Ultrasonic shear-wave absorption in amorphous magnetic ribbons
Shear-wave propagation has been studied experimentally in samples of amorphous ribbon material of composition Fe/sub 40/Ni/sub 38/Mo/sub 4/B/sub 18/ (METGLAS 2826MB). The samples were in the as-received, stress-relieved, and transverse-field annealed states. Pulse-echo measurements have been made at frequencies between 0.5 and 2.5 MHz and at various applied fields. The frequency dependence of the absorption coefficient is consistent with the form af+bf /sup 4/ found in crystalline solids. In the case of amorphous material the second term is attributed to scattering from domains. As-received material has a higher loss than field annealed, especially at very low applied fields; this is thought to be due to magnetic damping associated with moment rotation. The implications of these results for shear-wave magnetometry are briefly considered.
- Research Organization:
- School of Physics, University of Bath, Bath BA2 7AY, United Kingdom
- OSTI ID:
- 7017247
- Journal Information:
- J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 64:10; ISSN JAPIA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
AMORPHOUS STATE
BORON ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MAGNETIC PROPERTIES
MEDIUM TEMPERATURE
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
PHYSICAL PROPERTIES
SHEAR
SOUND WAVES
SPIN ECHO
ULTRASONIC WAVES
WAVE PROPAGATION