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Terahertz emission spectroscopy of ultrafast demagnetization in iron

David J. Hilton, Richard D. Averitt, Joe D. Thompson, Chad A. Meserole, David J. Funk, Greg L. Fisher, and Antoinette J. Taylor

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Abstract

We have observed ultrafast demagnetization of ferromagnetic metals after femtosecond pump pulse excitation by both terahertz transmission and emission spectroscopy. We observe demagnetization occurring in iron with a 2 ps time constant.

© 2005 Optical Society of America

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