Magnetostriction in Soft Iron Rod Using Michelson Interferometer
Objective
To determine the phenomenon of magnetostriction in a metallic soft iron rod using a Michelson Interferometer. The experiment enables the measurement of extremely small changes in the length of the rod when subjected to a magnetic field, demonstrating the relationship between magnetization and dimensional change in ferromagnetic materials.
Experimental Setup
The complete setup includes the following components:
Michelson Interferometer Assembly comprising precision mirrors and a beam splitter for generating interference fringes.
Special Mirror Assembly with Solenoid and Soft Iron Rod, designed to observe the minute displacement caused by magnetostriction.
Diode Laser with mounting stand and regulated power supply, providing a stable and coherent light source.
10× Objective Lens with mounting arrangement for improved observation and fringe visibility.
Support Stand for Solenoid to ensure accurate alignment during experimentation.
Observation Screen with Stand for clear viewing of interference patterns.
Dedicated Power Supply for the Solenoid to generate the required magnetic field around the soft iron rod.
Description
This experimental setup is designed to study magnetostriction, a property of ferromagnetic materials in which their dimensions change when exposed to a magnetic field. The highly sensitive Michelson Interferometer allows precise measurement of these extremely small length variations by observing shifts in the interference fringes.
The apparatus provides students and researchers with a practical understanding of interferometry, magnetic properties of materials, and precision optical measurement techniques. It is widely used in advanced physics laboratories for experiments related to optics, electromagnetism, and material science.
