Temperature driven reversible breakdown of pseudomorphism in ultrathin Fe/Cu3Au films -: art. no. 106103

被引：4

作者：

Bisio, F

Terreni, S

Gonella, G

Floreano, L

Morgante, A

Canepa, M

Mattera, L

机构：

[1] Univ Genoa, Unita INFM, I-16146 Genoa, Italy

[2] Univ Genoa, CNR IMEM, Dipartimento Fis, I-16146 Genoa, Italy

[3] Ist Nazl Fis Mat, Lab TASC, Trieste, Italy

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.93.106103

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We observe that ultrathin Fe/Cu3Au(001) films in the 6-13 Angstrom thickness range, beyond the thickness of pseudomorphism breakdown at room temperature, exhibit a temperature dependent structural phase transition in the range T(c)approximate to345-380 K. In the high temperature state the Fe film becomes pseudomorphic, while breakdown of pseudomorphism reversibly occurs as the system is cooled below the transition temperature. The difference between substrate and overlayer thermal expansion coefficient is highlighted as the driving force for the observed transition.

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页码：106103 / 1

页数：4

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