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Limit on the electron electric dipole moment in gadolinium-iron garnet
B J Heidenreich1, O T Elliott, N D Charney
1Physics Department, Amherst College, Amherst, Massachusetts 01002, USA.
Abstract:
A new method for the detection of the electron electric dipole moment (EDM) using a solid is described. The method involves the measurement of a voltage induced across the solid by the alignment of the sample's magnetic dipoles in an applied magnetic field, H. A first application of the method to GdIG has resulted in a limit on the electron EDM of 5 x 10(-24)e cm, which is a factor of 40 below the limit obtained from the only previous solid-state EDM experiment. The result is limited by the imperfect discrimination of an unexpectedly large voltage that is even upon the reversal of the sample magnetization.
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