Full Tunability of Strain along the fcc-bcc Bain Path in Epitaxial Films and Consequences for Magnetic Properties

被引：75

作者：

Buschbeck, J. ^{[1
,2
]}

Opahle, I. ^{[1
,3
]}

Richter, M. ^{[1
]}

Roessler, U. K. ^{[1
]}

Klaer, P. ^{[4
]}

Kallmayer, M. ^{[4
]}

Elmers, H. J. ^{[4
]}

Jakob, G. ^{[4
]}

Schultz, L. ^{[1
,2
]}

Faehler, S. ^{[1
]}

机构：

[1] IFW Dresden, D-01171 Dresden, Germany

[2] Tech Univ Dresden, Inst Mat Sci, Dept Mech Engn, D-01062 Dresden, Germany

[3] Goethe Univ Frankfurt, Inst Theoret Phys, D-60438 Frankfurt, Germany

[4] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 21期

关键词：

FePd; Fe-Pd; TRANSFORMATION; ANISOTROPY; IRON; GAMMA; INVAR; PHASE;

D O I：

10.1103/PhysRevLett.103.216101

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Strained coherent film growth is commonly either limited to ultrathin films or low strains. Here, we present an approach to achieve high strains in thicker films, by using materials with inherent structural instabilities. As an example, 50 nm thick epitaxial films of the Fe70Pd30 magnetic shape memory alloy are examined. Strained coherent growth on various substrates allows us to adjust the tetragonal distortion from c/a(bct)=1.09 to 1.39, covering most of the Bain transformation path from fcc to bcc crystal structure. Magnetometry and x-ray circular dichroism measurements show that the Curie temperature, orbital magnetic moment, and magnetocrystalline anisotropy change over broad ranges.

引用

页数：4

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