2016
DOI: 10.1103/physrevb.94.214101
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Domain wall motion and precursor dynamics inPbZrO3

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Cited by 12 publications
(10 citation statements)
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References 82 publications
(80 reference statements)
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“…Understanding domain wall motion in ferroic materials is not only of pure scientific interest, but is also important for technical applications [1][2][3][4] . Movements of domain walls (DW's) subject to external forces were shown to cause anomalously high values of susceptibility in some ferroelectrics [5][6][7][8] and ferroelastics [9][10][11][12][13] below the phase transition temperature T c . The domain wall response is very sensitive to changes of external conditions, i.e.…”
Section: Introductionmentioning
confidence: 99%
“…Understanding domain wall motion in ferroic materials is not only of pure scientific interest, but is also important for technical applications [1][2][3][4] . Movements of domain walls (DW's) subject to external forces were shown to cause anomalously high values of susceptibility in some ferroelectrics [5][6][7][8] and ferroelastics [9][10][11][12][13] below the phase transition temperature T c . The domain wall response is very sensitive to changes of external conditions, i.e.…”
Section: Introductionmentioning
confidence: 99%
“…DMA 的工作原理如图 2 所示 [22] 。在设定温度 程序后(线性升温、降温、恒温或其组合), 对样品施 加单频或多频周期正弦波的动态振荡力, 样品将产 图 2 动态热机械分析仪(DMA)工作原理图 [22] Fig. 2 Schematic diagram of dynamic mechanical analysis (DMA) [22] 生响应的周期波动形变, 该形变将经传感器并结合 相关的参数, 经数据处理得到储能模量 Eʹ、损耗模 [23] 。同时, 弛豫、相界移动和新相形核均能产生 机械损耗峰。因此, 通过 DMA 记录样品的模量和 损耗随温度的变化, 可以分析被测样品的相变、缺 陷和弛豫等信息 [24][25][26][27] [30] 也通过 DMA 研究了 BNT-BT 体系陶瓷的力学特征, 探测到了低温段的铁电-反 铁电相变, 以及较高温度段的反铁电-顺电相相变。 Puchberger 等 [31] 利用 DMA 研究了 PbZrO 3 单晶 的电畴移动, 当施加的外力与单畴方向不同时, 对 单晶的相变具有不同影响, 其中当外力方向与单畴 图 3 BZT-BCT 陶瓷的模量(a)和损耗因子(b)与温度的关系 [28] Fig. 3 Dependence of modulus (a) and loss factor (b) on temperature for BZT-BCT ceramic [28] 垂直时, 在反铁电相变处(510 K)会出现类似本征行 为的弹性异常峰(图 5)。由上文可知, 由于模量对相 变的高敏感度, DMA 可以作为检测铁电材料相变的 有效手段。 图 4 BNT-BT 陶瓷介电温谱(a)和力学图谱(b) [29] Fig.…”
unclassified
“…3 Dependence of modulus (a) and loss factor (b) on temperature for BZT-BCT ceramic [28] 垂直时, 在反铁电相变处(510 K)会出现类似本征行 为的弹性异常峰(图 5)。由上文可知, 由于模量对相 变的高敏感度, DMA 可以作为检测铁电材料相变的 有效手段。 图 4 BNT-BT 陶瓷介电温谱(a)和力学图谱(b) [29] Fig. 4 Dielectric spectra (a) and dynamic mechanical properties (b) of BNT-BT ceramic [29] 3 DMA 在铁电材料弛豫特征研究方面 的应用 通常, 铁电体的弛豫特征通过介电常数随温度 变化的频率色散来表征, 并且频率越低弛豫特征越 明显, 然而测量介电要求精确的夹持和屏蔽, 难以 实现低频下的测量。DMA 则弥补了测试介电低频 图 5 PbZrO 3 单晶对不同方向外力的弹性反应 [31] Fig. 5 The elastic response to different external stress of PbZrO 3 single crystal [31] 第 8 期 陈 云, 等: 动态热机械分析仪(DMA)在铁电压电材料研究中的应用 861 的不足, 甚至能实现超低频测试(低至 0.001 Hz)。 Puchberger 等 [31] 研究了 [31] 小对 R1 弛豫峰的峰值有影响, 其中升温速率越慢 加载越大, R1 弛豫峰的峰值越大。Bourim [34] 指出, [35] Fig.…”
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“…In PbZrO 3 the phase transition takes place at T c ~ 509 K and results in a change from a paraelectric phase with cubic symmetry to an orthorhombic antiferroelectric Pbam phase 6 . A typical domain structure of PbZrO 3 at room temperature is shown in Fig.1.…”
mentioning
confidence: 99%