Insights on induced magnetic moments and spin textures in synthetic ferrimagnetic Pt/Co/Gd heterolayers

• DOI: 10.48550/arxiv.2404.04655
• Publication Date: 2024-04-06
• Authors: J. Brandão; P. C. Carvalho; I. P. Miranda; Thiago J. A. Mori; Fanny Béron; Anders Bergman; Helena M. Petrilli; A. B. Klautau; J. C. Cezar
• Keywords: Ferrimagnetism

To develop new devices based on synthetic ferrimagnetic (S-FiM) heterostructures, understanding the material's physical properties is pivotal. Here, induced magnetic moment (IMM), exchange-coupling, and spin textures were investigated at room-temperature in Pt/Co/Gd multilayers using a multiscale approach. The magnitude direction of IMM interpreted experimentally theoretically framework both X-ray circular dichroism (XMCD) density functional theory (DFT). results demonstrate that transferred by Co across Gd paramagnetic (PM) thickness leads to flipped state (FSS) within layers, which their moments couple antiparallel/parallel with ferromagnetic (FM) near/far from Co/Gd interface, respectively. For Pt, Pt/Co Gd/Pt interfaces follows same as moment, negligible interface. Additionally, zero-field spirals imaged scanning transmission microscopy (STXM), while micromagnetic simulations employed unfold interactions stabilizing FiM configurations, where existence sizable Dzyaloshinskii-Moriya interaction demonstrated be crucial for formation those textures. Our outcomes may add fundamental technological aspects films antiferromagnetic spintronic devices.