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首页> 外文期刊>Physical review >Thermal signatures of nanoscale inhomogeneities and ferroelectric order in [PbZn_(1/3)Nb_(2/3)O_3]_(1-x)[PbTiO_3]_x
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Thermal signatures of nanoscale inhomogeneities and ferroelectric order in [PbZn_(1/3)Nb_(2/3)O_3]_(1-x)[PbTiO_3]_x

机译：[PbZn_（1/3）Nb_（2/3）O_3] _（1-x）[PbTiO_3] _x中纳米级不均匀性和铁电有序的热特征

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摘要

We present the results of thermal conductivity (k) and heat-capacity (C_p) measurements for the series of [PbZn_(1/3)Nb_(2/3)O_3]_(1-x)[PbTiO_3]_x (PZN-xPT) single crystals with 0≤z≤1. Compared to the prototypical glass-like k found in PbMg_(1/3)Nb_(2/3)O_3 (PMN). PZN shows a suppressed plateau in the temperature dependence of k. This feature of PZN resembles those of PT-doped PMN and is consistent with the coexistence of polar nanoregions (PNRs) and mesoscopic ferroelectric domains in this relaxor compound. For PT-doped PZN, the systematic behavior of k and C_p suggests that PNRs persist up to slightly beyond the morphotropic phase boundary at x≈ 0.1. The high-temperature C_p data on PZN show a broad ferroelectric anomaly, which gradually transforms to a sharp ferroelectric transition with increasing PT content.
机译：我们介绍了一系列[PbZn_（1/3）Nb_（2/3）O_3] _（1-x）[PbTiO_3] _x（PZN-的热导率（k）和热容量（C_p）的测量结果0≤z≤1的单晶。与在PbMg_（1/3）Nb_（2/3）O_3（PMN）中发现的原型玻璃状k相比。 PZN在k的温度依赖性上显示出稳定的平稳状态。 PZN的这一特征与PT掺杂的PMN相似，并且与该弛豫化合物中的极性纳米区域（PNR）和介观铁电域共存。对于掺杂PT的PZN，k和C_p的系统行为表明，PNR在x≈0.1处持续到形态相边界之外。 PZN上的高温C_p数据显示出广泛的铁电异常，随着PT含量的增加，该异常逐渐转变为尖锐的铁电转变。

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  • 来源
    《Physical review》 |2009年第9期|094115.1-094115.7|共7页
  • 作者

    Makoto Tachibana; Kenta Sasame; Hitoshi Kawaji; Tooru Atake; Eiji Takayama-Muromachi;

  • 作者单位

    National Institute for Materials Science, Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan;

    Materials and Structures laboratory, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan;

    Materials and Structures laboratory, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan;

    Materials and Structures laboratory, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan;

    National Institute for Materials Science, Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan;

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  • 关键词

    niobates, titanates, tantalates, PZT ceramics, etc.; heat capacity;

    机译：铌酸盐;钛酸盐;钽酸盐;PZT陶瓷等;热容量;

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