Investigation of exchange coupled bilayer Fe/CuMnAs by pump-probe experiment

Saidl, V. and Němec, P. and Wadley, P. and Edmonds, K.W. and Campion, R.P. and Novák, V. and Gallagher, B.L. and Trojánek, F. (2017) Investigation of exchange coupled bilayer Fe/CuMnAs by pump-probe experiment. Physica Status Solidi. Rapid Research Letters, 11 (4). pp. 1-5. ISSN 1862-6270

[img] PDF - Repository staff only until 21 February 2018. - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (262kB)

Abstract

Time-resolved pump-probe magneto-optical method was used to study Fe/CuMnAs bilayer. The probe polarization dependence was used to identify and separate parts of detected signals due to Faraday and Voigt magneto-optical effects that provide information about pump-induced magnetization precession in ferromagnetic (FM) Fe and demagnetization in antiferromagnetic (AF) CuMnAs layers, respectively. We observed a 180 deg phase shift in the precession signal at non-zero magnetic field that we interpreted as a signature of the magnetic anisotropy induced in the FM by the adjacent AF layer. Unlike in x-ray magnetic linear dichroism experiments, we did not observe any significant reorientation of magnetic moments in CuMnAs by external magnetic field due to the interlayer exchange coupling with Fe. Differences between these two experimental techniques, providing the distinct pictures, are discussed.

Item Type: Article
Additional Information: This is the peer reviewed version of the following article: aidl, V., Němec, P., Wadley, P., Edmonds, K. W., Campion, R. P., Novák, V., Gallagher, B. L., Trojánek, F. and Jungwirth, T. (2017), Investigation of exchange coupled bilayer Fe/CuMnAs by pump–probe experiment. Physica Status Solidi RRL, 11, which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/pssr.201600441. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Keywords: exchange coupling, antiferromagnets, CuMnAs, Fe, ultrafast laser spectroscopy, pump–probe technique
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Physics and Astronomy
Identification Number: 10.1002/pssr.201600441
Depositing User: Eprints, Support
Date Deposited: 28 Apr 2017 08:44
Last Modified: 01 May 2017 08:43
URI: http://eprints.nottingham.ac.uk/id/eprint/42392

Actions (Archive Staff Only)

Edit View Edit View