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Updated: May 24, 2026

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
Published on: July 20, 2022
Magnetic properties and relaxation dynamics of a frustrated Ni₇ molecular nanomagnet
E Garlatti1, S Carretta, M Affronte
1Dipartimento di Scienze Molecolari Applicate ai Biosistemi, Universit`a di Milano, via Trentacoste 2, I-20134 Milano, Italy.
Abstract:
The Ni₇ nanomagnet represents an ideal model system for investigating the effects of geometrical frustration in magnetic interactions. The Ni ions in the magnetic core are arranged on two corner-sharing tetrahedra and interact through antiferromagnetic exchange couplings. We show that the high degree of frustration leads to a magnetic energy spectrum with large degeneracies which result in unusual static and dynamical magnetic properties. In particular, the relaxation dynamics of the magnetization is characterized by several distinct characteristic times. We also discuss the possible interest of Ni₇ for magnetocaloric refrigeration.
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