Study of the temperature dependence of spin-wave excitations in Fe/sub x/Cr/sub 1-x/

Conference · Tue Jan 01 04:00:00 EST 1980

OSTI ID:7063971

Shapiro, S M; Fincher, Jr, C R; Palumbo, A H; Parks, R D

Certain alloys of Fe/sub x/Cr/sub 1-x/ (0.18 < x < 0.30) have been reported to undergo a transition from a ferromagnetic state to one exhibiting mictomagnetic or spin-glass behavior at temperatures below the Curie temperature, T/sub c/. Studies of the critical scattering on polycrystalline samples show a peak at T/sub c/ for all x's and a monotonically decreasing intensity for T < T/sub c/ for x > 0.30. For those x's exhibiting spin-glass behavior, there is an increase in intensity at low temperatures. The dynamical studies reveal well-defined spin waves within the ferromagnetic regime but as T approaches the spin-glass phase, the magnetic stiffness decreases dramatically.

• Research Organization: Brookhaven National Lab., Upton, NY (USA); Rochester Univ., NY (USA). Dept. of Physics and Astronomy; Polytechnic Inst. of New York, Brooklyn (USA). Dept. of Physics
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 7063971
• Report Number(s): BNL-28449; CONF-801134-2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals &amp; Alloys-- Physical Properties
ALLOYS
CHROMIUM ALLOYS
IRON ALLOYS
MAGNETIC PROPERTIES
PHYSICAL PROPERTIES
TEMPERATURE DEPENDENCE