Article ID Journal Published Year Pages File Type
10129051 Journal of Magnetism and Magnetic Materials 2019 12 Pages PDF
Abstract
Low-energy magnetic excitation of spin-density wave (SDW) was measured using a single crystal of Cr0.99Fe0.01 by cold neutron triple-axis spectroscopy. Because of the unchanged incommensurate Q and the constant line width in 2.5⩽ℏω⩽6 meV, the magnetic excitation could not be explained with a conventional dispersion of ℏωq∝q. Here, we conjectured the presence of standing waves, which would be excited in local spin matrices. The effectively vertical dispersion was attributed to the longitudinal spin fluctuation in the spin matrices. A series of low-energy magnetic excitations in Cr alloys could be understood with the coexistence of the standing waves and progressive waves such as spin waves.
Related Topics
Physical Sciences and Engineering Physics and Astronomy Condensed Matter Physics
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