Interferometry
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.
Fig:- Magnetostriction of different ferromagnetic materials with their relative change in length Δl plotted against applied magnetic field strength Hm
Scope of Supply
Model No: ED-INT-06M-BBS
Dimensions : 800 x 600 mm
Material : Stainless Steel
Quantity : 1 no.
Model No: ED-INT-06M-KLM
Material : Black anodized Aluminum alloy
Adjustments : Using 80 tpi lead screws
Adjustment Range : +/-4 degrees
Quantity : 1 no.
Model No: ED-INT-06M-BSM
Degrees of freedom : 2 degrees
Material : Black anodized Aluminium alloy
Quantity : 1 no.
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.
Model No: ED-INT-06M-ECM
Length of the Coil : 3150 mm
Winding material : Copper
No. of turns : 2508 nos.
Quantity : 1 no.
Model No: ED-INT-06M-SR
Length : 185 mm
Diameter : 6 mm
Quantity : 1 no. each
Model No: ED-INT-06M-SM
Dimension : 75 x 75 mm
Quantity : 1 no.
Model No: ED-INT-06M-BS
Dimension : 50 x 50 mm
Thickness : 4 mm
R / T ratio : 50 / 50
Material : N-BK7
Coating : Aluminium
Quantity : 1 no.
Model No: ED-INT-06M-MC
Diameter : 25 mm
Thickness : 6 mm
Material : Borofloat
Coating : Aluminium
Quantity : 2 nos.
Model No: ED-INT-06M-EP
Current : 0 - 4A
Quantity : 1 no.
Model No: ED-INT-06-DLPR
Wave length : 650 nm
Optical power : 5 mW
Quantity : 1 no.
Thumb Screws
Allen keys
Dust Protective Cover
Instruction Manual
Established in 1993, Holmarc Opto-Mechatronics Ltd manufactures variety of scientific and engineering instruments for research, industry and education.
ISO 9001:2015 Made in INDIA
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H.M.T. P.O, Kalamassery, Kochi
Kerala, India - 683 503
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sales@holmarc.com
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