Magnetic order and low-energy excitations in the quasi-one-dimensional antiferromagnet CuSe${}_2$O${}_5$ with staggered fields

Abstract

Ground state and low-energy excitations of the quasi-one-dimensional antiferromagnet CuSe${}_2$O${}_5$ were experimentally studied using bulk magnetization, neutron diffraction, muon spin relaxation and antiferromagnetic resonance measurements. Finite interchain interactions promote long-range antiferromagnetic order below $T_N=17$ K. The derived spin canted structure is characterized by the magnetic propagation vector $\mathbf{k}=(1,0,0)$ and the reduced magnetic moment $\mathbf{m}=[0.13(7),0.50(1),0.00(8)]{\mu }_B$. 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.

13 pages, 12 figures

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