Title :
Antiferromagnetic coupled high-frequency carrier-type magnetic field sensor using NiFe/FeMn multilayer
Author :
Takezawa, Masaaki ; Yamasaki, Jiro
Author_Institution :
Kyushu Inst. of Technol., Kitakyushu, Japan
Abstract :
Summary form only given. We discuss a new method of obtaining asymmetrical characteristics of high-frequency carrier-type magnetic sensors (or so-called MI sensor) by using antiferromagnetic coupling. Generally, high sensitivity of the sensor is realized by applying a dc bias field because the sensor is insensitive around a zero applied field due to the symmetrical characteristics. Our main idea is lamination of ferromagnetic films with antiferromagnetic films, which can obtain asymmetrical characteristics without dc bias field owing to unidirectional anisotropy.
Keywords :
antiferromagnetic materials; exchange interactions (electron); ferromagnetic materials; iron alloys; laminations; magnetic anisotropy; magnetic multilayers; magnetic sensors; magnetisation; manganese alloys; nickel alloys; sputtered coatings; MI sensor; Ni/sub 80/Fe/sub 20/-Fe/sub 50/Mn/sub 50/; NiFe/FeMn multilayer; antiferromagnetic coupling; antiferromagnetic films; asymmetrical characteristics; ferromagnetic films; high-frequency carrier-type magnetic sensors; lamination; magnetization; unidirectional anisotropy; Antiferromagnetic materials; Couplings; Magnetic anisotropy; Magnetic films; Magnetic heads; Magnetic multilayers; Magnetic sensors; Magnetization; Permeability; Sensor phenomena and characterization;
Conference_Titel :
Magnetics Conference, 2002. INTERMAG Europe 2002. Digest of Technical Papers. 2002 IEEE International
Conference_Location :
Amsterdam, The Netherlands
Print_ISBN :
0-7803-7365-0
DOI :
10.1109/INTMAG.2002.1001281
