New Experimental Limit on the Electric Dipole Moment of the Electron in a Paramagnetic Insulator

Abstract

We report results of an experimental search for the intrinsic Electric Dipole Moment (EDM) of the electron using a solid-state technique. The experiment employs a paramagnetic, insulating gadolinium gallium garnet (GGG) that has a large magnetic response at low temperatures. The presence of the eEDM would lead to a small but non-zero magnetization as the GGG sample is subject to a strong electric field. We search for the resulting Stark-induced magnetization with a sensitive magnetometer. Recent progress on the suppression of several sources of background allows the experiment to run free of spurious signals at the level of the statistical uncertainties. We report our first limit on the eEDM of $(-5.57\pm 7.98\pm 0.12)\times$10${}^{-25}$e$\cdot$cm with 5 days of data averaging.

9 pages, 9 figures, Revtex 4.1

References in corpus (5)

• Order of Magnitude Smaller Limit on the Electric Dipole Moment of the Electron
• Observation of Time Reversal Violation in the B0 Meson System
• A limit on the electron electric dipole moment using paramagnetic ferroelectric Eu${}_{0.5}$Ba${}_{0.5}$TiO${}_3$
• Towards the search of electron electric dipole moment: correlation calculations of the P,T-violation effect in the Eu${}^{++}$ cation
• A high dynamic range data acquisition system for a solid-state electron Electric Dipole Moment experiment

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• Polarizabilities as Probes for P, T, and PT Violation