Tunable magnetic properties of monoatomic metal-oxide Fe/MgO multilayers

A. Kozioł-Rachwał, T. Ślęzak, K. Matlak, P. Kuświk, M. Urbaniak, F. Stobiecki, L. D. Yao, S. van Dijken, and J. Korecki
Phys. Rev. B 90, 045428 – Published 29 July 2014

Abstract

Metal-oxide [FeK/(MgO)L]N multilayers were grown on MgO(001) substrates for various integer numbers (K,L) of the Fe(001) and MgO(001) monolayers, respectively, and the number of repetitions N varied from 6 to 30. Room-temperature conversion electron Mössbauer spectroscopy (CEMS) measurements proved that the magnetic properties of these monoatomic multilayers were extremely sensitive to both the Fe and MgO sublayer thicknesses. A stable ferromagnetic state and a strong perpendicular magnetization component at room temperature were obtained by changing the sublayer thickness and the number of multilayer repetitions. The analysis of the CEMS spectra in correlation with the magneto-optic Kerr effect measurements indicated a complicated domain structure in this special type of metal-insulator material. The vortexlike domain structure was confirmed by micromagnetic simulations.

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  • Received 6 December 2013
  • Revised 28 April 2014

DOI:https://doi.org/10.1103/PhysRevB.90.045428

©2014 American Physical Society

Authors & Affiliations

A. Kozioł-Rachwał1,*, T. Ślęzak1, K. Matlak1, P. Kuświk2, M. Urbaniak2, F. Stobiecki2, L. D. Yao3, S. van Dijken3, and J. Korecki1,4

  • 1Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland
  • 2Institute of Molecular Physics, Polish Academy of Sciences, ul. Mariana Smoluchowskiego 17, 60-179 Poznań, Poland
  • 3NanoSpin, Department of Applied Physics, Aalto University School of Science, P.O. Box 15100, FI-00076 Aalto, Finland
  • 4Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek 8, 30-239 Kraków, Poland

  • *Author to whom correspondence should be addressed: akoziol@agh.edu.pl

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Vol. 90, Iss. 4 — 15 July 2014

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