclinic state around x = 0.06. That is, the monoclinic state with a polarization vector in the {110}PC planes is present in BTZ with 0.07 ≤ x ≤ 0.15, where the subscript PC denotes the paraelectric cubic state. The notable feature of the monoclinic state is that it exhibits the herringbone-type domain structure consisting of nanometer-sized ferroelectric domains. It is thus understood that the remarkable dielectric response in BTZ should be associated with the presence of nanometer-sized domains with the monoclinic symmetry.
AB - The mixed-oxide system Ba(Ti 1-xZr x)O 3 (BTZ) with the simple perovskite structure was reported to exhibit the remarkable dielectric response around x = 0.08. In order to understand the origin of the response, we have investigated the crystallographic features of ferroelectric states in BTZ with 0 ≤ x ≤ 0.15 mainly by transmission electron microscopy. According to the constructed phase diagram of BTZ, when the Zr content increases from x = 0 around 300 K, the ferroelectric tetragonal state in BaTiO3 is changed into the ferroelectric orthorhombic state around x = 0.03, and then into the ferroelectric monoclinic state around x = 0.06. That is, the monoclinic state with a polarization vector in the {110}PC planes is present in BTZ with 0.07 ≤ x ≤ 0.15, where the subscript PC denotes the paraelectric cubic state. The notable feature of the monoclinic state is that it exhibits the herringbone-type domain structure consisting of nanometer-sized ferroelectric domains. It is thus understood that the remarkable dielectric response in BTZ should be associated with the presence of nanometer-sized domains with the monoclinic symmetry.
KW - Ba(Ti Zr )O
KW - Dielectric response
KW - Ferroelectric domain structure
KW - Morphotropic phase boundary
KW - Transmission electron microscopy
UR - http://www.scopus.com/inward/record.url?scp=84855251169&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84855251169&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/AMR.409.555
DO - 10.4028/www.scientific.net/AMR.409.555
M3 - Conference contribution
AN - SCOPUS:84855251169
SN - 9783037853047
VL - 409
T3 - Advanced Materials Research
SP - 555
EP - 560
BT - Advanced Materials Research
ER -