Ultrafast demagnetization dynamics at the M edges of magnetic elements observed using a tabletop high-harmonic soft X-ray source

Medientyp: E-Artikel

Titel: Ultrafast demagnetization dynamics at the M edges of magnetic elements observed using a tabletop high-harmonic soft X-ray source

Beteiligte: La-O-Vorakiat, C. [Verfasser:in]; Siemens, M. [Verfasser:in]; Nembach, H. [Verfasser:in]; Silva, T.J. [Verfasser:in]; Murnane, M.M. [Verfasser:in]; Kapteyn, H.C. [Verfasser:in]; Mathias, S. [Verfasser:in]; Aelischmann, M. [Verfasser:in]; Grychtol, P. [Verfasser:in]; Adam, R. [Verfasser:in]; Schneider, C. M. [Verfasser:in]; Shaw, J.M. [Verfasser:in]

Erschienen: APS, 2009

Sprache: Englisch

DOI: https://doi.org/10.1103/PhysRevLett.103.257402

ISSN: 0031-9007

Schlagwörter:

Entstehung:

Anmerkungen: Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen.

Beschreibung: We use few-femtosecond soft x-ray pulses from high-harmonic generation to extract element-specific demagnetization dynamics and hysteresis loops of a compound material for the first time. Using a geometry where high-harmonic beams are reflected from a magnetized Permalloy grating, large changes in the reflected intensity of up to 6% at the M absorption edges of Fe and Ni are observed when the magnetization is reversed. A short pump pulse is used to destroy the magnetic alignment, which allows us to measure the fastest, elementally specific demagnetization dynamics, with 55 fs time resolution. The use of high harmonics for probing magnetic materials promises to combine nanometer spatial resolution, elemental specificity, and femtosecond-to-attosecond time resolution, making it possible to address important fundamental questions in magnetism.

Zugangsstatus: Freier Zugang

Nur in Feld suchen:

Zuletzt gesuchte Begriffe: