Heterogeneous Dynamics of Prototypical Ionic Glass CKN Monitored by Physical Aging
Heterogeneous Dynamics of Prototypical Ionic Glass CKN Monitored by Physical Aging
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DOI：
10.1103/physrevlett.110.015702
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发表时间：
2013-01-03
影响因子：
8.6
通讯作者：
Hensel-Bielowka, S.
中科院分区：
文献类型：
--
作者：
Paluch, M.;Wojnarowska, Z.;Hensel-Bielowka, S.
在这篇论文中，我们研究了典型离子玻璃原体[Ca(NO3)(2)](0.4) [KNO3](0.6) （CKN）在物理老化过程中电导率弛豫过程的时间演化。结果表明，当样品在玻璃化转变温度以下退火时，电导率弛豫峰高频翼的斜率增加，表明了分子动力学的非均质性。这一发现在其他离子玻璃形成物中也得到证实。此外，我们还分析了玻璃态CKN中离子电导率变化的动力学，以探测其结构弛豫。DOI: 10.1103 / PhysRevLett.110.015702
In this Letter, we investigate the time evolution of the conductivity relaxation process in a prototypical ionic glass former, [Ca(NO3)(2)](0.4) [KNO3](0.6) (CKN), undergoing physical aging. It is demonstrated that the heterogeneous nature of molecular dynamics is manifested by an increase in the slope of the high frequency wing of the conductivity relaxation peak as the sample is annealed below the glass transition temperature. This finding is also confirmed for other ionic glass formers. Additionally, we analyze the kinetics of the change in the ionic conductivity in glassy CKN to probe its structural relaxation. DOI: 10.1103/PhysRevLett.110.015702