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arXiv · 2609.00360

Improved Threshold for Particle-Induced Magnetic Avalanche in Single-Molecule Magnets Using Fe$_8$ Molecule

Bailey Kohn·Rupak Mahapatra·Ivan Borzenets·Lok Raj Pant·Amis Sharma·Tom Melia·Michael Nippe·Anna Schmautz·Surjeet Rajendran
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Abstract

Extending the original work on the development of a magnetic avalanche detector using Mn$_{12}$-ac single-molecule magnet (SMM), we report the results on a significantly lower threshold magnetic avalanche detector using Fe$_8$ SMM. Fe$_8$ has an order of magnitude smaller relaxation time that is expected to produce at least 3 orders of magnitude lower avalanche threshold compared to Mn$_{12}$-ac. We confirm this experimentally through the detection of gamma particles with energy at least two orders of magnitude lower than the original Mn$_{12}$-ac detection demonstrated using alpha particles, limited by the experimentally available radiation source. The true threshold of avalanche may be significantly lower and will be explored with lower energy x-rays and potentially infrared photons.

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Bailey Kohn, Rupak Mahapatra, Ivan Borzenets, Lok Raj Pant, Amis Sharma, Tom Melia, Michael Nippe, Anna Schmautz, Surjeet Rajendran. 2026-08-31. Improved Threshold for Particle-Induced Magnetic Avalanche in Single-Molecule Magnets Using Fe$_8$ Molecule. https://arxiv.org/abs/2609.00360

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