Deterministic all-optical magnetization writing facilitated by non-local transfer of spin angular momentum

Youri L.W. van Hees (Corresponding author), Paul van de Meugheuvel, Bert Koopmans, Reinoud Lavrijsen

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

Samenvatting

Ever since its discovery around a decade ago, all-optical magnetization switching (AOS) using femtosecond laser pulses has shown potential for future data storage and logic devices. In particular, single pulse helicity independent AOS in certain ferrimagnetic alloys and multilayers is highly efficient and ultrafast. However, in most cases it is a toggle mechanism, which is not desirable for applications. Here we experimentally demonstrate conversion from toggle switching to a deterministic mechanism by biasing AOS in a Co/Gd bilayer with a spin polarized current which is optically generated in an adjacent ferromagnetic reference layer. We show deterministic writing of an ‘up’ and ‘down’ state using a sequence of one or two pulses, respectively, and demonstrate the non-local origin by varying the magnitude of the generated spin current. Our demonstration of deterministic magnetization writing could provide an essential step towards the implementation of future optically addressable spintronic memory devices.

Originele taal-2Engels
Artikelnummer3835
Aantal pagina's7
TijdschriftNature Communications
Volume11
Nummer van het tijdschrift1
DOI's
StatusGepubliceerd - 31 jul 2020

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