Investigation of selective realignment of the preferred magnetic direction in spin-valve layer stacks using laser radiation
2014; Elsevier BV; Volume: 302; Linguagem: Inglês
10.1016/j.apsusc.2014.02.133
ISSN1873-5584
AutoresI. Berthold, Mathias Müller, S. Klötzer, Robby Ebert, Senoy Thomas, Patrick Matthes, M. Albrecht, Horst Exner,
Tópico(s)Metallic Glasses and Amorphous Alloys
ResumoSelective realignment of the preferred magnetization direction in a laser micro structured GMR spin-valve layer system (Ni81Fe19/Co90Fe10/Cu/Co90Fe10/IrMn/Ni81Fe19) with a total film thickness of 23 nm was studied. For this, patterns of isolated microstructures (500 μm × 200 μm) were fabricated by laser ablation. These micropatterns were annealed using laser irradiation at a temperature above the IrMn Néel temperature. During laser annealing, the sample was subjected to an external magnetic field in order to selectively realign the magnetic direction of the reference layer. Two different laser assisted annealing techniques were investigated applying either continuous or pulsed laser systems. After laser annealing, the magnetic properties of the micropatterns were investigated using a magnetic microsensor and magneto optical Kerr effect set up.
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