Calibration and characterisation with a new laser-based magnetostriction measurement system
Rafferty, AranORCID: 0000-0001-6388-7735, Bakir, S., Brabazon, DermotORCID: 0000-0003-3214-6381 and Prescott, Tim
(2009)
Calibration and characterisation with a new laser-based magnetostriction measurement system.
Materials & Design, 30
(5).
pp. 1680-1684.
ISSN 0261-3069
A laser-based magnet measurement system has been developed to measure the magnetostrictive strain of large cylindrical samples. The measurement system incorporates a solenoid capable of generating a maximum magnetic field intensity of 3000 Oe and a laser displacement sensor. For calibration and evaluation purposes, the positive magnetostrictions of two different types of giant magnetostrictive Tb–Dy–Fe-based materials were accessed with this system. A magnetostrictive strain of 622 ppm was obtained at 3000 Oe for TbxDy1-xFe2-y, compared with 725 ppm for Tb0.27Dy0.73Fe2. A rod of sintered cobalt ferrite was also measured. This exhibited negative magnetostriction, with a maximum contraction of 260 ppm at 3000 Oe.
Metadata
Item Type:
Article (Published)
Refereed:
Yes
Uncontrolled Keywords:
Magnetostriction; Magnetic field strength; Terfenol-D; Cobalt ferrite