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We have designed and fabricated an ex situ optical cantilever beam magnetometer to measure the magnetization and the magnetostriction of ferromagnetic materials. We discuss the working principle of a cantilever beam magnetometer and derive the theory of the cantilever bending due to magnetic torque acting on the sample attached to the cantilever substrate. We also present the results for bulk iron obtained using the cantilever beam magnetometer.
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Adhikari et al. (2012) studied this question.
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