Impurity-induced magnetic order in the mixture of two spin gap systems (CH3)2CHNH3CuCl3 and (CH3)2CHNH3CuBr3

TL;DR

This study investigates how impurity-induced magnetic order emerges in a mixed spin gap system using NMR, revealing magnetic ordering at low temperatures in a specific composition.

Contribution

It provides experimental evidence of impurity-induced magnetic order in a mixed spin gap system through NMR analysis, highlighting the role of impurities in magnetic ordering.

Findings

Magnetic ordering observed at TN=13.5K in the sample with 85% Cl content.

NMR spectra indicate a simple antiferromagnetic state in the ordered phase.

Impurities induce magnetic order in the mixed spin gap system.

Abstract

The ground state of the solid solution of the two spin gap systems (CH3)2CHNH3CuCl3 and (CH3)2CHNH3CuBr3 has been investigated by 1H-NMR. The existence of a magnetic ordering in the sample with the Cl-content x=0.85 was clearly demonstrated by a drastic splitting in a resonance line at low temperatures below TN=13.5K. The observed NMR spectra in the ordered state was qualitatively consistent with the simple antiferromagnetic state.