Exchange bias and major coercivity enhancement in strongly-coupled CuO/Co films

M. Gamino, A. M.H. de Andrade, J. L. Salazar Cuaila, J. E. Schmidt, V. Skumryev, J. Geshev

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5 Citations (Scopus)

Abstract

© 2017 Elsevier B.V. The exchange-bias properties of ferromagnetic, either Co or Ni, thin films deposited onto polycrystalline multiferroic CuO are investigated. After field cooling, the CuO/Co magnetization hysteresis loops show exchange bias at temperatures lower than 200 K, while the CuO/Ni system exhibits bias below about 5 K only. It is suggested that the exchange bias of CuO/Co is determined mainly by the magnetization reversal that takes place on the descending branch of the loop. Rather high values of both the interface coupling energy, 0.89 erg/cm2, and coercivity, 2.44 kOe, of the CuO/Co film are obtained at 5 K.
Original languageEnglish
Pages (from-to)5-9
JournalJournal of Magnetism and Magnetic Materials
Volume449
DOIs
Publication statusPublished - 1 Mar 2018

Keywords

  • Coercivity enhancement
  • Exchange bias
  • Exchange coupling
  • Magnetic anisotropy
  • Multiferroicity

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