An operational definition of the 100 second blocking temperature T$_{\mathrm{B}100}$ for single molecule magnets

TL;DR

This paper introduces an operational definition for the 100 second blocking temperature T$_{ ext{B}100}$ in single-molecule magnets, enabling consistent comparison of magnetic performance regardless of relaxation process complexities.

Contribution

It proposes a new method to define zero-field relaxation times, facilitating standardized measurement of T$_{ ext{B}100}$ across different SMM samples.

Findings

Provides a clear operational procedure for relaxation time measurement.

Enables comparison of SMM performance independent of relaxation mechanisms.

Facilitates benchmarking of single-molecule magnets.

Abstract

An important figure of merit for the performance of single-molecule magnets (SMMs) is the 100 s blocking temperature T$_{\mathrm{B}100}$. It is the temperature at which the remanence or zero field relaxation time is 100 seconds. If there is more than one relaxation process of the magnetisation, the determination of the relaxation times may, however, become ambiguous. Here we propose an operational definition for the zero-field magnetic relaxation times from which T$_{\mathrm{B}100}$ may be determined. This definition allows for a direct comparison of the performance of different samples independent of the details of the relaxation processes involved in the demagnetization.