INELASTIC NEUTRON-SCATTERING MEASUREMENTS ON INCOMMENSURATE ANTI-FERROMAGNETIC CHROMIUM

被引：7

作者：

ZIEBECK, KRA ^{[1
]}

BOOTH, JG ^{[1
]}

机构：

[1] UNIV SALFORD,DEPT PURE & APPL PHYS,SALFORD M5 4WT,LANCASHIRE,ENGLAND

来源：

JOURNAL OF PHYSICS F-METAL PHYSICS | 1979年 / 9卷 / 12期

关键词：

D O I：

10.1088/0305-4608/9/12/015

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Inelastic coherent neutron scattering experiments on a single crystal of unalloyed chromium at 295K have been performed in the neighbourhood of the (100) reciprocal lattice point using the IN1 triple-axis spectrometer of ILL, Grenoble. The results obtained from constant energy scans at energy transfers up to 18 THz suggest that a band gap of approximately 6.5 THz ( approximately 26.9 meV) exists for the incommensurate spin density wave state. This is in agreement with static susceptibility measurements but at variance with light scattering results. In addition the excitations are characterised by the appearance of a broad peak centred on the (100) position rather than by linear dispersion from the adjacent satellite positions. This is not predicted by any of the current theories.

引用

页码：2423 / 2430

页数：8

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