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Electrical characterization of all-optical helicity-dependent switching in ferromagnetic Hall crosses

Authors :
Nicolas Bergeard
Gregory Malinowski
Michel Hehn
Charles-Henri Lambert
Philipp Pirro
Stéphane Mangin
Yassine Quessab
M. S. El Hadri
François Montaigne
Sébastien Petit-Watelot
Eric E. Fullerton
Rajasekhar Medapalli
Institut Jean Lamour (IJL)
Institut de Chimie du CNRS (INC)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)
Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS)
Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE)
Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique
Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)
Center for Magnetic Recording Research
University of California [San Diego] (UC San Diego)
University of California-University of California
Source :
Applied Physics Letters, Applied Physics Letters, American Institute of Physics, 2016, 108, pp.92405-153905. ⟨10.1063/1.4943107⟩
Publication Year :
2016
Publisher :
AIP Publishing, 2016.

Abstract

We present an experimental study of all-optical helicity-dependent switching (AO-HDS) of ferromagnetic Pt/Co/Pt heterostructures with perpendicular magnetic anisotropy. The sample is patterned into a Hall cross and the AO-HDS is measured via the anomalous Hall effect. This all-electrical probing of the magnetization during AO-HDS enables a statistical quantification of the switching ratio for different laser parameters, such as the threshold power to achieve AO-HDS and the exposure time needed to reach complete switching at a given laser power. We find that the AO-HDS is a cumulative process, a certain number of optical pulses is needed to obtain a full and reproducible helicity-dependent switching. The deterministic switching of the ferromagnetic Pt/Co/Pt Hall cross provides a full “opto-spintronic device,” where the remanent magnetization can be all-optically and reproducibly written and erased without the need of an external magnetic field.

Details

ISSN :
10773118 and 00036951
Volume :
108
Database :
OpenAIRE
Journal :
Applied Physics Letters
Accession number :
edsair.doi.dedup.....2a72ecebbc24e1e59349f8cb8603863f
Full Text :
https://doi.org/10.1063/1.4943107