Microscopic Magnetic Nature of the Quasi-one-Dimensional Antiferromagnet BaCo2V2O8

TL;DR

This study investigates the microscopic magnetic properties of the quasi-one-dimensional antiferromagnet BaCo2V2O8 using muon spin rotation, revealing long-range magnetic order below TN and short-range correlations around 44 K.

Contribution

First microscopic magnetic investigation of BaCo2V2O8 using {bc}+SR, identifying long-range order and short-range correlations in a single crystalline sample.

Findings

Presence of multiple muon frequencies below TN indicating long-range order.

Anomaly in relaxation rate at 44 K indicating short-range 1D correlations.

Well-fitted relaxation spectra above 5 K with power-exponential function.

Abstract

The title compound belongs to a wide group of quasi-one-dimensional (Q1D) antiferromagnets (AF) and its Co2+ ions form Q1D screw-chains along the c-axis. We here present the first investigation of the microscopic magnetic nature of a single crystalline BaCo2V2O8 sample using {\mu}+SR. Our data reveal the presence of several clear muon frequencies below TN indicating the onset of a long-range order. Above 5 K, the {\mu}+SR spectra is well fitted to a simple power-exponential relaxing function. The temperature dependence of the relaxation-rate ({\lambda}) as well as the power (n) display a clear anomaly around T = 44 K, indicating the onset of short-range 1D correlations.