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Magnetostriction with

Michelson Interferometer

Model: HO-ED-INT-06M

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 Examples

    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.

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
Specifications    (Electromagnet)

    Length of the coil    :    150 mm

    Winding material    :    Copper

    No. of turns    :    2508 nos.
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 Supply


    Optical Breadboard with Support

Model No: ED-INT-06M-BBS
Dimensions
:
800mm x 600mm
Material
:
Stainless Steel
Quantity
:
1 no.
Optical Breadboard with Support

    Kinematic Laser Mount

Model No: ED-INT-06M-KLM
Material
:
Black anodized Aluminum alloy
Adjustments
:
Using 80 tpi lead screws
Adjustment Range
:
+/-4 degrees
Quantity
:
1 no.
Kinematic Laser Mount

    Beamsplitter Mount

Model No: ED-INT-06M-BSM
Degrees of freedom
:
2 degrees
Material
:
Black anodized Aluminium alloy
Quantity
:
1 no.
Beamsplitter Mount

    Mirror Mount with Translation

Model No: ED-INT-06M-MMT
Degrees of freedom
:
3 degrees
Fine adjustments
:
Using 80 tpi lead screws
Material
:
Black anodized Aluminium alloy
Quantity
:
1 no.
Mirror Mount with Translation

    Electromagnet Coil with Mount

Model No: ED-INT-06M-ECM
Length of the Coil
:
3150 mm
Winding material
:
Copper
No. of turns
:
2508 nos.
Quantity
:
1 no.
Electromagnet Coil with Mount

    Specimen Rods (Iron, Nickel, Copper)

Model No: ED-INT-06M-SR
Length
:
185 mm
Diameter
:
6 mm
Quantity
:
1 no. each
Specimen Rods (Iron, Nickel, Copper)

    Screen with Mount

Model No: ED-INT-06M-SM
Dimension
:
75mm x 75mm
Quantity
:
1 no.
Screen with Mount

    Beamsplitter

Model No: ED-INT-06M-BS
Dimension
:
50 mm x 50 mm
Thickness
:
4 mm
R / T ratio
:
50 / 50
Material
:
N-BK7
Coating
:
Aluminium
Quantity
:
1 no.
Beamsplitter

    Mirror with Cell

Model No: ED-INT-06M-MC
Diameter
:
25 mm
Thickness
:
6 mm
Material
:
Borofloat
Coating
:
Aluminium
Quantity
:
2 nos.
Mirror with Cell

    Electromagnet Power supply

Model No: ED-INT-06M-EP
Current
:
0 - 4A
Quantity
:
1 no.
Electromagnet Power supply

    Diode Laser with Power supply (Red)

Model No: ED-INT-06-DLPR
Wave length
:
650 nm
Optical power
:
5 mW
Quantity
:
1 no.
Diode Laser with Power supply (Red)

    Accessories

User Manual
Allen keys
Thumb Screws
Dust Protective Cover

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