Low-temperature spin waves in amorphous Fe/sub 90-//sub x/Ni/sub x/Zr/sub 10/

Journal Article · Fri Apr 15 04:00:00 EDT 1988 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.340655· OSTI ID:7202323

Fernandez-Baca, J A; Lynn, J W; Rhyne, J J; Fish, G E

Inelastic neutron scattering measurements have been performed on rapid-quenched ribbons of Fe/sub 90-//sub x/Ni/sub x/Zr/sub 10/ (x = 1,5,10) to measure the small wave-vector spin-wave spectrum. At all three concentrations a quadratic dispersion relation typical of an isotropic ferromagnet is observed, but with anomalous properties at low temperatures. For x = 5 and 10 the excitations are found to broaden considerably for temperatures less than or equal to0.3 T/sub c/. For x = 1 the spin waves not only broaden for Tless than or equal to0.5T/sub c/, but the spin-wave energies decrease monotonically with decreasing temperature while a resolution-limited quasielastic component of the scattering develops. These results are consistent with a picture of competing ferromagnetic and antiferromagnetic interactions, with reentrant spin-glass behavior evident if the frustration is sufficiently strong.

• Research Organization: Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 and Center of Materials Science, National Bureau of Standards, Gaithersburg, Maryland 20899
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 7202323
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 63:8; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOY SYSTEMS
ALLOYS
AMORPHOUS STATE
COHERENT SCATTERING
DIFFRACTION
IRON ALLOYS
MAGNETIC PROPERTIES
NEUTRON DIFFRACTION
NICKEL ALLOYS
PHYSICAL PROPERTIES
SCATTERING
SPIN GLASS STATE
SPIN WAVES
TERNARY ALLOY SYSTEMS
ZIRCONIUM ALLOYS