| Project/Area Number |
15540307
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Condensed matter physics I
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| Research Institution | Nagoya Institute of Technology |
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Principal Investigator |
IWATA Makoto Nagoya Institute of Technology, Engineering Department, Associate professor, 工学研究科, 助教授 (40262886)
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| Co-Investigator(Kenkyū-buntansha) |
SUZUKI Ikuo Nagoya Institute of Technology, Engineering Department, Emeritus professor, 工学研究科, 名誉教授 (10023152)
MAEDA Masaki Nagoya Institute of Technology, Engineering Department, Professor, 工学研究科, 教授 (10091745)
ISHIBASHI Yoshihiro Aich Shykutoku University, Department of Business, Professor, ビジネス学部, 教授 (00023052)
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| Project Period (FY) |
2003 – 2004
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| Project Status |
Completed (Fiscal Year 2004)
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| Budget Amount *help |
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2004: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 2003: ¥2,100,000 (Direct Cost: ¥2,100,000)
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| Keywords | relaxor / MPB / AFM / domain wall / ferroelectrics / phase transition / EFM / finger print pattern / ペロプスカイト |
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| Research Abstract |
Domain wall structures in Pb(Zn_<1/3>Nb_<2/3>)O_<3^->xPbTiO_3(PZN_<-x>PT;x=0%,8%,20%) crystals were investigated using atomic force microscopy(AFM). Ferroelectric and ferroelastic domain wall structures were observed on the etched surface. In the rhombohedral phase, a zigzag domain wall structure was newly found. We showed that all of the ferroelastic domain wall structures observed in the tetragonal and rhombohedral phases can be explained by the Sapriel theory, and concluded that no ferroelectric charged domain wall exists in the PZN_<-x>PT(x=8%,20%) crystal without an external field. The symmetry of the crystal phase in PZN-8%PT at room temperature is discussed. It was also found that finger print pattern in PZN disappears after the poling process even in the weak field of about 50 V/cm which is about 1/20 of the coercive field.
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