Layer-dependence of macroscopic and atomic magnetic correlations in Co/Pd multilayers



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Gálvez, F. and Valle, J. del and Gómez Gutiérrez, Alicia and González Herrera, Elvira María and Navarro Palma, Elena and Vicent López, José Luis and Soriano, N. and Mora, B. and Rollano, V. and Gargiani, P. (2020) Layer-dependence of macroscopic and atomic magnetic correlations in Co/Pd multilayers. AIP advances, 10 (6). ISSN 2158-3226

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The development of multilayered materials with engineered magnetic properties compels a deep knowledge of physical properties at the atomic scale. The magnetic anisotropy is a key property in these materials. This work accounts for the magnetic anisotropy energy and its correlation with atomic properties of Co/Pd multilayers with the number of Co/Pd repetitions. Magnetometry measurements confirm stronger perpendicular magnetic anisotropy energies as the number of repetitions increases up to 40. However, the intrinsic anisotropy, related to the Co-Pd orbital hybridization and spin-orbit coupling, saturates at 15 repetitions. This finding is supported by x-ray magnetic circular dichroism analysis that reveals a direct correlation of the atomic Co and Pd orbital magnetic moments and the effective anisotropy of the system. The proximity effect that accounts for the Pd induced magnetization, along with the increasing Co moment, provides a suitable mechanism for the observed anisotropy energy layer dependence.

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©2020 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license
Artículo escrito por más de diez autores
This work received funding from the MINECO-AEI FIS2016-76058, UE FEDER "Una manera de hacer Europa"; the European Union's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie Grant No. 734801, and the Basque Country Grant Nos. IT1162-19 and PIBA 2018-11. UPV/EHU authors are thankful for the technical and human support provided by the laser facility, x-ray service, electron microscopy, and magnetic measurement units of SGIker UPV/EHU. We acknowledge the access to BL29 at ALBA synchrotron light facility via official Proposal No. 2015091407. M.V. acknowledges funding via MINECO [Grant No. FIS2016-78591-C3-2-R (AEI/FEDER, UE)]. IMDEA Nanociencia acknowledges the support from the "Severo Ochoa" Program for Centers of Excellence in R&D (MINECO, Grant No. SEV-2016-0686). R.M. acknowledges enlightening discussions with Dr. Arturo Ponce-Pedraza (UTSA) on TEM.

Uncontrolled Keywords:Circular-dichroism; Anisotropy; Co; Moments; Xmcd
Subjects:Sciences > Physics > Materials
Sciences > Physics > Solid state physics
ID Code:61960
Deposited On:11 Sep 2020 15:58
Last Modified:14 Jan 2022 12:25

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