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Review of Scientific Instruments : Benchtop time-resolved magneto-optical Kerr magnetometer

By Anjan Barman, T. Kimura, Y. Otani, Y. Fukuma, K. Akahane et al

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Book Id: WPLBN0002169709
Format Type: PDF eBook :
File Size: Serial Publication
Reproduction Date: 23 December 2008

Title: Review of Scientific Instruments : Benchtop time-resolved magneto-optical Kerr magnetometer  
Author: Anjan Barman, T. Kimura, Y. Otani, Y. Fukuma, K. Akahane et al
Volume: Issue : December 2008
Language: English
Subject: Science, Physics, Natural Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Review of Scientific Instruments Collection
Historic
Publication Date:
Publisher: American Institute of Physics

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T. Kimura, Y. Otani, Y. Fukuma, K. Akahane Et A, A. B. (n.d.). Review of Scientific Instruments : Benchtop time-resolved magneto-optical Kerr magnetometer. Retrieved from http://hawaiilibrary.net/


Description
Description: We present here the construction and application of a compact benchtop time-resolved Kerr magnetometer to measure the magnetization precession in magnetic thin films and lithographically patterned elements. As opposed to very expensive femtosecond lasers this system is built upon a picosecond pulsed injection diode laser and electronic pulse and delay generators. The precession is triggered by the electronic pulses of controlled duration and shape, which is launched onto the sample by a microstrip line. We used polarized optical pulses synchronous to the electronic pulses to measure the magneto-optical Kerr rotation. The system is integrated in a conventional upright microscope configuration with separate illumination, imaging, and magneto-optical probe paths. The system offers high stability, relative ease of alignment, sample changing, and a long range of time delay. We demonstrate the measurements of time-resolved dynamics of a Permalloy microwire and microdot using this system, which showed dynamics at two different time scales.

 

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