Magnetic excitations in NpBi

被引：5

作者：

Bourdarot, F

Bossy, J

Burlet, P

Fak, B

Monachesi, P

Rebizant, J

Regnault, LP

Spirlet, JC

Vogt, O

机构：

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

[2] UNIV AQUILA,DIPARTIMENTO FIS,I-67010 LAQUILA,ITALY

[3] JRC,EUROPEAN COMMISS,EUROPEAN INST TRANSURANIUM ELEMENTS,D-76125 KARLSRUHE,GERMANY

[4] ETH,CH-8093 ZURICH,SWITZERLAND

来源：

PHYSICAL REVIEW B | 1997年 / 56卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.56.14029

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report inelastic neutron-scattering measurements on a single crystal of NpBi. The magnetic excitation spectrum consists of two branches with longitudinal and transverse polarization, respectively. The excitations are interpreted as spin waves in an antiferromagnetic triple-k type-I structure. With increasing temperature, the anisotropy gap decreases monotonously and disappears at T-N. As the ordered magnetic moment in NpBi has the free-ion Np3+ moment value, the anisotropy gap cannot originate from crystal-electric-field interactions, and the triple-k structure of NpBi is anticipated to be stabilized by two-ion quadrupolar terms.

引用

页码：14029 / 14035

页数：7

共 16 条

[1] MULTIAXIAL ANTIFERROMAGNETIC STRUCTURES AND QUADRUPOLAR INTERACTIONS [J].