四聚体SeCuO $_3$中单重态的形成及其对磁结构的影响
Singlet state formation and its impact on magnetic structure in tetramer system SeCuO$_3$
摘要：
本文利用中子衍射和核磁共振技术对四聚体SeCuO $_3$的磁结构进行了实验研究。我们建立了一个非共线的，相称的反铁磁有序的传播矢量$\textbf{k} = \left(0,0,1 \right)$。序参量在$T_N = 8$ K附近遵循临界行为，临界指数$β= 0.32$与3D普适类一致。有证据表明，单重态开始形成的四聚体在温度高达200 K，其签名被保存在有序的状态，通过一个强大的重整化的有序磁矩在两个非等效的铜网站，$m_{Cu1} \approx 0.4 μ_B$和$m_{Cu2} \approx 0.7 μ_B$在1.5 K。
英文摘要：
We present an experimental investigation of the magnetic structure in a tetramer system SeCuO$_3$ using neutron diffraction and nuclear resonance techniques. We establish a non-collinear, commensurate antiferromagnetic ordering with a propagation vector $\textbf{k} = \left(0,0,1 \right)$. The order parameter follows a critical behavior near $T_N = 8$ K, with a critical exponent $β= 0.32$ in agreement with a 3D universality class. Evidence is presented that a singlet state starts to form on tetramers at temperatures as high as 200 K, and its signature is preserved within the ordered state through a strong renormalization of the ordered magnetic moment on two non-equivalent copper sites, $m_{Cu1} \approx 0.4 μ_B$ and $m_{Cu2} \approx 0.7 μ_B$ at 1.5 K.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
