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  • Letter
  • Open Access

Boundary-induced phase in epitaxial iron layers

Anna L. Ravensburg1, Mirosław Werwiński2, Justyna Rychły-Gruszecka2, Justyn Snarski-Adamski2, Anna Elsukova3, Per O. Å. Persson3, Ján Rusz1, Rimantas Brucas4, Björgvin Hjörvarsson1 et al.

Peter Svedlindh4, Gunnar K. Pálsson1, and Vassilios Kapaklis1

  • 1Department of Physics and Astronomy, Uppsala University, Box 516, 75120 Uppsala, Sweden
  • 2Institute of Molecular Physics, Polish Academy of Sciences, ul. M. Smoluchowskiego 17, 60-179 Poznań, Poland
  • 3Thin Film Physics Division, Department of Physics, Chemistry and Biology (IFM), Linköping University, 58183 Linköping, Sweden
  • 4Department of Materials Science and Engineering, Uppsala University, Box 35, 75103 Uppsala, Sweden

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Phys. Rev. Materials 8, L081401 – Published 12 August, 2024

DOI: https://doi.org/10.1103/PhysRevMaterials.8.L081401

Abstract

We report on the discovery of a boundary-induced body-centered tetragonal iron phase in thin films deposited on MgAl2O4 (001) substrates. We present evidence for this phase using detailed x-ray analysis and ab initio density functional theory calculations. A lower magnetic moment and a rotation of the easy magnetization direction are observed, as compared with body-centered cubic iron. Our findings expand the range of known crystal and magnetic phases of iron, providing valuable insights for the development of heterostructure devices using ultrathin iron layers.

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Phys. Rev. Materials 8, L081401– Published 12 August, 2024
  • Received 22 January 2024
  • Revised 15 May 2024
  • Accepted 21 June 2024
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