Álvarez Galindo, GabrielBelanger, D.P.Durand, A.M.Martín Mayor, VíctorMontoya, K.Muro, Y.2023-06-202023-06-202012-07-121098-012110.1103/PhysRevB.86.024416https://hdl.handle.net/20.500.14352/42757© 2012 American Physical Society. We acknowledge partial financial support from MICINN, Spain, (Grant Nos. FIS2009-12648-C03 and FIS2011-22566), and from UCM-Banco Santander (GR32/10-A/910383, GR58/08-910556). V.M.-M. thanks the del Amo foundation and the hospitality of the Physics Department of U. California Santa Cruz, where part of this work was performed. We thank the members of the Neutron Scattering Laboratory, Institute for Solid State Physics, the University of Tokyo for supporting our experiments.The low temperature excitations in the anisotropic antiferromagnetic Fe_(x)Zn_(1-x)F_(2) for x = 0.25 and 0.31, at and just above the magnetic percolation threshold concentration x_(p) = 0.25, were measured using inelastic neutron scattering. The excitations were simulated for x = 0.31 using a localized, classical excitation model, which accounts well for the energies and relative intensities of the excitations observed in the scattering experiments.engjournal articlehttp://dx.doi.org/10.1103/PhysRevB.86.024416https://journals.aps.orgopen access53Ising system Fe(x)Zn(1-x)F(2)Anti-ferromagnetAnisotropic antiferromagnetFraction excitationsSpin wavesMnF(2)DynamicsBehaviorFeF(2).Física-Modelos matemáticos