Magnetic and magneto-optic properties of ordered barium ferrite films produced by rapid thermal annealing

Author

Carey, Roy ; Gago-Sandoval, Pedro A. ; Newman, David M. ; Thomas, Bransby W J

Author_Institution

Centre for Data Storage Mater., Coventry Univ., UK

Volume

29

Issue

6

fYear

1993

fDate

11/1/1993 12:00:00 AM

Firstpage

3799

Lastpage

3801

Abstract

A rapid thermal annealing (RTA) process has been developed that permits the preparation of well ordered films of barium ferrite (BaFe ₁₂O₁₉) in minutes, rather than the hours conventionally required. Optical fluxes ≈40 W cm^-2 are used to produce linear heating rates up to 20°C sec^-1 and achieve final sample temperatures in excess of 750°C in less than one minute. Frequency and duty cycle modulation of the radiant optical energy allows close control of the heating cycle and the production of different RTA regimes. The magnetic and structural properties of the annealed samples have been shown to be dependent on the particular regime followed

Keywords

Kerr magneto-optical effect; X-ray diffraction examination of materials; barium compounds; ferrites; incoherent light annealing; magnetic hysteresis; magnetic thin films; optical constants; rapid thermal processing; sputtered coatings; 400 C; 720 C; 800 C; BaFe₁₂O₁₉; Kerr rotation; RF magnetron sputtering; RTA process; X-ray diffraction; duty cycle modulation; frequency modulation; hysteresis loop; linear heating rates; magneto-optic properties; optical constants; optical fluxes; ordered Ba ferrite film; radiant optical energy; rapid thermal annealing; structural properties; Barium; Ferrite films; Heating; Magnetic films; Magnetic properties; Optical films; Optical modulation; Rapid thermal annealing; Rapid thermal processing; Temperature;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.281304

Filename

281304