Evidence for strain glass in the ferroelastic-martensitic system Ti50-xNi50+x -: art. no. 205702
Evidence for strain glass in the ferroelastic-martensitic system Ti50-xNi50+x -: art. no. 205702
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DOI：
10.1103/physrevlett.95.205702
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发表时间：
2005-11-11
影响因子：
8.6
通讯作者：
Otsuka, K
中科院分区：
文献类型：
--
作者：
Sarkar, S;Ren, XB;Otsuka, K
本文报道了富Ni金属间化合物Ti_（50-x）Ni_（50 +x）（x > 1）铁弹-马氏体系统中的一种新的玻璃化现象--“应变玻璃”，即在低于临界温度T_g时，局部应变被冻结在无序结构中。交流弹性模量在T-g处出现最小值，表现出对数频率依赖性，遵循Vogel-Fulcher关系，相应的内耗在较低温度处出现频率依赖性峰值。原位高分辨率透射电子显微镜观察显示不相关的martensiticlike相的纳米团簇，随机冻结在其他未转化的parentlike矩阵。应变玻璃与自旋玻璃和弛豫子平行，可能会对玻璃的基本物理产生新的影响，并导致新的性质的发现。
We report here "strain glass," a new glassy phenomenon in ferroelastic-martensitic system of Ni-rich intermetallic Ti50-xNi50+x (x > 1), where local strain is frozen in disordered configuration below a critical temperature T-g. The ac elastic modulus shows a minimum at T-g, which exhibits logarithmic frequency dependence following Vogel-Fulcher relationship, and the corresponding internal friction shows a frequency-dependent peak located at a lower temperature. In situ high-resolution transmission electron microscopy observations reveal uncorrelated nanoclusters of martensiticlike phase, randomly frozen in the otherwise untransformed parentlike matrix. Being parallel to spin glass and relaxor, strain glass may shed new light on the fundamental physics of glass and lead to the discovery of novel properties.