A Caveat for Single-Molecule Magnetism: Non-linear Arrhenius Plots

Details A Caveat for Single-Molecule Magnetism: Non-linear Arrhenius Plots A Caveat for Single-Molecule Magnetism: Non-linear Arrhenius Plots

2009-06-04

arxiv.org/abs/0906.0812v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, to appear in ChemPhysChem

Scientific paper

The magnetization relaxation of Mn12 single-molecule magnets (SMMs) does not follow a simple Arrhenius law, even for data collected at low frequencies (5-1500 Hz) due to contributions from relaxation pathways via excited states with larger thermal barriers, but much faster attempt rates. A modified Arrhenius equation is presented as a means to overcome this problem and obtain a more reliable limiting value for the barrier to magnetization relaxation associated with the ground S=10 state.

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