Chip organization of Bloch line memory with thermomagnetically written domain patterns

Author

Asada, H. ; Matsuyama, K. ; Gamachi, M. ; Miyoshi, H. ; Taniguchi, K.

Author_Institution

Dept. of Electr. Eng., Kyushu Univ., Fukuoka, Japan

Volume

29

Issue

6

fYear

1993

fDate

11/1/1993 12:00:00 AM

Firstpage

2572

Lastpage

2574

Abstract

A stripe domain stabilization method for Bloch line memory is proposed to simplify the stripe initiation procedure and facilitate the chip fabrication process. In this method, stripe domains are stabilized by stray magnetic fields from thermomagnetically written domain patterns (WDPs) in a perpendicular magnetization film with high coercivity, deposited on a layer supporting stripe domains. Chip organization is studied by experiments and numerical simulation using 5-μm bubble material. The stripe domain heads are stretched using the conductor current with the optimized WDP of 3.5 μm width and 12 μm period. Bit by bit propagation of vertical Bloch line pairs is confirmed by numerical simulations for the chip with the WDP having a fish-bone shape, which can perform both stripe stabilization and bit confinement

Keywords

Bloch line memories; cobalt alloys; coercive force; ferrimagnetic properties of substances; iron alloys; magnetic bubbles; magnetic domain walls; magnetic film stores; magnetic properties of amorphous substances; magnetisation; numerical analysis; terbium alloys; Bloch line memory; TbFeCo amorphous film; bit confinement; bubble material; chip fabrication process; chip organisation; coercivity; conductor current; fish-bone shape; numerical simulation; numerical simulations; optimized WDP; perpendicular magnetization film; stray magnetic fields; stripe domain heads; stripe domain stabilization method; thermomagnetically written domain patterns; vertical Bloch line; Chip scale packaging; Coercive force; Conducting materials; Magnetic fields; Magnetic films; Magnetic heads; Magnetic materials; Magnetization; Numerical simulation; Shape;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.280950

Filename

280950