Carbon diffusion and reactivity in Mn5Ge3 thin films

被引：3

作者：

Petit, Matthieu ^{[1
,2
]}

Dau, Minh Tuan ^{[1
,2
]}

Monier, Guillaume ^{[3
,4
]}

Michez, Lisa ^{[1
,2
]}

Barre, Xavier ^{[1
,2
]}

Spiesser, Aurelie ^{[1
,2
]}

Le Thanh, Vinh ^{[1
,2
]}

Glachant, Alain ^{[1
,2
]}

Coudreau, Cyril ^{[1
,2
]}

Bideux, Luc ^{[3
,4
]}

Robert-Goumet, Christine ^{[3
,4
]}

机构：

[1] CINaM CNRS UPR3118, Campus Luminy Case 913, F-13288 Marseille 9, France

[2] Univ Aix Marseille 1, F-13288 Marseille, France

[3] Univ Clermont Ferrand 2, uniblapas, F-63000 Clermont Ferrand, France

[4] LASMEA, CNRS, UMR 6602, F-63177 Clermont Ferrand, France

来源：

PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 9, NO 6 | 2012年 / 9卷 / 06期

关键词：

Mn5Ge3; carbon; diffusion; interstitial; XPS; AES; FERROMAGNETIC MN5GE3; TEMPERATURE; GE(111);

D O I：

10.1002/pssc.201100448

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The Curie temperature of Mn5Ge3 has been successfully enhanced by carbon doping. In this context the diffusion of a carbon thin film in Mn5Ge3 has been studied at room temperature. A value of the diffusivity of about D = 2.4x10(-23) +/- 0.5x10(-23) m(2) s(-1) is reported. This value is in the typical range of interstitial diffusion coefficients. Moreover Auger Ge and Mn peaks shifts and Ge-3d core level have been investigated to get some details on the reactivity of carbon atoms in Mn5Ge3. Mn Auger transitions display a shift of 4 eV whereas Ge transitions do not. Similarly Ge-3d core level does not contain C related contribution but presents a Mn one. These observations confirmed the fact that carbon atoms are not inert species for Mn. It suggests that a ternary GeMn-C alloy could occur and should be taken into account when doping the Mn5Ge3 with carbon.

引用

页码：1374 / 1377

页数：4

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