2010 Fiscal Year Final Research Report
Thermal conductivity of ferroelectric nanoregions and the exploration of morphotropic phase boundary through high-pressure synthesis
| Project/Area Number |
20740178
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Condensed matter physics I
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
TACHIBANA Makoto National Institute for Materials Science, 超伝導材料センター, 主任研究員 (40442727)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 誘電体 |
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| Research Abstract |
Although relaxor ferroelectrics are known for their exceptional piezoelectric properties, the nanoscale phase separation phenomena found in these materials are not well understood. The specific heat and thermal conductivity measurements on the typical relaxor ferroelectrics (1-x)Pb(Mg_<1/3>Nb_<2/3>)O_3-xPbTiO_3 and (1-x)Pb(Zn_<1/3>Nb_<2/3>)O_3-xPbTiO_3 showed that the thermal properties change from glasslike to crystal-like as the size of ferroelectric regions grow from nanoscale to macroscale.
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