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

TL;DR

This study investigates the magnetic order and low-energy excitations in CuSe$_2$O$_5$, revealing a canted antiferromagnetic structure influenced by interchain interactions and magnetic anisotropies, using multiple experimental techniques.

Contribution

The paper provides a comprehensive experimental analysis of the magnetic structure and excitations in CuSe$_2$O$_5$, highlighting the role of interchain interactions and anisotropies in its magnetic properties.

Findings

Long-range antiferromagnetic order below 17 K.

Canted magnetic structure with specific propagation vector.

Magnetic anisotropies consistent with previous EPR studies.

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 $\bm{m}=[0.13(7), 0.50(1), 0.00(8)]\mu_B$. 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.