EVIDENCE FOR THE EXCHANGE ORIGIN OF THE MAGNON GAP IN THE GARNET CA3FE2GE3O12

被引：13

作者：

BRUCKEL, T ^{[1
]}

DORNER, B ^{[1
]}

GUKASOV, A ^{[1
]}

PLAKHTY, V ^{[1
]}

机构：

[1] PETERSBURG NUCL PHYS INST,ST PETERSBURG 188350,USSR

来源：

PHYSICS LETTERS A | 1992年 / 162卷 / 04期

关键词：

D O I：

10.1016/0375-9601(92)90031-G

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The two acoustic magnon branches exhibit each an energy gap at the Brillouin zone center. The higher one is predicted to arise from a coupling of the antiferromagnetic subsystems due to the zero-point spin fluctuations. The temperature dependence of the gap frequency supports this hypothesis.

引用

页码：357 / 358

页数：2

共 11 条

[1]

BELOV KP, 1974, JETP LETT+, V20, P42

[2]

BRUCKEL T, 1986, SOLID STATE COMMUN, V59, P29, DOI 10.1016/S0038-1098(86)80007-2

[3] DYNAMICAL SUBLATTICE INTERACTION IN THE ANTIFERROMAGNETIC GARNET FE2CA3(GEO4)3 AS STUDIED BY NEUTRON-SCATTERING [J].