Probing ultrafast changes of spin and charge density profiles with resonant XUV magnetic reflectivity at the free-electron laser FERMI | Zendy

Christian Gutt | Zendy; Tushar Sant | Zendy; Dmitriy Ksenzov | Zendy; Flavio Capotondi | Zendy; Emanuele Pedersoli | Zendy; Lorenzo Raimondi | Zendy; I. Nikolov | Zendy; М. Кискинова | Zendy; Samridh Jaiswal | Zendy; G. Jakob | Zendy; Mathias Kläui | Zendy; H. Zabel | Zendy; U. Pietsch | Zendy

Open Access

Probing ultrafast changes of spin and charge density profiles with resonant XUV magnetic reflectivity at the free-electron laser FERMI

Author(s) -

Christian Gutt,

Tushar Sant,

Dmitriy Ksenzov,

Flavio Capotondi,

Emanuele Pedersoli,

Lorenzo Raimondi,

I. Nikolov,

М. Кискинова,

Samridh Jaiswal,

G. Jakob,

Mathias Kläui,

H. Zabel,

U. Pietsch

Publication year - 2017

Publication title -

structural dynamics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.415

H-Index - 29

ISSN - 2329-7778

DOI - 10.1063/1.4990650

Subject(s) - ultrashort pulse , extreme ultraviolet , laser , electron , condensed matter physics , spin (aerodynamics) , fermi level , physics , reflectivity , fermi gamma ray space telescope , atomic physics , materials science , optics , nuclear physics , thermodynamics

We report the results of resonant magnetic XUV reflectivity experiments performed at the XUV free-electron laser FERMI. Circularly polarized XUV light with the photon energy tuned to the Fe M 2,3 edge is used to measure resonant magnetic reflectivities and the corresponding Q -resolved asymmetry of a Permalloy/Ta/Permalloy trilayer film. The asymmetry exhibits ultrafast changes on 240 fs time scales upon pumping with ultrashort IR laser pulses. Depending on the value of the wavevector transfer Q z , we observe both decreasing and increasing values of the asymmetry parameter, which is attributed to ultrafast changes in the vertical spin and charge density profiles of the trilayer film.

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