Quadrupolar, structural, and magnetic ordering inDyB2C2studied by symmetry analysis and neutron diffraction
Quadrupolar, structural, and magnetic ordering inDyB2C2studied by symmetry analysis and neutron diffraction
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通过对称分析和中子衍射研究 DyB2C2 的四极、结构和磁序
DOI：
10.1103/physrevb.69.224417
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发表时间：
2004
影响因子：
3.7
通讯作者：
T. Nakamura
中科院分区：
文献类型：
--
作者：
O. Zaharko;W. Sikora;F. Bialas;U. Staub;T. Nakamura
用理论对称性分析和中子单晶衍射实验研究了沿[100]方向外加磁场为0~4T时的反铁四极(AFQ)和反铁磁(AFM)有序。新的对称性论证表明，下面的afq有序伴随着涉及硼和碳原子的结构扭曲，但不包括镝离子。在AFQ相中，基于长程四极有序的对称性分析、场感生偶极磁结构的中子衍射研究以及其他现有的观测结果，提出了一种新的四极排列。这是相邻原子的四极在平面内和沿平面的排列。对于零场原子力显微镜相，中子单晶衍射数据的修正与山内提出的模型不符[J.Phys.SoC。日本。68,2057(1999)](模型A)以及van Duijn、Attfield和Suzuki[Phys.B 62,6410(2000)](模型B)允许优先考虑修正的模型A。四个Dy亚晶格的磁矩相等，并且被限制在平面内。Dy矩在AXIS ISAT(0 0 0)和(12 12 0)站点的倾斜.最初提出的沿和Notas方向相邻的Dy矩之间的夹角。
Antiferroquadrupolar (AFQ) and antiferromagnetic (AFM) order inhave been investigated by theoretical symmetry analysis and neutron single crystal diffraction experiment with 0 to 4 T applied magnetic field along [100]. New symmetry arguments indicate that the AFQ ordering belowis accompanied by structural distortions involving boron and carbon atoms, but not dysprosium ions. In the AFQ phase a new arrangement of quadrupoles is proposed based on symmetry analysis of the long-range quadrupolar ordering, neutron diffraction study of the field-induced dipolar magnetic structure, and other available observations. This is aarrangement of quadrupoles of neighboring atoms in theplane, and along. For the zero-field AFM phase, the refinement of neutron single crystal diffraction data ofagainst models proposed by Yamauchi [J. Phys. Soc. Jpn. 68, 2057 (1999)] (model A) and by van Duijn, Attfield, and Suzuki [Phys. Rev. B 62, 6410 (2000)] (model B) allows to give preference to modified model A. The magnetic moments of the four Dy sublattices are equal and are confined in theplane. The tilt of the Dy moments from theaxis isat (0 0 0) andat the ( 12 12 0) site. The angle between the Dy moments adjacent alongisand notas proposed originally.
DyB_2C_2 中的四极和十六极排序：通过共振 X 射线衍射直接观察
DOI：
--
发表时间：
2004
期刊：
Phys. Rev. B 69・2
影响因子：
--
作者：
Y.Tanaka;14 co-authors
通讯作者：
14 co-authors
反铁四极有序化合物 DyB_2C_2 的磁相图
DOI：
--
发表时间：
2004
期刊：
J.Phys.Soc.Jpn. 73
影响因子：
--
作者：
K.Indoh;K.Ohoyama
通讯作者：
K.Ohoyama