2-DIMENSIONAL MAGNETIC ORDER IN PB2SR2TBCU3O8

NCU Institutional Repository > 理學院 > 物理研究所 > 期刊論文 > Item 987654321/39265

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/987654321/39265

题名:	2-DIMENSIONAL MAGNETIC ORDER IN PB2SR2TBCU3O8
作者:	WU,SY;HSIEH,WT;LI,WH;LEE,KC;LYNN,JW;YANG,HD
贡献者:	物理研究所
关键词:	ERBA2CU3O7;IONS;ER;DY
日期:	1994
上传时间:	2010-07-08 14:10:14 (UTC+8)
出版者:	中央大學
摘要:	Neutron diffraction techniques have been used to investigate the magnetic ordering of the Tb ions in polycrystalline Pb2Sr2TbCu3O8. Significant magnetic correlations are found to develop below approximately 10 K, and these correlations are two dimensional in nature, representative of the strongly anisotropic magnetic interactions in these layered materials. The correlation length increases with decreasing temperature, and long-range order is observed to develop at T(N) almost-equal-to 5.5 K. However, the sawtooth Bragg profile for the scattering demonstrates that the long-range order is two dimensional, rather than three dimensional, with a spin configuration where nearest-neighbor spins are antiparallel The scattering profile can be explained quantitatively by assuming long-range order within the ab plane, with no significant correlations along the c axis to the lowest temperatures measured (1.36 K). Our results suggest that the system is well described by a two-dimensional Ising model. The only other (pure) system where a crossover to three-dimensional behavior is not observed is DyBa2Cu4O8.
關聯:	JOURNAL OF APPLIED PHYSICS
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	590	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