Neutron scattering study of NH4- and acid proton &quot;freezing&quot; in Rb1-x(NH4)xH2PO4

H. Grimm; E. Courtens; B. Dorner; M. Monkenbusch

doi:10.1016/0921-4526(89)90627-3

Physica B: Physics of Condensed Matter

Paper

01 Jan 1989

Neutron scattering study of NH₄- and acid proton "freezing" in Rb_1-x(NH₄)_xH₂PO₄

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Abstract

We have studied the "freezing" of the proton degrees of freedom in the structural glass Rb1-x(NH4)xH2PO4 (RADP) by means of incoherent neutron scattering. The elastic incoherent structure factor (EISF) for the NH4-reorientations has been determined. Three regimes are observed for the temperature dependence of the fixed window intensity. Their connection with NMR-measurements, X-ray- and Raman scattering, is discussed. © 1989.

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