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 ∼0.31 erg cm −2 was confirmed for achieving a deterministic (∼90%) optical...

中文翻译：

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合成亚铁磁异质结构中的层间交换耦合调制全光磁开关

铁磁薄膜中的全光磁开关揭示了一种操纵磁结构的空前途径，可用于未来的超快和节能的磁存储。在这项研究中，在[Co / Pt] n / Ru / GdFeCo合成亚铁磁异质结构中研究了全光磁开关与层间交换耦合之间的关系。虽然在激光扫描后单个GdFeCo合金薄膜中热退磁占主导地位，但在交换GdFeCo薄膜与[Co / Pt] n多层膜后，磁光相互作用转变为清晰的全光学磁开关。同时，建立的层间交换耦合还可以显着提高单脉冲激光照射后[Co / Pt] n多层中的光致磁化转换比。