The use of magnetostrictive film transducers in the measurement of elastic moduli and ultrasonic attenuation of solids

Autor:	R. B. Schwarz, V.‐T. Kuokkala
Rok vydání:	1992
Předmět:	Condensed Matter::Materials Science Transducer Materials science Transductor Resonance Magnetostriction Composite material Thin film Instrumentation Elastic modulus Amorphous solid Magnetic field
Zdroj:	Review of Scientific Instruments. 63:3136-3142
ISSN:	1089-7623 0034-6748
Popis:	The authors describe a novel method and apparatus for measuring the elastic moduli and ultrasonic attenuation of small samples (millimeter dimensions) over a wide temperature range. In the most general case, a nonmagnetic sample is coated with a thin film of a magnetostrictive material (e.g., nickel or iron‐cobalt alloy). This film performs both as a driving transducer and as a receiving transducer. An alternating magnetic field of variable frequency generates a periodic stress in the film and drives the sample into mechanical resonances. The permeability of the film changes when the sample is resonating and allows the detection of the resonances. The operation of the system and the mathematical procedures to deduce the elastic moduli and ultrasonic attenuation from the measured resonance spectra are exemplified with measurements on amorphous Ni80P20 in the temperature range of 80–520 K.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d16296e134a4247d3a9ef999e2c4da49 https://doi.org/10.1063/1.1142566 Zobrazit plný text záznamu