SPIN-WAVE DISPERSION RELATIONS IN FERROMAGNETIC FE-SI ALLOYS

被引：16

作者：

ANTONINI, B

MENZINGER, F

PAOLETTI, A

TUCCIARONE, A

机构：

[1] Laboratorio di Fisica Nucleare Applicata, Centro di Studi Nucleari della Casaccia, Comitato Nazionale per l'Energia Nucleare, Rome

来源：

PHYSICAL REVIEW | 1969年 / 178卷 / 02期

关键词：

D O I：

10.1103/PhysRev.178.833

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Spin-wave dispersion relations, in the momentum range 0.1q0.3 -1, have been measured in Fe0.93Si0.07 and Fe0.85Si0.15 ferromagnetic alloys by means of the so-called diffraction method in conjunction with polarized neutrons. By fitting the experimental points with the law =Dq2(1-q2+q4), the stiffness constant D has been found to be 2733 and 23311 meV 2, respectively, for the two alloys. Values of 3.70.2 and 42 2 were obtained for the parameter. These values of as well as the concentration dependence of the stiffness constants, appear to be inconsistent with a nearest-neighbor Heisenberg model. © 1969 The American Physical Society.

引用

页码：833 / +

页数：1

共 19 条

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