Plasmon-induced demagnetization and magnetic switching in nickel nanoparticle arrays

被引：17
|
作者：
Kataja, Mikko [1 ]
Freire-Fernandez, Francisco [1 ]
Witteveen, Jorn P. [1 ]
Hakala, Tommi K. [2 ]
Torma, Paivi [2 ]
van Dijken, Sebastiaan [1 ]
机构：
[1] Aalto Univ, Sch Sci, Dept Appl Phys, NanoSpin, POB 15100, FI-00076 Aalto, Finland
[2] Aalto Univ, Dept Appl Phys, COMP Ctr Excellence, FI-00076 Aalto, Finland
来源：
APPLIED PHYSICS LETTERS | 2018年 / 112卷 / 07期
基金：
芬兰科学院; 欧洲研究理事会;
关键词：
TUNABLE MAGNETOOPTICAL ACTIVITY; SURFACE LATTICE RESONANCES;
D O I：
10.1063/1.5012857
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report on the manipulation of magnetization by femtosecond laser pulses in a periodic array of cylindrical nickel nanoparticles. By performing experiments at different wavelengths, we show that the excitation of collective surface plasmon resonances triggers demagnetization in zero field or magnetic switching in a small perpendicular field. Both magnetic effects are explained by plasmon-induced heating of the nickel nanoparticles to their Curie temperature. Model calculations confirm the strong correlation between the excitation of surface plasmon modes and laser-induced changes in magnetization. Published by AIP Publishing.
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页数：5
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