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/

Conference · Sat Oct 01 00:00:00 EDT 1983

OSTI ID:5488740

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 = 0.025A/sup -1/ indicated a Curie temperature of 185/sup 0/K in addition to a ferromagnetic-spin glass transition below 20 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 (0.05A/sup -1/ to 0.1A/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/sup 0/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 Lab., Upton, NY (USA); Bell Labs., Murray Hill, NJ (USA)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5488740
• Report Number(s): BNL-33827; CONF-831187-10; ON: DE84002874
• Resource Relation: Conference: MMM conference, Pittsburgh, PA, USA, 8 Nov 1983
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
FERROMAGNETISM
BORON ALLOYS
CHROMIUM ALLOYS
IRON BASE ALLOYS
METALLIC GLASSES
PHOSPHORUS ADDITIONS
CURIE POINT
ELASTIC SCATTERING
INELASTIC SCATTERING
LOW TEMPERATURE
MEDIUM TEMPERATURE
NEUTRON BEAMS
PHASE TRANSFORMATIONS
SPIN WAVES
TEMPERATURE DEPENDENCE
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
ALLOYS
BEAMS
IRON ALLOYS
MAGNETISM
NUCLEON BEAMS
PARTICLE BEAMS
PHYSICAL PROPERTIES
SCATTERING
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
360102* - Metals & Alloys- Structure & Phase Studies