Polarized-Neutron Study of NiS2
Polarized-Neutron Study of NiS2
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DOI：
10.1143/jpsj.45.444
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发表时间：
1978-08
影响因子：
1.7
通讯作者：
K. Kikuchi;T. Miyadai;H. Itoh;T. Fukui
中科院分区：
文献类型：
--
作者：
K. Kikuchi;T. Miyadai;H. Itoh;T. Fukui
本文对NiS2无孪晶单晶在0.5K时的（200）M1反射进行了偏振分析。最终的偏振（P f）被测量为关于散射矢量的旋转角（θ）的函数。（P f近似表示为-0.95 cos 2 π。）反铁磁结构相对于第一类有序的假设下，确定了一个特定的域分布是没有实现在样品中。证实了先前提出的非共线结构。通过测量（400）核反射的翻转比，在形成黄铁矿结构的每个镍离子上观察到大于0.01（μ B）的弱铁磁矩。弱铁磁性的机制进行了讨论。
The polarization analysis for the (200)M1 reflection has been made on a twin free single crystal of NiS 2 at ∼5 K. The final polarization ( P f ) was measured as a function of the rotating angle (ϕ) about the scattering vector. ( P f is approximately expressed by -0.95 cos 2ϕ.) The antiferromagnetic structure with respect to the first kind ordering was determined under the assumption that a particular domain distribution is not realized in the sample. The previously proposed non-collinear structure was confirmed. A weakferromagnetic moment more than 0.01 (µ B ) was observed on each nickel ion forming the pyrite structure by measuring the flipping ratio of the (400) nuclear reflection. Mechanisms for weakferromagnetism are discussed.