Investigation of the ferromagnetic-spin glass transition in a-(Fe/sub 77/Cr/sub 23/)/sub 75/P/sub 16/B/sub 6/Al/sub 3/

Journal Article · Tue Mar 20 04:00:00 EST 1984 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.333447· OSTI ID:5257379

Wicksted, J P; Shapiro, S M; Chen, H S

Elastic and inelastic neutron scattering studies were performed on the amorphous alloy (Fe/sub 77/Cr/sub 23/)/sub 75/P/sub 16/B/sub 6/Al/sub 3/. These measurements were conducted over a temperature range from 1.8 K to room temperature. The elastic scattering results obtained at Q = 0.025 A/sup -1/ indicated a Curie temperature approx.184 K in addition to a ferromagnetic-spin glass transition below 15 K. These values are consistent with the phase diagram construction resulting from the magnetization and ac susceptibility measurements of Yeshurun et al. Inelastic neutron scattering measurements resulted in well-defined spin waves being observed in the ferromagnetic phase. For the small Q range studied (0.05--0.1 A/sup -1/), the spin wave energies followed a quadratic dispersion. As the temperature was lowered towards the spin glass regime, the spin wave energies decreased indicating a softening of the magnetic stiffness constant. Below 10 K, no well-defined spin wave excitations were present; however, a quasielastic peak, which increased slightly as the temperature was lowered, was observed.

• Research Organization: Brookhaven National Laboratory, Upton, New York 11973
• OSTI ID: 5257379
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 55:6; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
AMORPHOUS STATE
CURIE POINT
FERROMAGNETISM
IRON ALLOYS
IRON BASE ALLOYS
LOW TEMPERATURE
MAGNETISM
MEDIUM TEMPERATURE
NEUTRON SPECTRA
PHYSICAL PROPERTIES
SPECTRA
SPIN GLASS STATE
SPIN WAVES
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE