Evolution of Structure and Magnetic Properties of Cu2MnBO5 under Partial Mn3+->Fe3+ Substitution

TL;DR

This study investigates how partial Fe substitution affects the structure and magnetic properties of Cu2MnBO5 ludwigites, revealing structural distortions and magnetic behavior changes through synthesis and advanced characterization techniques.

Contribution

It provides new insights into the structural and magnetic evolution of Cu2MnBO5 ludwigites under partial Fe substitution, using comprehensive experimental analysis.

Findings

Structural distortions differ from the parent compound.

Magnetic properties strongly depend on Fe content.

Magnetic ordering type changes with substitution.

Abstract

Single crystals of Fe-substituted Cu2Mn1-xFexBO5 ludwigites have been synthesized using flux technique (x=0.2, 0.4, 0.5 - in the initial flux system). Structural properties of the synthesized compounds were studied by the single crystal and powder X-ray diffraction analysis. Obtained results were analyzed in the relationship with parent compound Cu2MnBO5. It was revealed that the type of monoclinic distortions of Fe-substituted ludwigites is different from the structure of Cu2MnBO5. The real cation composition and local structure of Cu2Mn1-xFexBO5 ludwigites were studied using XANES and EXAFS techniques, respectively. Analysis of field and thermal dependencies of magnetization showed a strong dependence of the magnetic properties of these ludwigites on x with changing the type of magnetic ordering.