Simultaneous measurement of "eld dependence of elastic moduli by laser interferometry
Simultaneous measurement of "eld dependence of elastic moduli by laser interferometry
- Journal of Magnetism and Magnetic Materials, 219(2), p.229-235, 2000 .
A methodology is applied which allows the simultaneous determination of Young's modulus and the shear modulus to evaluate elastic moduli variations with the magnetic "eld (*E and *G). The method employed is based on the simultaneous detection of the transverse and torsional natural frequencies of a slender magnetic bar located within a solenoid. The resultant vibration is detected via a heterodyne interferometric optical system with a broad bandwidth. The vibration detection and excitation systems do not interact with the sample. The applicability of the method is demonstrated by characterizing 10-mm-diameter nickel bars. The results are compared with those obtained from longitudinal vibrations.
MAGNETOSTRICTION
ELASTIC CONSTANTS
RESONANCE
INTERFEROMETRY
SPECKLE
A methodology is applied which allows the simultaneous determination of Young's modulus and the shear modulus to evaluate elastic moduli variations with the magnetic "eld (*E and *G). The method employed is based on the simultaneous detection of the transverse and torsional natural frequencies of a slender magnetic bar located within a solenoid. The resultant vibration is detected via a heterodyne interferometric optical system with a broad bandwidth. The vibration detection and excitation systems do not interact with the sample. The applicability of the method is demonstrated by characterizing 10-mm-diameter nickel bars. The results are compared with those obtained from longitudinal vibrations.
MAGNETOSTRICTION
ELASTIC CONSTANTS
RESONANCE
INTERFEROMETRY
SPECKLE