Au and Fe magnetic moments in disordered Au-Fe alloys

被引：26

作者：

Wilhelm, F. ^{[2
]}

Poulopoulos, P. ^{[1
]}

Kapaklis, V. ^{[1
,3
]}

Kappler, J. -P. ^{[4
]}

Jaouen, N. ^{[2
]}

Rogalev, A. ^{[2
]}

Yaresko, A. N. ^{[5
]}

Politis, C. ^{[3
,6
]}

机构：

[1] Univ Patras, Dept Mat Sci, Patras 26504, Greece

[2] European Synchrotron Radiat Facil, F-38043 Grenoble, France

[3] Univ Patras, Dept Engn Sci, Sch Engn, Patras 26504, Greece

[4] IPCMS, F-67037 Strasbourg, France

[5] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany

[6] Forschungszentrum Karlsruhe, Inst Nanotechnol, D-76021 Karlsruhe, Germany

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.77.224414

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on the magnetic moments of Au and Fe in fcc and bcc disordered Au-Fe alloys determined via a combination of x-ray magnetic circular dichroic measurements at the L-3,L-2 edges of Au and superconducting quantum interference device magnetometry. The 5d induced magnetic moment of Au in the fcc alloys scales with the number N of nearest Fe neighbors, from M-Au=0.1 mu(B)/atom for N=3 to M-Au=0.2 mu(B)/atom for N=6. Fe in these alloys is in a high-spin state, which carries a total magnetic moment of about 3 mu(B)/atom. The maximum value of 5d induced magnetic moment of Au is 0.33 mu(B)/atom and is exhibited when Au is placed as an impurity in a bcc Fe environment. The ratio of the orbital-to-spin 5d magnetic moment of Au is M-L/M-S approximate to 0.2 in all samples. The experimental results are discussed with respect to first principles calculations.

引用

页数：6

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