Micromagnetic simulation of exchange coupled ferri-/ferromagnetic heterostructures

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:381

Article

Oezelt, Harald¹  Kovacs, Alexander¹  Reichel, Franz¹  Fischbacher, Johann¹  Bance, Simon¹  Gusenbauer, Markus⁴  Schubert, Christian^2,3  Albrecht, Manfred^2,3  Schrefl, Thomas^1,4 

[1] St Polten Univ Appl Sci, A-3100 St Polten, Austria

[2] Tech Univ Chemnitz, Inst Phys, D-09126 Chemnitz, Germany

[3] Univ Augsburg, Inst Phys, D-86159 Augsburg, Germany

[4] Danube Univ Krems, Ctr Integrated Sensor Syst, A-2700 Wiener Neustadt, Austria

关键词: Exchange-coupled composite media;    Micromagnetic simulations;    Ferrimagnet;    FEM;    Domain wall motion;    Finite size effect;    Pinning;   

DOI  :  10.1016/j.jmmm.2014.12.045

来源: Elsevier

【 摘 要 】

Exchange coupled ferri-/ferromagnetic heterostructures are a possible material composition for future magnetic storage and sensor applications. In order to understand the driving mechanisms in the demagnetization process, we perform micromagnetic simulations by employing the Landau-Lifshitz-Gilbert equation. The magnetization reversal is dominated by pinning events within the amorphous fern-magnetic layer and at the interface between the ferrimagnetic and the ferromagnetic layer. The shape of the computed magnetization reversal loop corresponds well with experimental data, if a spatial variation of the exchange coupling across the ferri-/ferromagnetic interface is assumed. (C) 2014 The Authors. Published by Elsevier B.V.

【 授权许可】

Free