Ferromagnetic Layered Composites. Transfer Matrix Approach

• Authors: H. Puszkarski , M. Krawczyk , J. Lévy , D. Mercier
• Languages of publication: EN

Abstracts

EN

A theoretical analysis of spin-wave excitations in a ferromagnetic layered composite (ABAB... ABA; A and B are different homogeneous ferromagnetic materials) is performed by means of the transfer matrix approach. We focus our attention on two features not yet well studied in the present literature, namely, the existence of forbidden energy gaps in the spin-wave mode spectrum, as well as the properties of multilayer spin-wave mode profiles. These features are discussed in relation to several multilayer characteristics, such as the filling fraction, and the exchange or magnetization contrast; surface pinning conditions and dipolar interactions are also taken into account. The existence of forbidden gaps as well as properties of mode profiles are successfully explained by having recourse to an approximate model of indepe ndent constituent sublayers. Finally, as a byproduct of our investigation, we ascertain that the conventional test for computational convergence within the finite difference method demands to be completed by symmetry mode profile verification, in addition to standard verification of the frequency convergence alone.

Keywords

EN

75.70.-i; 75.30.Ds; 02.60.Dc; 02.70.Bf

Discipline

• 75.70.-i: Magnetic properties of thin films, surfaces, and interfaces(for magnetic properties of nanostructures, see 75.75.-c)
• 75.30.Ds: Spin waves(for spin-wave resonance, see 76.50.+g)
• 02.70.Bf: Finite-difference methods
• 02.60.Dc: Numerical linear algebra

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2001
• Volume: 100
• Issue: Supplement
• Pages: 195-214

Dates

published

2001-12

received

2001-08-09

Contributors

author

H. Puszkarski

• Surface Physics Division, Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

author

M. Krawczyk

• Surface Physics Division, Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

author

J. Lévy

• Laboratoire de Physique Théorique de la Matière Condensée, case 7020, Université Paris 7, 75251 Paris Cedex, France

author

D. Mercier

• Laboratoire de Physique Théorique de la Matière Condensée, case 7020, Université Paris 7, 75251 Paris Cedex, France

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Identifiers

DOI

10.12693/APhysPolA.100.195