TY - JOUR
T1 - Doping effect on ferroelectric microstructure in YMn1-xTi xO3
AU - Mori, S.
AU - Tokunaga, J.
AU - Horibe, Y.
AU - Asada, T.
AU - Koyama, Y.
AU - Katsufuji, T.
N1 - Funding Information:
This work was supported by Grant-in-Aid for Scientific Researches from Ministry of Education, Culture, Sports, Science and Technology. One of the authors (S.M) was supported by the IKETANI Science Foundation.
PY - 2007
Y1 - 2007
N2 - We have investigated microstructures related to anomalous ferroelectric properties such as the magnetocapacitance effect in magnetic ferroelectric compounds YMn1 - xTixO3 and (Y,A)Mn0.825Ti0.175O3 (A = La, Ca, Zr) mainly by the transmission electron microscopy. It is found that the size of the ferroelectric domains in YMn1 - xTixO3 depends strongly on the Ti concentration (x) and the size is estimated to be about 10-20 nm in the x = 0.175 compound. In addition, structural change from the ferroelectric P63 cm phase to the rhombohedral one was found in the x = 0.40 compound. On the other hand, characteristic diffuse scattering elongating along both the [001] and [110] direction was found in (Y,Zr)Mn0.825Ti0.175O3, which is similar to that found in the x = 0.175 compound. It is revealed that the partial substitution in YMnO3 breaks the long-ranged FE ordering and structural fluctuation is induced, which should be responsible for the anomalous FE behaviors in these compounds.
AB - We have investigated microstructures related to anomalous ferroelectric properties such as the magnetocapacitance effect in magnetic ferroelectric compounds YMn1 - xTixO3 and (Y,A)Mn0.825Ti0.175O3 (A = La, Ca, Zr) mainly by the transmission electron microscopy. It is found that the size of the ferroelectric domains in YMn1 - xTixO3 depends strongly on the Ti concentration (x) and the size is estimated to be about 10-20 nm in the x = 0.175 compound. In addition, structural change from the ferroelectric P63 cm phase to the rhombohedral one was found in the x = 0.40 compound. On the other hand, characteristic diffuse scattering elongating along both the [001] and [110] direction was found in (Y,Zr)Mn0.825Ti0.175O3, which is similar to that found in the x = 0.175 compound. It is revealed that the partial substitution in YMnO3 breaks the long-ranged FE ordering and structural fluctuation is induced, which should be responsible for the anomalous FE behaviors in these compounds.
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U2 - 10.1080/00150190701196393
DO - 10.1080/00150190701196393
M3 - Conference article
AN - SCOPUS:34547448737
SN - 0015-0193
VL - 348
SP - 170
EP - 176
JO - Ferroelectrics
JF - Ferroelectrics
T2 - 8th Russia/CIS/Baltic/Japan Symposium on Ferroelectricity, RCBJSF-8
Y2 - 15 May 2006 through 19 May 2006
ER -