Magnetic correlations in amorphous Fe-Zr alloys

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

DOI:https://doi.org/10.1063/1.340554· OSTI ID:5328518

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

Results of high-resolution small-angle neutron scattering (SANS) studies on amorphous alloys of composition Fe/sub x/Zr/sub 100-//sub x/, x = 90, 91, 92, show that ferromagnetic correlations exist below T/sub c/, but that conventional long-range order is destroyed by competing exchange interactions. The transition temperatures drop with increasing iron concentration (T/sub c/ approx. =226 K for Fe/sub 90/Zr/sub 10/ down to T/sub c/ approx. =175 K for Fe/sub 92/Zr/sub 8/). Data taken at very low Q (0.008 A/sup -1/<0.02 A/sup -1/) provide evidence of relatively large (approx. =200--approx. =400 A) static spin clusters which do not disorder at T/sub c/. Superposed on this is an ordering with a second shorter length scale which shows a cusp (not divergent) at the bulk T/sub c/. The data were fitted to a combination of a Lorentzian and a power of a Lorentzian, the latter of which represents scattering from clusters with a Maxwellian distribution of sizes.

• Research Organization: Institute for Materials Science and Engineering, National Bureau of Standards, Gaithersburg, Maryland 20899
• OSTI ID: 5328518
• Journal Information: J. Appl. Phys.; (United States), Vol. 63:8
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
IRON ALLOYS
MAGNETIC SUSCEPTIBILITY
ZIRCONIUM ALLOYS
CORRELATIONS
CURIE POINT
FERROMAGNETISM
NEUTRON DIFFRACTION
TEMPERATURE DEPENDENCE
ALLOYS
COHERENT SCATTERING
DIFFRACTION
MAGNETIC PROPERTIES
MAGNETISM
PHYSICAL PROPERTIES
SCATTERING
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
360104* - Metals &amp; Alloys- Physical Properties