High magnetic moment in Fe/sub 87/B/sub 11/Au/sub 2/ ribbons

Journal Article · Mon Nov 01 04:00:00 EST 1982 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.330192· OSTI ID:5687014

Severin, C S; Chen, C W

Amorphous Fe/sub 87/B/sub 11/Au/sub 2/ ribbons that are stable above 300 K displayed saturation magnetization M/sub s/ of 223 emu/g at 4.2 K. The deduced average Fe atomic moment mu-bar/sub Fe/ was 2.46 ..mu../sub B/, which is relatively high compared to mu-bar/sub Fe/ = 2.13 ..mu../sub B/ in Fe/sub 87/B/sub 13/. The higher Fe moment is attributed to a quenched-in, high-volume Fe lattice (similar to that found in amorphous Fe-Au films) stabilized by Au and B atoms. Upon annealing, three crystallization stages were observed. First, a ..cap alpha..-Fe phase with about 3 at.% Au emerged at around 620 K followed by a Fe/sub 2/B phase at roughly-equal745 K. At roughly-equal790 K, a Au-rich phase emerged. There were decreases in M/sub s/ (4.2 K) as the isothermal annealing temperature was increased, with the largest decrease coinciding with the precipitation of Fe/sub 2/B.

• Research Organization: Tektronix Incorporated, Beaverton, Oregon 97077
• OSTI ID: 5687014
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 53:11; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
AMORPHOUS STATE
ANNEALING
BORON ALLOYS
CRYSTALLIZATION
ELECTRONIC STRUCTURE
GOLD ALLOYS
HEAT TREATMENTS
IRON ALLOYS
IRON BASE ALLOYS
MAGNETIC MOMENTS
MAGNETIZATION
MAGNETOMETERS
MEASURING INSTRUMENTS
PHASE TRANSFORMATIONS
ULTRALOW TEMPERATURE
VIBRATING SAMPLE MAGNETOMETERS