Magnetic and crystallization behavior of Be-substituted Fe/sub 82/B/sub 18/ metallic glasses

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

OSTI ID:6722582

Severin, C S; Chen, C W

Substitution of Be for B in the amorphous binary alloy Fe/sub 82/B/sub 18/ was observed to cause an initial increase in saturation magnetization (M/sub s/) to a maximum of 200 emu/g at 4.2K, followed by a decrease for alloys with more than 4 at % Be. Meanwhile, the Curie temperature of the Fe/sub 82/B/sub 18-y/ Be/sub y/ alloys decreased progressively with the Be content. These changes in M/sub s/ and T/sub C/ differ from those observed in the Fe-B-M' metallic glasses, where M' is another metalloid (P, C, Si or Ge). Results from Auger electron spectroscopy and Moessbauer experiments confirmed the reversal trend detected in the magnetization measurements. Combining all these results enables us to attribute the initial increase in M/sub s/ to a smaller charge transfer from the Be atoms than that from the B atoms to Fe and the subsequent decrease in M/sub s/ to a possible clustering of the Be atoms at higher concentrations. The annealing behavior for the present alloys is described in terms of crystallization stages and the phases formed.

• Research Organization: Ames Lab., IA (USA); Iowa State Univ. of Science and Technology, Ames (USA)
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 6722582
• Report Number(s): IS-M-303; CONF-801134-12
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
AMORPHOUS STATE
ANNEALING
AUGER ELECTRON SPECTROSCOPY
BERYLLIUM ALLOYS
BORIDES
BORON COMPOUNDS
CHEMICAL COMPOSITION
CRYSTALLIZATION
CURIE POINT
ELECTRON SPECTROSCOPY
GLASS
HEAT TREATMENTS
IRON BORIDES
IRON COMPOUNDS
MAGNETIZATION
MOESSBAUER EFFECT
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
QUANTITY RATIO
SPECTROSCOPY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
ULTRALOW TEMPERATURE