About cookies on this site Our websites require some cookies to function properly (required). In addition, other cookies may be used with your consent to analyze site usage, improve the user experience and for advertising. For more information, please review your options. By visiting our website, you agree to our processing of information as described in IBM’sprivacy statement. To provide a smooth navigation, your cookie preferences will be shared across the IBM web domains listed here.
Publication
Physical Review B
Paper
Neutron scattering study of spin waves in the amorphous metallic ferromagnet (Fe93Mo7)80B10P10
Abstract
Low-angle inelastic-neutron-scattering experiments were performed on an amorphous ferromagnet of composition (Fe93Mo7)80B10P10 with Tc=450 K. Well-defined spin waves were observed over the entire range of momentum transfer for which the scattering triangle could be closed (q≤0.25 -1). The results were consistent with a normal ferromagnetic dispersion relation hω(q)=Δ+Dq2+Eq4+..., where the gap Δ can be largely accounted for by demagnetization effects. Low-temperature magnetization measurements were performed and fit to the relation M(T)=M0 (1-BT32-CT52). The measured long-wavelength spin waves account for only 70% of the density of magnon states necessary to explain M(T). For temperatures below 300 K, the mean spin-wave energies are well represented by the relation ω(q, T)=ω(q,0)[1-0. 612(TTc)52]. © 1977 The American Physical Society.