Exchange anisotropy in metal-evaporated tapes

Author

Bottoni, Giancarlo ; Candolfo, Donato ; Cecchetti, Antonio

Author_Institution

Dipartimento di Fisica, Ferrara Univ., Italy

Volume

30

Issue

6

fYear

1994

fDate

11/1/1994 12:00:00 AM

Firstpage

3945

Lastpage

3947

Abstract

The hysteretic properties of commercial Metal Evaporated tapes, consisting of one or three layers of Co-Ni-O, have been analysed at low temperature. When the tapes are cooled from room temperature in the saturation remanence, or in presence of a strong applied field, the hysteresis loops at low temperature are displaced, with dissymmetrical values of the coercive fields. Also the rotational hysteresis has an anomalous behaviour with a monotonic increase with the applied field. These effects are due to the interface action between the ferromagnetic Co and the antiferromagnetic CoO, which, at low temperatures, gives rise to the unidirectional exchange anisotropy

Keywords

cobalt alloys; coercive force; ferromagnetic materials; magnetic anisotropy; magnetic hysteresis; magnetic tapes; nickel alloys; remanence; video recording; Co-Ni-O; CoNiO; anomalous behaviour; coercive fields; dissymmetrical values; ferromagnetic materials; hysteresis loops; hysteretic properties; metal-evaporated tapes; monotonic increase; rotational hysteresis; saturation remanence; strong applied field; unidirectional exchange anisotropy; video tape recording; Anisotropic magnetoresistance; Magnetic analysis; Magnetic anisotropy; Magnetic field measurement; Magnetic films; Magnetic hysteresis; Perpendicular magnetic anisotropy; Remanence; Saturation magnetization; Temperature;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.333952

Filename

333952