Ultrafast magnetic switching of GdFeCo with electronic heat currents

被引：46
|
作者：
Wilson, R. B. [1 ,2 ]
Gorchon, Jon [3 ,4 ]
Yang, Yang [5 ]
Lambert, Charles-Henri [3 ]
Salahuddin, Sayeef [3 ,4 ]
Bokor, Jeffrey [3 ,4 ]
机构：
[1] Univ Calif Riverside, Dept Mech Engn, Riverside, CA 92521 USA
[2] Univ Calif Riverside, Mat Sci & Engn Program, Riverside, CA 92521 USA
[3] Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA
[4] Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA
[5] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA
来源：
PHYSICAL REVIEW B | 2017年 / 95卷 / 18期
基金：
美国国家科学基金会;
关键词：
SPIN CURRENT; DEMAGNETIZATION; EXCITATION; REVERSAL; DRIVEN; FILMS;
D O I：
10.1103/PhysRevB.95.180409
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report the magnetic response of Pt/Au/GdFeCo trilayers to optical irradiation of the Pt surface. For trilayers with Au thickness greater than 50 nm, the great majority of energy is absorbed by the Pt layer, creating an initial temperature differential of thousands of kelvin between the Pt/Au layers and the GdFeCo layer. The resulting electronic heat current across the metal multilayer lasts for several picoseconds with energy flux in excess of 2 TWm(-2) and provides sufficient heating to the GdFeCo electrons to induce deterministic reversal of the magnetic moment.
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页数：5
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