Japanese Journal of Applied Physics · 1989 · 41 citations · 0 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsMagnetic MaterialsThin FilmsFerromagnetic MaterialsMagnetic DomainsMagnetic Recording MaterialsMagnetic Thin FilmsMagnetism In SolidsThin Film Magnetic PropertiesDomain PatternsMagneto-optic Recording MaterialsMagneto-optical EffectsMagneto-optical PropertiesMagneto-optical Recording MediaMultilayer Magnetic FilmsRecording Layer Microstructure
The paper investigates the magnetic and magneto‑optical properties and recording performance of Co/Pt multilayers. The study examines two Co/Pt multilayer structures (4 Å Co/9 Å Pt and 4 Å Co/18 Å Pt) and uses Lorentz microscopy to image domains written by laser‑modulation and magnetic‑field‑modulation techniques. Laser‑modulation produces highly regular domains, whereas magnetic‑field‑modulation leads to pronounced subdomain formation, indicating differences in recording performance.
In this paper the magnetic and magneto-optical properties as well as the recording performance of Co/Pt layered structures are described. Two different structures are investigated: One with 4 Å Co and 9 Å Pt layers and the other with 4 Å Co and 18 Å thick Pt layers. We show with Lorentz microscopy that very regular domains can be written in these layers and we relate these results to the measured recording performance. Domain patterns are written in two different ways, with laser modulation (LM) and magnetic field modulation (MFM). With LM very regularly shaped domains are formed. With MFM we find a strong tendency for subdomain formation.