HO-ED-INT-06M Magnetostriction with Michelson Interferometer
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Magnetostriction with
Michelson Interferometer
Holmarc's Model No:HO-ED-INT-06M, Magnetostriction with Michelson Interferometer uses two mirrors in a Michelson arrangement to obtain the interference pattern. Due to the magnetostrictive effect, one of the mirrors is shifted by variation in the magnetic field applied to the sample, and the shift in interference pattern is observed.
Ferromagnetic substances undergo so-called magnetic distortions, i.e, they exhibit lengthening or shortening parallel to the direction of magnetization. Such changes are termed positive or negative magnetostriction. In crystal anisotropy , magnetostriction is also ascribable to the spin-orbit mutual potential energy, as this is a function of direction of magnetization and the interatomic distances. Due to magnetostriction, which corresponds to a spontaneous distortion of the lattice, a Ferro magnet can reduce its total anisotropic and elastic energy.
Experiment
To study magnetostrictive properties of various materials (iron, nickel and copper)
Magnetostriction is a property of ferromagnetic materials that causes them to change their shape or dimensions during the process of magnetization.
The alteration in length Δl is obtained from the number of circular fringe changes; in the process the separation per circular fringe change alters by λ/2.
Δl = n. λ / 2
λ is the wavelength of laser used.
Specifications:
| Electromagnet | |
| Length of the coil | 150 mm |
| Winding material | Copper |
| No. of turns | 2508 nos. |
Features:
| Longitudinal magnetostriction is considered |
| Diode laser is used as light source |
| All materials used in this setup are of laboratory grade and are corrosion resistant |
Video - Please Click HERE
Related Topics:
| Magnetostriction - positive and negative magnetostriction |
| Ferro magnetism |
| Interference of light |
Fig:- Magnetostriction of different ferromagnetic materials with their relative change in length Δl plotted against applied magnetic field strength Hm
Scope of Delivery:
Thumb Screws
Allen keys
Dust Protective Cover
Instruction Manual