Neutron Diffraction Study on Single-crystalline UAu${}_2$Si${}_2$

Abstract

Magnetic structure of tetragonal UAu${}_2$Si${}_2$ was investigated by single-crystal neutron diffraction experiments. Below $T_{\mathrm{N}}$ = 20 K it orders antiferromagnetically with a propagation vector of $k=(2/3,0,0)$ and magnetic moments of uranium ions pointing along the tetragonal $c$-axis. Weak signs of the presence of a ferromagnetic component of magnetic moment were traced out.Taking into account a group theory calculation and experimental results of magnetization and ${}^{29}$Si-NMR, the magnetic structure is determined to be a squared-up antiferromagnetic structure, with a stacking sequence ($++-$) of the ferromagnetic $ac$-plane sheets along the $a$-axis. This result highlights similar magnetic correlations in UAu${}_2$Si${}_2$ and isostructural URu${}_2$Si${}_2$.

arXiv comment7 pages, 7 figures

References in corpus (10)

• A Hierarchically-Organized Phase Diagram near a Quantum Critical Point in URu2Si2
• High Field Studies of the Hidden Order Transition in URu${}_2$Si${}_2$
• Hidden Order Behaviour in URu2Si2 (A Critical Review of the Status of Hidden Order in 2014)
• Field-induced spin-density wave beyond hidden order in URu2Si2
• Hybridization-Driven Orthorhombic Lattice Instability in URu2Si2
• Electronic structure of ThRu2Si2 studied by angle-resolved photoelectron spectroscopy: Elucidating the contribution of U 5f states in URu2Si2
• Peculiar Magnetism of UAu${}_2$Si${}_2$
• Mean-field phase diagrams of $A{T}_2{X}_2$ compounds
• Spin liquid versus long range magnetic order in the frustrated body-centered tetragonal lattice
• Spin liquid versus long range magnetic order in the frustrated body-centered tetragonal lattice

Cited by in corpus (3)

• Crystallographic and magnetic structure of UNi${}_4$${}^{11}$B
• Magnetoelastic phenomena in antiferromagnetic uranium intermetallics: the $\mathrm{UA}{\mathrm{u}}_2\mathrm{S}{\mathrm{i}}_2$ case
• Uncompensated Antiferromagnetic Ordering of UAu${}_2$Si${}_2$ Studied by ${}^{29}$Si-NMR