Limit on the Electron Electric Dipole Moment Using Paramagnetic Ferroelectric
Authors:
- S. EckelSES. Eckel
- A. O. SushkovASA. O. Sushkov
- S. K. LamoreauxSLS. K. Lamoreaux
- 8 November 2012
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 109 (19) , 193003
Abstract
We report on the results of a search for the electron electric dipole moment de using paramagnetic ferroelectric Eu0.5Ba0.5TiO3. The electric polarization creates an effective electric field that makes it energetically favorable for the spins of the seven unpaired 4f electrons of the Eu2+ to orient along the polarization, provided that de$\ne${}0. This interaction gives rise to sample magnetization, correlated with its electric polarization, and is therefore equivalent to a linear magnetoelectric effect. A SQUID magnetometer is used to search for the resulting magnetization. We obtain de=(-1.07\ifmmode\pm\else\textpm\fi{}3.06stat\ifmmode\pm\else\textpm\fi{}1.74syst)\ifmmode\times\else\texttimes\fi{}10-25\,\,ecm, implying an upper limit of |de|<6.05\ifmmode\times\else\texttimes\fi{}10-25\,\,ecm (90% confidence).Keywords
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This publication has 23 references indexed in Scilit:
- Improved measurement of the shape of the electronNature, 2011
- Improved Limit on the Permanent Electric Dipole Moment ofPhysical Review Letters, 2009
- Sensitivity of condensed-matter- and-violation experimentsPhysical Review A, 2006
- New Limit on the Electron Electric Dipole MomentPhysical Review Letters, 2002
- CP Violation Without Strangeness1997
- Baryon asymmetry of the Universe in the standard modelPhysical Review D, 1994
- Violation of CP in variance, C asymmetry, and baryon asymmetry of the universeSoviet Physics Uspekhi, 1991
- The electric dipole moment of the electronReviews of Modern Physics, 1991
- ELECTRIC DIPOLE MOMENTS OF ELEMENTARY PARTICLESSoviet Physics Uspekhi, 1968
- The Theory of Quantized Fields. IPhysical Review B, 1951