Magnetization processes in exchange-coupled double-layer films with in-plane and perpendicular anisotropy

R. Sbiaa, H. Le Gall, J. M. Desvignes, M. El Harfaoui

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Magnetic curves in exchange-coupled double layers (ECDL) with planar and perpendicular anisotropies are experimentally determined by Faraday measurements. In order to interpret unusual hysteresis loops, we have extended the model of Kobayashi applied to our systems. We show that all possible ECDL films can be grouped in two bilayer types. In the first one, the sublattice magnetization of transition metal (TM) and rare earth (RE) of each layer rotates coherently with external magnetic field and we call this Type P (parallel). In the second type, the TM (resp. RE) magnetization of the first-layer rotates in the opposite direction to the corresponding magnetization of the second layer and we call this Type A (antiparallel). By changing the film composition or its temperature, we can obtain a transition from one type to the other with also a change of the magnitude of the interface energy which can be measured experimentally.

Original languageEnglish
Pages (from-to)247-253
Number of pages7
JournalJournal of Magnetism and Magnetic Materials
Volume183
Issue number1-2
Publication statusPublished - Mar 7 1998

Fingerprint

Rare Earth Metals
Magnetization
Anisotropy
magnetization
Rare earths
anisotropy
Transition metals
Hysteresis loops
rare earth elements
transition metals
Magnetic fields
sublattices
Chemical analysis
hysteresis
curves
Temperature
magnetic fields
temperature
energy

Keywords

  • Anisotropy
  • Exchange coupling
  • Magnetization

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Magnetization processes in exchange-coupled double-layer films with in-plane and perpendicular anisotropy. / Sbiaa, R.; Le Gall, H.; Desvignes, J. M.; El Harfaoui, M.

In: Journal of Magnetism and Magnetic Materials, Vol. 183, No. 1-2, 07.03.1998, p. 247-253.

Research output: Contribution to journalArticle

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AB - Magnetic curves in exchange-coupled double layers (ECDL) with planar and perpendicular anisotropies are experimentally determined by Faraday measurements. In order to interpret unusual hysteresis loops, we have extended the model of Kobayashi applied to our systems. We show that all possible ECDL films can be grouped in two bilayer types. In the first one, the sublattice magnetization of transition metal (TM) and rare earth (RE) of each layer rotates coherently with external magnetic field and we call this Type P (parallel). In the second type, the TM (resp. RE) magnetization of the first-layer rotates in the opposite direction to the corresponding magnetization of the second layer and we call this Type A (antiparallel). By changing the film composition or its temperature, we can obtain a transition from one type to the other with also a change of the magnitude of the interface energy which can be measured experimentally.

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