TY - JOUR
T1 - Effective symmetry and physical properties of twinned perovskite ferroelectric single crystals
AU - Erhart, Jiří
AU - Cao, Wenwu
N1 - Funding Information:
This work was supported by the National Science Foundation under Grant No. DNS 9704714 and by the Office of Naval Research under Grant Nos. N00014-98-1-0527 and N00014-96-1-1173. One of the authors (J.E.) is also grateful for partial support from the Ministry of Education of the Czech Republic (Code VS 96006, 1996).
PY - 2001/2
Y1 - 2001/2
N2 - The effective symmetry and material properties of twinned ferroelectric crystals with perovskite structure were analyzed. The twins or twinbands studied here were formed during ferroelectric phase transitions, which resulted in one of the following symmetry changes: m3̄m → 3m, m3̄m → 4mm, and m3̄m → mm2. It was found that the volume ratios of the two domains in a twin structure were not always equal due to the existence of defect pinning to the domain walls. This unequal partition changed the effective symmetry; hence, the effective macroscopic physical properties of the twin system. Using the data of LiNbO3, BaTiO3, and KNbO3, a detailed analysis has been carried out on macroscopic material property changes caused by the deviation from t equal domain volume partition for crystals having 3m, 4mm, and mm2 symmetries.
AB - The effective symmetry and material properties of twinned ferroelectric crystals with perovskite structure were analyzed. The twins or twinbands studied here were formed during ferroelectric phase transitions, which resulted in one of the following symmetry changes: m3̄m → 3m, m3̄m → 4mm, and m3̄m → mm2. It was found that the volume ratios of the two domains in a twin structure were not always equal due to the existence of defect pinning to the domain walls. This unequal partition changed the effective symmetry; hence, the effective macroscopic physical properties of the twin system. Using the data of LiNbO3, BaTiO3, and KNbO3, a detailed analysis has been carried out on macroscopic material property changes caused by the deviation from t equal domain volume partition for crystals having 3m, 4mm, and mm2 symmetries.
UR - https://www.scopus.com/pages/publications/0035262052
UR - https://www.scopus.com/pages/publications/0035262052#tab=citedBy
U2 - 10.1557/JMR.2001.0082
DO - 10.1557/JMR.2001.0082
M3 - Article
AN - SCOPUS:0035262052
SN - 0884-2914
VL - 16
SP - 570
EP - 577
JO - Journal of Materials Research
JF - Journal of Materials Research
IS - 2
ER -