One of the interesting phenomena associated with ferro and ferri magnetic materials is their magnetostriction. That is, these materials undergo a change in dimension when their state of magnetization is changed by an applied magnetic field. This paper describes one of the experimental setups for the accurate measurement of magnetostriction. We measured the magnetostriction of polycrystalline NiFe{sub}2O{sub}4 samples with this setup and the results agree well with the standard values. This setup may be modified to be used as an optical modulator. Research using this setup can study the magnetostriction of different materials and to develop new devices for optical communication.
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