Low temperature spin waves in amorphous Fe/sub 90-x/Ni/sub x/Zr/sub 10/
Conference
·
OSTI ID:5818054
Inelastic neutron scattering measurements have been performed on rapid-quenched ribbons of Fe/sub 90-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 T less than or equal to0.5 T/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. 8 refs., 3 figs.
- Research Organization:
- Oak Ridge National Lab., TN (USA); Maryland Univ., College Park (USA). Dept. of Physics; National Bureau of Standards, Washington, DC (USA). Inst. for Materials Science and Engineering; Allied-Signal, Inc., Morristown, NJ (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 5818054
- Report Number(s):
- CONF-871126-5; ON: DE88001752
- Country of Publication:
- United States
- Language:
- English
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Journal Article
·
Fri Apr 15 00:00:00 EDT 1988
· J. Appl. Phys.; (United States)
·
OSTI ID:7202323
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Conference
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·
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Journal Article
·
Tue May 01 00:00:00 EDT 1990
· Journal of Applied Physics; (USA)
·
OSTI ID:6838028
Related Subjects
36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
656002 -- Condensed Matter Physics-- General Techniques in Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
AMORPHOUS STATE
ANTIFERROMAGNETISM
CRITICAL TEMPERATURE
FERROMAGNETISM
INELASTIC SCATTERING
INVAR
IRON ALLOYS
IRON BASE ALLOYS
LINE WIDTHS
LOW TEMPERATURE
MAGNETIC PROPERTIES
MAGNETISM
MAGNONS
NICKEL ALLOYS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
QUASI PARTICLES
SCATTERING
SPECTRA
SPIN GLASS STATE
SPIN WAVES
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
ZIRCONIUM ALLOYS
360104* -- Metals & Alloys-- Physical Properties
656002 -- Condensed Matter Physics-- General Techniques in Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
AMORPHOUS STATE
ANTIFERROMAGNETISM
CRITICAL TEMPERATURE
FERROMAGNETISM
INELASTIC SCATTERING
INVAR
IRON ALLOYS
IRON BASE ALLOYS
LINE WIDTHS
LOW TEMPERATURE
MAGNETIC PROPERTIES
MAGNETISM
MAGNONS
NICKEL ALLOYS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
QUASI PARTICLES
SCATTERING
SPECTRA
SPIN GLASS STATE
SPIN WAVES
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
ZIRCONIUM ALLOYS