Magnetic interactions in amorphous Fe-Sc alloys

被引：1

作者：

Ghafari, M ^{[1
]}

Stahl, B ^{[1
]}

Banihashemi, SH ^{[1
]}

Müller, M ^{[1
]}

Hahn, H ^{[1
]}

机构：

[1] Tech Univ Darmstadt, D-64287 Darmstadt, Germany

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2001年 / 226卷 / PART II期

关键词：

magnetic coupling; amorphous systems-spin glasses; amorphous systems-antiferromagnetic; magnetic clusters;

D O I：

10.1016/S0304-8853(00)00753-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Results of Fe-57 Mbssbauer spectroscopy, AC and DC susceptibility, grazing incidence X-ray diffraction and Rutherford-backscattering measurements on the amorphous alloys Fe100-xScx(8 less than or equal tox less than or equal to 70) give for the first time, convincing evidence for the antiferromagnetic exchange coupling between Fe moments at low Sc concentrations. This antiferromagnetic coupling for 8 less than or equal tox less than or equal to 20 is limited to certain regions (magnetic clusters) of the sample. The nature of the coupling is of the Heisenberg type. For x>43, the positive magnetic coupling between the Fe moments is across Sc atoms. The ferromagnetic coupling between Fe atoms can be explained by the superexchange. Sc moments couple antiferromagnetically to the Fe nearest neighbors. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：1555 / 1557

页数：3