Quantum oscillations of the total spin in a heterometallic antiferromagnetic ring … Quantum
oscillations of the total spin in a heterometallic antiferromagnetic ring / T., Guidi; S., Carretta;
Santini, Paolo; Amoretti, Giuseppe; R., Caciuffo; A., Hiess; JRD, Copley; Y., Qiu; G., Timco;
REP, Winpenny. - (2008), pp. 18-19. Quantum oscillations of the total spin in a
heterometallic antiferromagnetic ring …

Using inelastic neutron scattering and applied fields up to 11.4 T, we have studied the spin
dynamics of the Cr 7 Ni antiferromagnetic ring in the energy window 0.05–1.6 meV. We
demonstrate that the external magnetic field induces an avoided crossing (anticrossing)
between energy levels with different total-spin quantum numbers. This corresponds to
quantum oscillations of the total spin of each molecule. The inelastic character of the
observed excitation and the field dependence of its linewidth indicate that molecular spins …