Probing the magnetic ground state of the molecular Dysprosium triangle

TL;DR

This study investigates the magnetic ground state of a Dysprosium triangle molecular magnet using muon spin relaxation, revealing coexistence of static and dynamic magnetic fields below 35 K without long-range magnetic order.

Contribution

The paper provides the first muon spin relaxation analysis of a Dysprosium triangle, identifying static and dynamic magnetic fields and their temperature dependence.

Findings

Static magnetic fields coexist with dynamic fluctuations below 35 K.

No evidence of magnetic ordering from bulk measurements.

Dynamic fluctuation time estimated at ~0.55 microseconds at low temperatures.

Abstract

We present zero field muon spin lattice relaxation measurements of a Dysprosium triangle molecular magnet. The local magnetic fields sensed by the implanted muons indicate the coexistence of static and dynamic internal magnetic fields below $T^* ~35$ K. Bulk magnetization and heat capacity measurements show no indication of magnetic ordering below this temperature. We attribute the static fields to the slow relaxation of the magnetization in the ground state of Dy3. The fluctuation time of the dynamic part of the field is estimated to be ~0.55 $\mu$s at low temperatures