Magnetic order and low-energy excitations in the quasi-one-dimensional antiferromagnet CuSe2O5with staggered fields

Abstract

Ground-state and low-energy excitations of the quasi-one-dimensional antiferromagnet CuSe${}_{2}$O${}_{5}$ where finite interchain interactions promote long-range antiferromagnetic order below ${T}_{N}=17$ K, were experimentally studied using bulk magnetization, neutron diffraction, muon spin relaxation, and antiferromagnetic resonance measurements. The derived spin-canted structure is characterized by the magnetic propagation vector $\mathbf{k}=(1,0,0)$ and the reduced magnetic moment $\mathbit{m}=[0.13(7),0.50(1),0.00(8)]{\ensuremath{\mu}}_{B}$. The values of the magnetic anisotropies determined from the field and angular dependencies of the antiferromagnetic resonance comply well with a previous electron paramagnetic resonance study and correctly account for the observed magnetic ground state and spin-flop transition.