Temperature Dependence of All-Optical Ultrafast Magnetization Switching in TbFeCo

Author

Cheng, T.Y. ; Wu, J. ; Willcox, M. ; Liu, T. ; Cai, J.W. ; Chantrell, R.W. ; Xu, Y.B.

Author_Institution

Dept. of Phys., Univ. of York, York, UK

Volume

48

Issue

11

fYear

2012

Firstpage

3387

Lastpage

3389

Abstract

Using a time-resolved pump-probe system, we experimentally demonstrated that all-optical magnetization switching in TbFeCo can be observed at both room temperature and a low temperature of 110 K. This switching can only be triggered by a circularly polarized pump beam within a very narrow range of pulse energies. We believe these findings will lead to a better understanding of optically induced magnetization reversal on rare-earth transition metal alloys and provide an ultrafast and efficient way for future magnetic recording technique.

Keywords

cobalt alloys; ferromagnetic materials; high-speed optical techniques; iron alloys; magnetic recording; magnetic switching; magnetisation reversal; terbium alloys; time resolved spectra; TbFeCo; all-optical ultrafast magnetization switching; circularly-polarized pump beam; ferromagnetic materials; magnetic recording; magnetization reversal; rare-earth transition metal alloys; temperature 110 K; temperature 293 K to 298 K; time-resolved pump-probe system; Demagnetization; Laser beams; Laser excitation; Magnetization; Optical switches; Power lasers; Pump lasers; TbFeCo; Temperature dependence; switching; ultrafast;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2012.2202313

Filename

6332999