DEPENDENCE OF POWDER NEUTRON-SCATTERING ON THE DIMENSIONALITY OF MAGNETIC ORDER

NCU Institutional Repository > 理學院 > 物理研究所 > 期刊論文 > Item 987654321/39221

jsp.display-item.identifier=請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/39221

题名:	DEPENDENCE OF POWDER NEUTRON-SCATTERING ON THE DIMENSIONALITY OF MAGNETIC ORDER
作者:	LI,WH;HSIEH,WT;LEE,KC
贡献者:	物理研究所
关键词:	SUPERCONDUCTIVITY;ERBA2CU3O7;GRAPHITE;HEAT;IONS;PR
日期:	1995
上传时间:	2010-07-08 14:08:46 (UTC+8)
出版者:	中央大學
摘要:	The peak profiles of coherent scattering obtained in powder diffraction experiments that reflect the dimensionality of the ordered system are discussed. The well known expression that generates the powder diffraction pattern of a two-dimensionally ordered system is generalized to include couplings along the third dimension. Attention is concentrated on the magnetic systems, and the interactions between the adjacent layers are allowed to be either ferromagnetic or antiferromagnetic. A two-dimensionally ordered system gives Bragg peaks with characteristic sawtooth profiles at the {hk} positions. As the correlations between the ordered layers develop, new Bragg peaks at the {khl} positions appear and their widths are closely related to the correlation length along the third axis. A finite correlation length gives a width which is broader than the instrumental resolution, and its intrinsic width is inversely proportional to the correlation length. In the limit for long-range correlation along the third axis, symmetric peaks with their widths consistent with the instrumental resolution are then obtained. Neutron magnetic diffraction patterns taken at low temperatures on various high-T-c oxides are used as examples to illustrate the expression obtained.
關聯:	JOURNAL OF PHYSICS-CONDENSED MATTER
显示于类别:	[物理研究所] 期刊論文

文件中的档案:

档案	描述	大小	格式	浏览次数
index.html		0Kb	HTML	407	检视/开启

在NCUIR中所有的数据项都受到原著作权保护.

社群 sharing

数据加载中.....