کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10129051 1645163 2019 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Invariant incommensurate coherence length in spin-density-wave excitation of Cr0.99Fe0.01
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Invariant incommensurate coherence length in spin-density-wave excitation of Cr0.99Fe0.01
چکیده انگلیسی
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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 469, 1 January 2019, Pages 629-632
نویسندگان
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