Interlayer exchange coupling modulated all-optical magnetic switching in synthetic ferrimagnetic heterostructures

被引：5
作者：
Wang, Jian [1 ]
Sugimoto, Satoshi [1 ]
Kasai, Shinya [1 ]
Takahashi, Yukiko K. [1 ]
机构：
[1] Natl Inst Mat Sci, 1-2-1 Sengen, Tsukuba, Ibaraki 3050047, Japan
来源：
JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2020年 / 53卷 / 47期
关键词：
all-optical magnetic switching; interlayer exchange coupling; synthetic ferrimagnetic heterostructure; all-optical magnetic recording; THIN-FILMS; REVERSAL;
D O I：
10.1088/1361-6463/ababd0
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
All-optical magnetic switching in ferromagnetic thin films reveals an unprecedented route to manipulate magnetic configurations for future ultrafast and energy-efficient magnetic storage. In this study, the relationship between the all-optical magnetic switching and interlayer exchange coupling was investigated in a [Co/Pt](n)/Ru/GdFeCo synthetic ferrimagnetic heterostructure. While a thermal demagnetization is dominant in a single GdFeCo alloy film after laser sweep, the magneto-optical interaction transits to a clear all-optical magnetic switching after GdFeCo film being exchange coupled with a [Co/Pt](n)multilayer. Meanwhile, the established interlayer exchange coupling can also significantly increase the optical-induced magnetization switching ratio in [Co/Pt](n)multilayer after single-pulse laser illumination. A threshold interlayer exchange coupling strength of similar to 0.31 erg cm(-2)was confirmed for achieving a deterministic (similar to 90%) optical-induced magnetization switching ratio after multi-pulse laser illumination. This study demonstrates a clear correlation between interlayer exchange coupling and all-optical magnetic switching, offering a promising engineering pathway for high density all-optical magnetic recording.
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页数：7
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