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1987•IEEE Translation Journal on Magnetics in JapanRequires access

Magnetic Characteristics of Fine Permalloy Patterns

Yoshinori Yonekura, T. Yanase, T. Majima

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Abstract

The magnetization behavior of patterned Permalloy film used in bubble memory elements is described. A total of 4.6 × 106pattern elements were formed in Permalloy film evaporated onto a GGG substrate, spaced at a period of 4.5 μm. In-plane magnetization curves showed almost no change when a bias field was applied normal to the film, and patterning resulted in a strong shape effect. The in-plane magnetization curves had bends which were attributed to different magnetization characteristics prevailing in different portions of each pattern.

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What this paper is about

The magnetization behavior of patterned Permalloy film used in bubble memory elements is described. A total of 4.6 × 106pattern elements were formed in Permalloy film evaporated onto a GGG substrate, spaced at a period of 4.5 μm. In-plane magnetization curves showed almost no change when a bias field was applied normal to the film, and patterning resulted in a strong shape effect. The in-plane magnetization curves had bends which were attributed to different magnetization characteristics prevailing in different portions of each pattern.

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Available abstract

The magnetization behavior of patterned Permalloy film used in bubble memory elements is described. A total of 4.6 × 106pattern elements were formed in Permalloy film evaporated onto a GGG substrate, spaced at a period of 4.5 μm. In-plane magnetization curves showed almost no change when a bias field was applied normal to the film, and patterning resulted in a strong shape effect. The in-plane magnetization curves had bends which were attributed to different magnetization characteristics prevailing in different portions of each pattern.

Key concepts: Permalloy, Magnetization, Materials science, Condensed matter physics, Substrate (aquarium), Plane (geometry), Magnetic field, Nuclear magnetic resonance

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