An Enhanced Methodology for Antiferromagnetic Structure and Form-factor Determinations
作者:
J.S. Plant,
期刊:
Crystallography Reviews
(Taylor Available online 1991)
卷期:
Volume 2,
issue 4
页码: 205-233
ISSN:0889-311X
年代: 1991
DOI:10.1080/08893119108032958
出版商: Taylor & Francis Group
关键词: Antiferromagnetic configuration;antiferromagnetic domains;form-factors;magnetic structure;neutron diffraction;neutron polarisation analysis
数据来源: Taylor
摘要:
It seems that it might be due to a combination of practical and historical circumstances that the unpolarised neutron diffraction method, applied usually to powder samples, still dominates structure determinations of antiferromagnets. Polarised-beam methods are used for ferromagnets. There is also a more advanced polarised-neutron single-crystal method for antiferromagnets, which is at last beginning to emerge, and this paper outlines the conceptual changes that are involved in adapting to this little-known revision of methodology, for multidomain antiferromagnetic structures. Further analyses are presented of initialUND-FFI-NPA(A)results, for atP3z antiferromagnett1, AuMn for example, and the discussion is extended to the possibilities for further study, such as with a differentUND-FFI-NPA(D)experimental arrangement. By introducing additional techniques to determine the moment directions in individual coherent domains, the studies can proceed to more rigorous and detailed investigations of the form-factors in antiferromagnets of various symmetries. Some appropriate form-factor expressions are presented.
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