Terahertz Emission Spectroscopy of Exchange-Biased Spintronic Heterostructures: Single- and Double-Pump Techniques

被引：5

作者：

Saito, Yuichi ^{[1
]}

Kholid, Farhan N. ^{[1
]}

Karashtin, Evgeny ^{[2
,3
]}

Pashenkin, Igor ^{[2
]}

V. Mikhaylovskiy, Rostislav ^{[1
]}

机构：

[1] Univ Lancaster, Dept Phys, Lancaster LA1 4YB, England

[2] RAS, Fac Phys, Inst Phys Microstruct, Nizhnii Novgorod 603950, Russia

[3] Lobachevsky State Univ Nizhny Novgorod, Nizhnii Novgorod 603950, Russia

来源：

PHYSICAL REVIEW APPLIED | 2023年 / 19卷 / 06期

基金：

芬兰科学院;

关键词：

ULTRAFAST SPIN DYNAMICS; MAGNETIZATION ROTATION; TEMPERATURE;

D O I：

10.1103/PhysRevApplied.19.064040

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We show that terahertz (THz) emission spectroscopy is a method to probe the in-plane magnetic state in spintronic heterostructures with exchange bias between the constituent antiferromagnetic and ferromagnetic layers. We demonstrate that the intense laser excitation can switch and reversibly reset the direction of the pinning axis arising from the exchange bias in technologically relevant tunnel magnetoresistance elements. By applying the double-pump THz emission spectroscopy, we reveal that this switching exhibits a threshold character in the pump intensity.

引用

页数：9

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