NIST logo

Publication Citation: Direct Detection of Nonlinear Ferromagnetic Resonance in Thin Films by the Magneto-Optical Kerr Effect

NIST Authors in Bold

Author(s): Thomas Gerrits; Pavol Krivosik; Michael Schneider; C E. Patton; Thomas J. Silva;
Title: Direct Detection of Nonlinear Ferromagnetic Resonance in Thin Films by the Magneto-Optical Kerr Effect
Published: May 16, 2007
Abstract: The longitudinal magneto-optical Kerr effect is used to obtain a calibrated measure of the dynamic magnetization response over the ferromagnetic resonance (FMR) profile for in-plane magnetized Permalloy films excited with high power in-plane transverse microwave fields at 1.25 to 3.75 GHz and in-plane precession angles up to about 20°. The data provide a profound demonstration of the Suhl threshold effect for parametric spin wave generation for angles above about 14°, the magnetization precession lock-up just above threshold, and the complicated response over the full FMR profile at very high powers.
Citation: Physical Review Letters
Volume: 98
Issue: 207602
Pages: pp. 207602-1 - 207602-4
Keywords: ferromagnetic resonance;instability threshold;Magneto Optical Kerr Effect;Suhl instability
Research Areas: Electromagnetics
PDF version: PDF Document Click here to retrieve PDF version of paper (587KB)