Local Magnetic Susceptibility of the Positive Muon in the Quasi 1D S=1/2 Antiferromagnet dichlorobis (pyridine) copper (II)

TL;DR

This study uses muon spin rotation to measure local magnetic susceptibility in a quasi-1D S=1/2 antiferromagnet, revealing site-specific perturbations and comparing results with numerical simulations.

Contribution

It provides new insights into muon-induced perturbations in low-dimensional magnetic systems and compares experimental data with advanced numerical models.

Findings

Distinct site signals with temperature-dependent shifts

Muon perturbation affects local susceptibility

Agreement with Transfer Matrix DMRG simulations

Abstract

We report muon spin rotation measurements of the local magnetic susceptibility around a positive muon in the paramagnetic state of the quasi one-dimensional spin 1/2 antiferromagnet dichlorobis (pyridine) copper (II). Signals from three distinct sites are resolved and have a temperature dependent frequency shift which is significantly different than the magnetic susceptibility. This difference is attributed to a muon induced perturbation of the spin 1/2 chain. The obtained frequency shifts are compared with Transfer Matrix DMRG numerical simulations.