TITLE

Ultrafast spin demagnetization by nonthermal electrons of TbFe alloy film

AUTHOR(S)
Ji-Wan Kim; Kyeong-Dong Lee; Jae-Woo Jeong; Sung-Chul Shin
PUB. DATE
May 2009
SOURCE
Applied Physics Letters;5/11/2009, Vol. 94 Issue 19, p192506
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
An ultrafast spin demagnetization process of an amorphous Tb35Fe65 alloy film has been investigated by means of an all-optical pump-probe technique. Interestingly, steplike demagnetization on a subpicosecond time scale is observed before a much slower change on a time scale of tens of picoseconds. The steplike demagnetization at the subpicosecond scale is explained by the extended three-temperature model considering the interaction between a nonthermal electron and a spin system. The characteristic of subpicosecond demagnetization of TbFe alloy film is expected to be very useful in the manipulation of the spin state in ultrafast regime.
ACCESSION #
39785798

 

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