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Neutron scattering experiments and simulations near the magnetic percolation threshold of Fe_(x)Zn_(1-x)F_(2)

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Álvarez Galindo, Gabriel and Belanger, D.P. and Durand, A.M. and Martín Mayor, Víctor and Montoya, K. and Muro, Y. (2012) Neutron scattering experiments and simulations near the magnetic percolation threshold of Fe_(x)Zn_(1-x)F_(2). Physical review B, 86 (2). ISSN 1098-0121

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Official URL: http://dx.doi.org/10.1103/PhysRevB.86.024416


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Abstract

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.


Item Type:Article
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© 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.

Uncontrolled Keywords:Ising system Fe(x)Zn(1-x)F(2); Anti-ferromagnet; Anisotropic antiferromagnet; Fraction excitations; Spin waves; MnF(2); Dynamics; Behavior; FeF(2).
Subjects:Sciences > Physics > Physics-Mathematical models
ID Code:45093
Deposited On:22 Nov 2017 11:35
Last Modified:10 Dec 2018 15:09

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