INVESTIGATION OF SPIN-WAVES IN SINGLE-CRYSTAL BI2CUO4 BY INELASTIC NEUTRON-SCATTERING

被引：10

作者：

FURRER, A ^{[1
]}

FISHER, P ^{[1
]}

ROESSLI, B ^{[1
]}

PETRAKOVSKII, G ^{[1
]}

SABLINA, K ^{[1
]}

VALKOV, V ^{[1
]}

FEDOSEEV, B ^{[1
]}

机构：

[1] LV KIRENSKY PHYS INST,KRASNOYARSK 660036,USSR

来源：

SOLID STATE COMMUNICATIONS | 1992年 / 82卷 / 06期

关键词：

D O I：

10.1016/0038-1098(92)90746-V

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Neutron scattering experiments have been employed to study the spin-wave excitations and the critical behaviour of sublattice magnetization of a single crystal Bi2CuO4. Dispersion law for spin waves along the tetragonal axis of crystal is determined. There were found two branches of spin waves which are characterized by the energy gaps DELTA-1 congruent-to 1.7 meV and DELTA-2 congruent-to 4.0 meV, respectively. The value of critical exponent beta = 0.36 + 0.08 reflects the 3D character of the magnetic ordering in Bi2CuO4. Observed two spin-wave branches are described on the basis of the anisotropic tetragonal spin-Hamiltonian with four-sites exchange interaction.

引用

页码：443 / 446

页数：4

共 9 条

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