Relaxation dynamics of lead-free (Na1/2Bi1/2)TiO3-BaTiO3 single crystals studied by Brillouin scattering
文献类型：期刊论文
| 作者 | Lee, Byoung Wan1; Ko, Jae-Hyeon1; Li, Xiaobing2; Luo, Haosu2 |
| 刊名 | PHYSICA B-CONDENSED MATTER
 |
| 出版日期 | 2016-10-01 |
| 卷号 | 498页码:72-75 |
| 关键词 | NBT-BT Lead-free Relaxor Polar nanoregion Brillouin scattering |
| 英文摘要 | The acoustic properties of 0.95(Na1/2Bi1/2)TiO3-0.05BaTiO(3) (NBT-0.05BT) single crystals were investigated in a hypersonic frequency range and compared to those of archetypal relaxor Pb(Mg1/3Nb2/3) O-3 (PMN). Temperature dependences of the Brillouin frequency shift of the longitudinal acoustic (LA) mode, as well as its half width, of NBT-5%BT and PMN exhibited diffuse and broad anomalies over a wide temperature range, which were related to the softening of the sound velocity and substantial increase in the hypersonic damping toward the dielectric maximum temperature. These broad acoustic anomalies of unpoled NBT-0.05BT suggest the existence of noncentrosymmetric polar nanoregions in the paraelectric phase which do not evolve into a long-range ferroelectric order. The calculated relaxation times of NBT-0.05BT exhibited much longer values compared to those of PMN, which suggests that the size of polar nanoregions of NBT-0.05BT is larger than that of PMN. (C) 2016 Elsevier B.V. All rights reserved. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Physics, Condensed Matter |
| 研究领域[WOS] | Physics |
| 关键词[WOS] | PHASE-TRANSITIONS ; SPECTROSCOPY |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000380411900012 |
| 源URL | [http://ir.sic.ac.cn/handle/331005/22096]  |
| 专题 | 上海硅酸盐研究所_无机功能材料与器件重点实验室_期刊论文 |
| 作者单位 | 1.Hallym Univ, Dept Phys, Chunchon 24252, Gangwondo, South Korea 2.Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 201800, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lee, Byoung Wan,Ko, Jae-Hyeon,Li, Xiaobing,et al. Relaxation dynamics of lead-free (Na1/2Bi1/2)TiO3-BaTiO3 single crystals studied by Brillouin scattering[J]. PHYSICA B-CONDENSED MATTER,2016,498:72-75. |
| APA | Lee, Byoung Wan,Ko, Jae-Hyeon,Li, Xiaobing,&Luo, Haosu.(2016).Relaxation dynamics of lead-free (Na1/2Bi1/2)TiO3-BaTiO3 single crystals studied by Brillouin scattering.PHYSICA B-CONDENSED MATTER,498,72-75. |
| MLA | Lee, Byoung Wan,et al."Relaxation dynamics of lead-free (Na1/2Bi1/2)TiO3-BaTiO3 single crystals studied by Brillouin scattering".PHYSICA B-CONDENSED MATTER 498(2016):72-75. |
入库方式： OAI收割
来源：上海硅酸盐研究所
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