New NIST measurements address response of media to rapidly changing magnetic fields as encountered in magnetic recording. (News Briefs).(National Institute of Standards and Technology)(Brief Article) From: Journal of Research of the National Institute of Standards andTechnology | Date: September 1, 2001 | COPYRIGHT 2001 National Institute of Standards and Technology. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group.Copyright information

NIST scientists have made quantitative, vectorial measurements of magnetization dynamics of Ni-Fe magnetic thin films, simultaneously at the surface and approximately 50 nm in the interior. The measurements were performed using the linear and non-linear magneto-optical Kerr effects. These measurements address the problem of the inhomogeneous magnetization response of magnetic materials when subjected to rapidly changing magnetic fields.

When the rate of change of the app...