Ferromagnetism in epitaxial orthorhombic YMnO<inf>3</inf> thin films

X. Marti, V. Skumryev, A. Cattoni, R. Bertacco, V. Laukhin, C. Ferrater, M. V. García-Cuenca, M. Varela, F. Sánchez, J. Fontcuberta

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34 Citations (Scopus)

Abstract

Epitaxial orthorhombic YMnO3 thin films, (0 0 1) oriented, have been grown by pulsed laser deposition on (0 0 1)SrTiO3 substrates. Their crystal structure and magnetic response have been studied in detail. Although bulk o-YMnO3 is antiferromagnetic, our magnetic measurements reveal intriguing thermal hysteresis between the zero-field-cooled and field-cooled curves below the onset of the antiferromagnetic ordering temperature, thus signaling a more complex magnetic structure with net ferromagnetic moments. We discuss on the possible origin of this net magnetization and we have found a correlation of the magnetic response with the strain state of the films. We propose that substrate-induced strain modifies the subtle competition of magnetic interactions and leads to a non-collinear magnetic state that can thus be tuned by strain engineering. © 2009 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)1719-1722
JournalJournal of Magnetism and Magnetic Materials
Volume321
DOIs
Publication statusPublished - 1 Jun 2009

Keywords

  • Induced ferromagnetism
  • Multiferroic films
  • Strain effects
  • YMnO 3

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