Incoherent rotation in barium ferrite thin film recording media

Author

Chen, Yingjian ; Yang, Wei ; Lambeth, David N. ; Kryder, Mark H.

Author_Institution

Data Storage Syst. Center, Carnegie Mellon Univ., Pittsburgh, PA, USA

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

2998

Lastpage

3000

Abstract

The angular dependence of the remanent magnetic properties of uniaxially in-plane oriented barium ferrite films were found to deviate significantly from the Stoner-Wohlfarth (SW) coherent rotation model. The in-plane torque and the rotational hysteresis were studied in both aligned and randomly oriented films. They were found to be different from that calculated from the SW coherent rotation model, and suggested incoherent rotation of magnetization during the switching process. Incoherent rotation was found to be dependent on grain size and intergranular interactions

Keywords

ferrites; grain size; magnetic hysteresis; magnetic recording; magnetic thin films; magnetisation reversal; remanence; BaFe₁₂O₁₉; aligned films; grain size; in-plane torque; intergranular interactions; magnetisation incoherent rotation; randomly oriented films; remanent magnetic properties; rotational hysteresis; switching process; thin film recording media; uniaxially in-plane oriented films; Barium; Ferrite films; Grain size; Magnetic films; Magnetic hysteresis; Magnetic properties; Magnetic recording; Magnetic switching; Magnetization; Torque;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.617823

Filename

617823