On the Problem of the Staggered Field in CuGeO3 Doped with Magnetic Impurities

TL;DR

This paper investigates the behavior of the staggered magnetic field in doped CuGeO3 using EPR data, revealing anomalous temperature and field dependencies linked to unique magnetic interactions.

Contribution

It introduces a calculation of the staggered field magnitude in doped CuGeO3 and explores its unusual dependence on temperature and magnetic field.

Findings

Staggered field shows anomalous temperature dependence.

Magnetic field influences the staggered field in a non-traditional way.

Competition between exchange interactions and Zeeman energy affects the staggered field.

Abstract

The magnitude of the staggered field is calculated from the EPR data for CuGeO3 doped with Co and Fe magnetic impurities. It is found that this parameter demonstrate an anomalous temperature and magnetic field dependence probably due to (i) the specific mechanism of the staggered field generation in doped CuGeO3 and (ii) a competition between antiferromagnetic interchain exchange and staggered Zeeman energy.