The role of Pt underlayer on the magnetization dynamics of perpendicular magnetic anisotropy Pt/Co2FeAl0.5Si0.5/MgO

被引：4
|
作者：
Besbas, Jean [1 ]
Loong, Li Ming [1 ]
Wu, Yang [1 ]
Yang, Hyunsoo [1 ]
机构：
[1] Natl Univ Singapore, Dept Elect & Comp Engn, NUSNNI, Singapore 11757, Singapore
来源：
APPLIED PHYSICS LETTERS | 2016年 / 108卷 / 23期
基金：
新加坡国家研究基金会;
关键词：
SPIN; NICKEL; FILMS;
D O I：
10.1063/1.4953587
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We investigate the role of Pt on the magnetization dynamics of Pt/Co2FeAl0.5Si0.5/MgO with perpendicular magnetic anisotropy using the time resolved magneto-optic Kerr effect. Pt/Co2FeAl0.5Si0.5/MgO shows ultrafast magnetization dynamics comparable to 3d ferromagnets and can be fully demagnetized. The demagnetization time tau(d) similar to 0.27 ps and magnetic heat capacity are independent of the Pt underlayer, whereas the value of the electron-phonon coupling time tau(e) similar to 0.77 ps depends on the presence of the Pt layer. We further measure the effective damping alpha(eff) similar to 1 that does not scale as the inverse demagnetization time (1/tau(d)), but is strongly affected by the Pt layer. Published by AIP Publishing.
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页数：5
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