Realization of discretized response in rare-earth vanadates accessed by AC susceptibility and magnetocaloric methods

TL;DR

This paper introduces a combined AC susceptibility and caloric measurement technique to analyze the discretized thermal and magnetic response of rare-earth vanadates, revealing intrinsic relaxation timescales and enabling comprehensive thermal circuit analysis.

Contribution

It presents a novel integrated method for studying the dynamic magnetic and thermal responses in rare-earth vanadates, applicable to various complex materials with energy dissipation processes.

Findings

Demonstrated discretized thermal analysis in YbVO4

Revealed intrinsic relaxation timescales of magnetic ions

Established a unified approach for complex response measurement

Abstract

This report presents a new technique to probe the quantitative dynamical response of the magnetic field induced heating/cooling process in rare-earth vanadium materials. The approach combines AC susceptibility and AC caloric measurements to reveal the intrinsic timescale associated with the magnetic relaxation process of rare-earth ions at low temperatures. Utilizing the well-known crystal field effect in YbVO4, we prove and demonstrate a discretized thermal analysis through a common spin-lattice relaxation phenomenon. The demonstration experiment presented in this study provides a general approach to quantitatively address multiple measured quantities in one unified discretized thermal circuit analysis. It can be extended to study other magnetic, dielectric, and elastic materials exhibiting a complex response to an external driving field in the presence of intrinsic interactions and fluctuations, particularly when an energy dissipation process is within an accessible frequency regime.