Transition from one-dimensional antiferromagnetism to three-dimensional antiferromagnetic order in single-crystalline CuSb$_{2}$O$_{6}$

TL;DR

This study investigates the magnetic properties of CuSb$_{2}$O$_{6}$, revealing a transition from one-dimensional to three-dimensional antiferromagnetic order around 8.7 K, with unusual thermal and magnetic behavior linked to a possible Spin-Peierls transition.

Contribution

It provides experimental evidence of a crossover from 1D to 3D antiferromagnetism in CuSb$_{2}$O$_{6}$ and suggests a novel Spin-Peierls transition involving phonons and Jordan-Wigner fermions.

Findings

Broad susceptibility peak near 60 K indicating 1D antiferromagnetism

Long-range order at 8.7 K with an energy gap of 17.48 K

Distinct jumps in heat capacity and thermal expansion at T_N

Abstract

Measurements of magnetic susceptibility, heat capacity and thermal expansion are reported for single crystalline CuSb$_{2}$O$_{6}$ in the temperature range $5<T<350$ K. The magnetic susceptibility exhibits a broad peak centered near 60 K that is typical of one-dimensional antiferromagnetic compounds. Long-range antiferromagnetic order at $T_N$ = 8.7 K is accompanied by an energy gap ($\Delta$ = 17.48(6) K). This transition represents a crossover from one- to three-dimensional antiferromagnetic behavior. Both heat capacity and the thermal expansion coefficients exhibit distinct jumps at $T_N$, which are similar to those observed at the normal-superconducting phase transition in a superconductor. This behavior is quite unusual, and is presumably associated with a Spin-Peierls transition occurring as a result of three-dimensional phonons coupling with {\it Jordan-Wigner-transformed} Fermions.