Size effects on the phase coexistence in MnAs/GaAs(001) ribbons

被引：5

作者：

Tortarolo, M. ^{[1
]}

Sirena, M. ^{[1
,2
]}

Milano, J. ^{[1
,2
,3
]}

Steren, L. B. ^{[2
,4
]}

Vidal, F. ^{[3
]}

Salles, B. Rache ^{[3
]}

Etgens, V. H. ^{[3
]}

Eddrief, M. ^{[3
]}

Faini, G. ^{[5
]}

Pietrasanta, L. I. ^{[2
,6
]}

机构：

[1] CNEA, Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Argentina

[2] Consejo Nacl Invest Cient & Tecn, Buenos Aires, DF, Argentina

[3] UPMC, CNRS, UMR 7588, Inst NanoSci Paris, F-75015 Paris, France

[4] CNEA, Ctr Atom Constituyentes, RA-1650 San Martin, Argentina

[5] CNRS, Phynano Team, Lab Photon & Nanostruct, F-91960 Marcoussis, France

[6] Univ Buenos Aires, Fac Ciencias Exactas & Nat, Ctr Microscopias Avanzadas, Buenos Aires, DF, Argentina

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 22期

关键词：

PERIODIC ELASTIC DOMAINS; EPITAXIAL MNAS FILMS; MAGNETIC-PROPERTIES; STRAIN; TRANSITION; GAAS(001); SCALE; GAAS;

D O I：

10.1103/PhysRevB.81.224406

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Size and orientation effects on the phase coexistence in MnAs/GaAs(001) microribbons were studied using magnetic force microscopy. The magnetostructural phase coexistence reported in MnAs thin films is also observed in the microribbons, even in the smallest ones. However, the stripe array of MnAs films is only preserved in the ribbons confined along the [0001] direction. Nevertheless, the configuration of the magnetoelastic domains is altered in the ribbons confined along the [11 (2) over bar0] direction. In this last case, the micrometric ribbons exhibit a redistribution of the magnetoelastic phases owed to the relaxation of the epitaxial strains. The results are understood in terms of the anisotropic change in the lattice parameters at the magnetostructural transition.

引用

页数：5

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