Gil, YolimarQuesada-Moreno, María MarPalacios-López, María ÁngelesGómez-Coca, SilviaColacio, EnriqueRuiz, EliseoAravena, Daniel2025-07-212025-07-212025Inorg. Chem. Front., 2025, 12, 2856-28712052-155310.1039/D4QI03259Dhttps://hdl.handle.net/10953/5968We present a general relationship between the magnetisation blocking temperature (TB) measured using the zero-field cooling/field cooling technique (ZFC/FC) and the temperature-dependent spin relaxation time obtained from AC susceptibility and magnetisation decay measurements. The presented mathematical approach supplies ZFC/FC blocking temperatures at any heating rate (RH), providing comparable values to those obtained experimentally, as demonstrated by testing 107 examples for reported single-molecule magnets (SMMs) where the ZFC/FC curve has been measured. This procedure is examined in further detail for a new single-molecule magnet, [Dy(OPAd2Bz)2(H2O)4Br]Br2·4THF (1) (OPAd2Bz: di(1-adamantyl)benzylphosphine oxide). For this compound, ZFC/FC measurements were made over a broad range of heating rates (0.01–5 K min−1), which agreed with the general behaviour predicted from AC susceptibility data. We discuss how the demagnetisation mechanism determines the sensitivity of TB with respect to the heating rate: TB is mostly insensitive to RH for Orbach relaxation, while there is a larger sensitivity for Raman-limited systems. Our conclusions provide a clear physical interpretation of ZFC/FC blocking temperatures, aiding in the proper contextualization of this figure of merit.engAttribution-NonCommercial-NoDerivs 3.0 Spainhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/Single Molecule MagnetsZFC/FC blocking temperaturesDysprosiumPentagonal bipyramidal geometryinfo:eu-repo/semantics/article544546info:eu-repo/semantics/openAccess