Singlet state formation and its impact on magnetic structure in tetramer system SeCuO${}_3$

Abstract

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 $\text{k}=\left(0,0,1\right)$. The order parameter follows a critical behavior near $T_N=8$ K, with a critical exponent $\beta =0.32$ 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, $m_{Cu1}\approx 0.4{\mu }_B$ and $m_{Cu2}\approx 0.7{\mu }_B$ at 1.5 K.

References in corpus (4)

• $\mu$SR evidence for the U(1) quantum spin liquid ground state in the triangular antiferromagnet YbMgGaO${}_4$
• Spin Configuration in the 1/3 Magnetization Plateau of Azurite Determined by NMR
• Magnetism of the antiferromagnetic spin-$\frac{1}{2}$ tetramer compound CuInVO${}_5$
• Magnetic anisotropy of spin tetramer system SeCuO${}_3$ studied by torque magnetometry and ESR spectroscopy

Cited by in corpus (2)

• Site-Specific Spin Reorientation in Antiferromagnetic State of Quantum System SeCuO${}_3$
• Triplons, Magnons, and Spinons in a Single Quantum Spin System: SeCuO3