Laser‐induced magnetisation dynamics in La0.7Sr0.3MnO3/SrRuO3 superlattices. Issue 10 (16th September 2015)

• Record Type: Journal Article
• Authors: Razdolski, Ilya; Subkhangulov, Ruslan R.; Gheorghe, Diana G.; Bern, Francis; Vrejoiu, Ionela; Kimel, Alexey V.; Kirilyuk, Andrei; Ziese, Michael; Rasing, Theo
• Is Part Of: Physica status solidi. Volume 9:Issue 10(2015:Oct.)
• Page Start: 583
• Page End: 588
• Publication Date: 2015-09-16
• Subjects: Solid state physics -- Periodicals; 530.4105
• DOI: 10.1002/pssr.201510272
• Languages: English
• ISSNs: 1862-6254

Abstract

<abstract abstract-type="main" id="pssr201510272-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p>Laser‐induced magnetisation dynamics of a La_0.7Sr_0.3MnO₃/SrRuO₃ superlattice is studied by means of a single‐colour optical pump‐probe technique. Significant differences in the magnetisation dynamics of a superlattice with respect to the single layers of constituent materials are demonstrated. Below the Curie temperature <italic>T</italic>_C of SrRuO₃, laser‐induced ultrafast demagnetisation is found to be followed by a uniform precession of the magnetisation around its new equilibrium. The data is described within a simple model based on a displacive excitation of a precessional magnetisation dynamics. The model is shown to give a good fit to the experimental data. As the initial temperature approaches <italic>T</italic>_C, the oscillations get suppressed and eventually vanish. The magnetisation dynamics is shown to depend on whether the two distinct magnetisation vectors in the superlattice are ferromagnetically or antiferromagnetically aligned. (© 2015 WILEY‐VCH Verlag GmbH &amp;Co. KGaA, Weinheim)</p> </abstract>