High frequency EPR spectra of a molecular nanomagnet provide a key to understand Quantum Tunneling of the Magnetization

A. L. Barra, D. Gatteschi, R. Sessoli

EPR spectra have been recorded in very high field, up to 25T, and at high frequency, up to 525 GHz, on a polycristalline sample of Mn12ac (see paper for detailed formula), the firs…