Investigation of magneto-structural phase transition in FeRh by reflectivity and transmittance measurements in visible and near-infrared spectral region. (3rd August 2016)

• Record Type: Journal Article
• Authors: Saidl, V; Brajer, M; Horák, L; Reichlová, H; Výborný, K; Veis, M; Janda, T; Trojánek, F; Maryško, M; Fina, I; Marti, X; Jungwirth, T; Němec, P
• Is Part Of: New journal of physics. Volume 18:Number 8(2016:Aug.)
• Publication Date: 2016-08-03
• Subjects: antiferromagnet -- phase transition -- optical permittivity; Physics -- Periodicals; Physics; Periodicals; 530.05
• DOI: 10.1088/1367-2630/18/8/083017
• Languages: English
• ISSNs: 1367-2630

Abstract

Abstract: Magneto-structural phase transition in FeRh epitaxial layers was studied optically. It is shown that the transition between the low-temperature antiferromagnetic phase and the high-temperature ferromagnetic phase is accompanied by a rather large change of the optical response in the visible and near-infrared spectral ranges. This change is consistent with ab initio calculations of reflectivity and transmittance. Phase transition temperatures in a series of FeRh films with thicknesses ranging from 6 to 100 nm is measured thereby demonstrating the utility of the method to quickly characterise samples. Spatially resolved imaging of their magnetic properties with a micrometer resolution shows that the phase transition occurs at different temperatures in different parts of the sample.