Magnetic correlations in amorphous Fe-Zr alloys

Conference · Thu Jan 01 00:00:00 EST 1987

OSTI ID:5524569

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-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/sup 0/K for Fe/sub 90/Zr/sub 10/ down to T/sub c/ approx. =175/sup 0/K for Fe/sub 92/Zr/sub 8/). Data taken at very low Q (0.008A/sup -1/ < Q < 0.02 A/sup -1/) provide evidence of relatively large (approx. =200 to 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. 10 refs., 3 figs.

• Research Organization: National Bureau of Standards, Washington, DC (USA). Inst. for Materials Science and Engineering; Oak Ridge National Lab., TN (USA); Allied-Signal, Inc., Morristown, NJ (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5524569
• Report Number(s): CONF-871126-10; ON: DE88005847
• Resource Relation: Conference: 32. conference on magnetism and magnetic materials, Chicago, IL, USA, 9 Nov 1987; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
IRON BASE ALLOYS
FERROMAGNETISM
ZIRCONIUM ALLOYS
AMORPHOUS STATE
CORRELATIONS
EXCHANGE INTERACTIONS
NEUTRONS
SMALL ANGLE SCATTERING
SPLAT COOLING
TEMPERATURE DEPENDENCE
TRANSITION TEMPERATURE
ALLOYS
BARYONS
COOLING
ELEMENTARY PARTICLES
FERMIONS
HADRONS
INTERACTIONS
IRON ALLOYS
MAGNETISM
NUCLEONS
PHYSICAL PROPERTIES
SCATTERING
THERMODYNAMIC PROPERTIES
360104* - Metals &amp; Alloys- Physical Properties