London-Moment

The London moment is named after the physicist Fritz London quantum mechanical phenomenon that a superconductor possesses a magnetic moment, which depends only on the nature of the charge carriers, not the shape, size and band structure of Köpers, and rotation creates a magnetic field whose orientation with the rotation axis of the superconductor coincides.

The magnetic field strength of the rotating superconductor

M and Q for mass and charge of the charge carriers of the superconducting phase, for the Cooper pairs so M = and Q = 2me 2e.

One application is the reaction- poor detection of the rotation axis of gyroscopes in Gravity, Gravity Probe B. see