Low-Temperature Raman Studies of Pb(Zr_xTi_<1-x>)O_3 and Pb_<1-3y/2>Nd_yTiO_3 Ceramics
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概要
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Raman scattering studies of lead zirconate titanate Pb(Zr_xTi_<1-x>)O_3 (PZT), 0.10 ≤ x ≤ 0.80, and Nd-modified lead titanate Pb_<1-3y/2>Nd_yTiO_3(PNT), y = 0.02, 0.10, bulk ceramics were carried out at ambient temperatures between 4.2 and 297 K. Our-measurements reveal splitting of the E ⨁ B_1 symmetry peak at low temperatures in both PZT and PNT samples. Splitting or a very asymmetrical line shape of the three other E(TO) peaks in the PZT and PNT samples was also found. These findings are related to the precursor effects. We also discuss the phase stability of lead titanate based perovskites from the point of view of our experimental results and recent theoretical calculations. A simple model explaining the differences between the low-frequency Raman spectra of tetragonal and trigonal PZTs is outlined.
- 社団法人応用物理学会の論文
- 1999-09-30
著者
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Nishio Shigeru
Materials And Structures Laboratory Tokyo Institute Of Technology
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KAKIHANA Masato
Materials and Structures Laboratory Tokyo Institute of Technology
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Lantto Vilho
Microelectronics And Materials Physics Laboratories Universtiy Of Oulu
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Lantto Vilho
Microelectronics And Materials Physics Laboratories University Of Oulu
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Nishio Satoru
Materials And Structures Laboratory Tokyo Institute Of Technology
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FRANTTI Johannes
Materials and Structures Laboratory, Tokyo Institute of Technology
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LAPPALAINEN Jyrki
Microelectronics and Materials Physics Laboratories, Universtiy of Oulu
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Lappalainen Jyrki
Microelectronics And Materials Physics Laboratories Universtiy Of Oulu
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Frantti Johannes
Materials And Structures Laboratory Tokyo Institute Of Technology
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Kakihana Masato
Materials & Structures Laboratory Tokyo Institute Of Technology
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