Observation of incommensurate spin-density-wave paramagnons

Magnetic fluctuations seen by inelastic neutron scattering in the paramagnet Cr sub 0.95 V sub 0.05 have a structure factor similar to that of the static incommensurate spin-density-wave (SDW) in pure Cr, and are thus termed SDW paramagnons. Commensurate-diffuse scattering dominant in the paramagnet...

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Veröffentlicht in:	Phys. Rev. Lett.; (United States) 1988-08, Vol.61 (5), p.558-561
Hauptverfasser:	FAWCETT, E, WERNER, S. A, GOLDMAN, A, SHIRANE, G
Format:	Artikel
Sprache:	eng
Schlagworte:	360102 - Metals & Alloys- Structure & Phase Studies ALLOYS CHROMIUM ALLOYS COHERENT SCATTERING Condensed matter: electronic structure, electrical, magnetic, and optical properties Cross-disciplinary physics: materials science rheology DIFFRACTION Exact sciences and technology Magnetic properties and materials Magnetically ordered materials: other intrinsic properties MAGNETISM MAGNONS MATERIALS SCIENCE Metals, semimetals and alloys NEUTRON DIFFRACTION Other topics in magnetic properties and materials PARAMAGNETISM PHASE TRANSFORMATIONS Physics QUASI PARTICLES SCATTERING Specific materials SPIN WAVES Spin-density waves TEMPERATURE DEPENDENCE VANADIUM ALLOYS
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Zusammenfassung:	Magnetic fluctuations seen by inelastic neutron scattering in the paramagnet Cr sub 0.95 V sub 0.05 have a structure factor similar to that of the static incommensurate spin-density-wave (SDW) in pure Cr, and are thus termed SDW paramagnons. Commensurate-diffuse scattering dominant in the paramagnetic phase of Cr is absent in Cr sub 0.95 V sub 0.05 . The amplitude of the SDW paramagnons in this alloy increases with temperature, and their energy scale extends beyong 40 meV. 20 ref.--AA
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.61.558