Size effect on single pulse all-optical helicity-independent switching in GdFeCo disk arrays

被引：0

作者：

Nyoma, Danny Petty Gweha ^{[1
]}

Verges, Maxime ^{[1
]}

Hehn, Michel ^{[1
]}

Lacour, Daniel ^{[1
]}

Hohlfeld, Julius ^{[1
]}

van Dijken, Sebastiaan ^{[2
]}

Malinowski, Gregory ^{[1
]}

Mangin, Stephane ^{[1
]}

Montaigne, Francois ^{[1
]}

机构：

[1] Univ Lorraine, CNRS, IJL, F-54000 Nancy, France

[2] Aalto Univ, Dept Appl Phys, NanoSpin, Sch Sci, FI-00076 Aalto, Finland

来源：

APPLIED PHYSICS LETTERS | 2023年 / 123卷 / 05期

基金：

欧盟地平线“2020”; 芬兰科学院;

关键词：

MAGNETIZATION REVERSAL; SPIN DYNAMICS; THIN-FILMS; ULTRAFAST;

D O I：

10.1063/5.0150250

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We experimentally demonstrate single pulse toggle switching of the magnetization of GdFeCo disks with perpendicular to film plane anisotropy, which diameter ranges from 3 mu m to 400 nm using 35 fs linearly polarized laser pulses. Two different magnetic states can be observed depending on the laser fluence: either a deterministic switching of the disk magnetization or a randomly oriented disk. We report that the fluence required to observe both magnetic states show a non-monotonic behavior with disk diameter and that the smallest disks require the lowest minimum fluence for achieving single pulse all-optical helicity-independent switching. Different evolution of the fluence thresholds for both phenomenon as a function of the disk size is observed and discussed.

引用

页数：6

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