钆铁石榴石中电子电偶极矩的限制

Limit on the electron electric dipole moment in gadolinium-iron garnet.

作者信息

Heidenreich B J, Elliott O T, Charney N D, Virgien K A, Bridges A W, McKeon M A, Peck S K, Krause D, Gordon J E, Hunter L R, Lamoreaux S K

机构信息

Physics Department, Amherst College, Amherst, Massachusetts 01002, USA.

出版信息

Phys Rev Lett. 2005 Dec 16;95(25):253004. doi: 10.1103/PhysRevLett.95.253004. Epub 2005 Dec 15.

DOI:10.1103/PhysRevLett.95.253004

PMID:16384457

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.

摘要

描述了一种使用固体检测电子电偶极矩（EDM）的新方法。该方法涉及测量在施加磁场H中样品磁偶极子排列在固体上感应出的电压。该方法首次应用于钆铁石榴石（GdIG），得到电子EDM的限值为5×10⁻²⁴e·cm，比之前唯一的固态EDM实验所得到的限值低40倍。该结果受到对即使在样品磁化反转时仍意外出现的大电压的不完全分辨的限制。