Magnetic properties of Ag(2)VOP(2)O(7): an unexpected spin dimer system

TL;DR

This study reveals that Ag(2)VOP(2)O(7), despite its layered structure, behaves as a spin dimer system with an intradimer interaction of about 30 K, highlighting the importance of microscopic models in magnetic property analysis.

Contribution

The paper demonstrates that Ag(2)VOP(2)O(7) is a spin dimer system, challenging assumptions based solely on its layered crystal structure.

Findings

Magnetic susceptibility fits indicate a 30 K intradimer interaction.

Electronic structure calculations support the spin dimer model.

Structural analysis alone may mislead magnetic behavior interpretation.

Abstract

Magnetic properties of the silver vanadium phosphate Ag(2)VOP(2)O(7) are studied by means of magnetic susceptibility measurements and electronic structure calculations. In spite of the layered crystal structure suggesting 1D or 2D magnetic behavior, this compound can be understood as a spin dimer system. The fit of the magnetic susceptibility indicates an intradimer interaction of about 30 K in perfect agreement with the computational results. Our study emphasizes the possible pitfalls in interpreting experimental data on structural basis only and points out the importance of microscopic models for the understanding of the magnetic properties of vanadium phosphates.