Component-Resolved Determination of the Magnetization by Magnetization-Induced Optical Second Harmonic Generation

Published

March 31, 2006

Author(s)

Thomas Gerrits, Thomas J. Silva, Hugo A. van den Berg, Theo Rasing

Abstract

We present a method for simultaneous measuring the two normalized in-plane magnetization components in magnetic thin films that allows for the reconstruction of the magnetization angle and the normalized value of the magnetization with subnanosecond temporal resolution. The calibrated method relies on the large contrast associated with magnetization-induced optical second-harmonic generation, permitting measurements with a dynamic range in excess of 25 dB. Calibration is achieved by the determination of the relative magnitude and phase of the essential nonlinear optical tensor components, including those of a magneto-optic origin. Ellipsometric determination of the polarization of the second-harmonic signal, when the magnetization is saturated along four in-plane Cartesian directions, is sufficient to determine the second-order nonlinear tensor components. These four directions represent the two saturated states along the longitudinal and transverse directions of the magnetization, respectively. The tensor components are subsequently used to uniquely determine the in-plane magnetization amplitude and direction.

Citation

Review of Scientific Instruments

Volume

77

Pub Type

Journals

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Keywords

coherent precession, magnetization reversal, MSHG, vector resolved magnetization dynamics

Citation

Gerrits, T. , Silva, T. , van den Berg, H. and Rasing, T. (2006), Component-Resolved Determination of the Magnetization by Magnetization-Induced Optical Second Harmonic Generation, Review of Scientific Instruments, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=31989 (Accessed October 14, 2025)