Modulated phases in multi-stage structural transformations -: art. no. 134113

被引：20

作者：

Castán, T

Planes, A

Saxena, A

机构：

[1] Univ Barcelona, Dept Estructura & Constituents Mat, E-08028 Barcelona, Spain

[2] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA

来源：

PHYSICAL REVIEW B | 2003年 / 67卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.67.134113

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

For multistage displacive structural transitions we present a general framework that accounts for various intermediate modulated phases, elastic constant, phonon, and related thermodynamic anomalies. Based on the presence or absence of modulated phases we classify these transformations in four categories and apply this approach to four different representative materials Ni-Mn-Ga (or alpha-U), NiTi(Fe), Ni-Al, and Cu-Zn-Al. We suggest that the anomalous increase in elastic constants and phonon frequency observed when approaching the martensitic transition from above is a signature of the commensurate modulated phase.

引用

页数：6

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