MAGNETIC EXCITATIONS IN THE ITINERANT ANTIFERROMAGNET MN90CU10

被引：9

作者：

FERNANDEZBACA, JA

HAGEN, ME

NICKLOW, RM

TSUNODA, Y

HAYDEN, SM

机构：

[1] UNIV KEELE, KEELE ST5 5BG, STAFFS, ENGLAND

[2] OSAKA UNIV, OSAKA, JAPAN

[3] INST MAX VON LAUE PAUL LANGEVIN, F-38042 GRENOBLE, FRANCE

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1992年 / 104卷 / pt 1期

关键词：

D O I：

10.1016/0304-8853(92)90991-V

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have performed a neutron scattering experiment in order to study the spin dynamics of the itinerant-electron-antiferromagnet Mn90Cu10 at room temperature. Strongly-damped spin waves of energies up to 68 meV have been observed. These excitations have been found to be consistent with a linear dispersion relation with a stiffness constant of about 251 meV angstrom and an energy gap of 7.5 meV. The spin-wave damping is consistent with theoretical calculations that predict a damping linear in the wavevector q. These results are consistent with recent measurements by Nicklow and Tsunoda, and qualitatively consistent with earlier measurements by Wiltshire and collaborators.

引用

页码：699 / 700

页数：2