Presentation	2014-07-17 All - optical magnetization switching induced by ultrashort heat pulse : relation with GdFeCo sub - lattice magnetization Hiroki YOSHIKAWA, Arata TSUKAMOTO, Akiyoshi ITOH,
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Abstract(in English)	Femtosecond laser pulse excitation of multi-sub-lattice rare-earth (RE) transition-metal (TM) ferrimagnets opens the way to trigger magnetization precessional motion and moreover all-optical magnetization switching (AOS). This AOS phenomena originated from sub-lattice nature is fundamentally different from conventional magnetic field driven switching mechanism. In this study, we show that the AOS efficiently works even near compensation composition ratio C_ or compensation temperature T_ that makes hardness to magnetic field driven net-magnetization (M_) reversal. Under the various conditions of M_, all optically created domain sizes were almost determined by only the condition of laser excitation. Furthermore, we suggested that the switching domain area can be estimated by a fluence threshold W_.
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Keyword(in English)	All-optical magnetization switching / Femtosecond pulse laser / Ferrimagnets / Thin film / Compensation point
Paper #	MR2014-10
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Committee	MR
Conference Date	2014/7/10(1days)
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Registration To	Magnetic Recording (MR)
Language	JPN
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Title (in English)	All - optical magnetization switching induced by ultrashort heat pulse : relation with GdFeCo sub - lattice magnetization
Sub Title (in English)
Keyword(1)	All-optical magnetization switching
Keyword(2)	Femtosecond pulse laser
Keyword(3)	Ferrimagnets
Keyword(4)	Thin film
Keyword(5)	Compensation point
1st Author's Name	Hiroki YOSHIKAWA
1st Author's Affiliation	Graduate School of Science and Technology, Nihon Univ.()
2nd Author's Name	Arata TSUKAMOTO
2nd Author's Affiliation	College of Science and Technology, Nihon Univ.
3rd Author's Name	Akiyoshi ITOH
3rd Author's Affiliation	College of Science and Technology, Nihon Univ.
Date	2014-07-17
Paper #	MR2014-10
Volume (vol)	vol.114
Number (no)	140
Page	pp.pp.-
#Pages	5
Date of Issue