Lee Seung-Kyun, Hahn Erwin L, Clarke John
Department of Physics, University of California, Berkeley, California 94720-7300, USA.
Phys Rev Lett. 2006 Jun 30;96(25):257601. doi: 10.1103/PhysRevLett.96.257601. Epub 2006 Jun 28.
We demonstrate that protons in a liquid acquire a static polarization perpendicular to the plane of a rotating magnetic field. The rotating field was reduced adiabatically to zero, transforming the static polarization in the rotating frame to the laboratory frame. The application of a small magnetic field perpendicular to the polarization induced a free induction decay (FID) that was detected by a superconducting quantum interference device. The results agree with the predictions of the modified Bloch equations. The FID remained observable in the presence of magnetic material, suggesting that this technique may find practical applications.
