Single shot ultrafast all optical magnetization switching of ferromagnetic Co/Pt multilayers

Gorchon, Jon; Lambert, Charles-Henri; Yang, Yang; Pattabi, Akshay; Wilson, Richard B.; Salahuddin, Sayeef; Bokor, Jeffrey

doi:10.1063/1.4994802

Title: Single shot ultrafast all optical magnetization switching of ferromagnetic Co/Pt multilayers

Journal Article · Mon Jul 24 00:00:00 EDT 2017 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4994802· OSTI ID:1530292

^[1]; Lambert, Charles-Henri ^[2]; Yang, Yang ^[2]; Pattabi, Akshay ^[2]; Wilson, Richard B. ^[3]; Salahuddin, Sayeef ^[1];

^[1]

Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
Univ. of California, Berkeley, CA (United States)
Univ. of California, Riverside, CA (United States)

A single femto-second optical pulse can fully reverse the magnetization of a film within picoseconds. Such fast operation hugely increases the range of application of magnetic devices. However, so far, this type of ultrafast switching has been restricted to ferri-magnetic GdFeCo films. In contrast, all optical switching of ferro-magnetic films require multiple pulses, thereby being slower and less energy efficient. In this study, we demonstrate magnetization switching induced by a single laser pulse in various ferromagnetic Co/Pt multilayers grown on GdFeCo, by exploiting the exchange coupling between the two magnetic films. Table-top depth-sensitive time-resolved magneto-optical experiments show that the Co/Pt magnetization switches within 7 ps. Lastly, this coupling approach will allow ultrafast control of a variety of magnetic films, which is critical for applications.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1530292

Alternate ID(s):: OSTI ID: 1372411

Journal Information:: Applied Physics Letters, Vol. 111, Issue 4; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 48 works

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