Title

Annealing behaviour and crystal structure of RF-sputtered Bi-substituted dysprosium iron-garnet films having excess co-sputtered Bi-oxide content

Document Type

Journal Article

Publisher

IOP Publishing Ltd

Faculty

Faculty of Computing, Health and Science

School

Electron Science Research Institute (ESRI)

RAS ID

12563

Comments

This article was originally published as: Vasiliev, M. , Nur E Alam, M. , Alameh, K. , Premchander, P., Lee, Y. T., Kotov, V., & Lee, Y. (2011). Annealing behaviour and crystal structure of RF-sputtered Bi-substituted dysprosium iron-garnet films having excess co-sputtered Bi-oxide content. Journal of Physics D: Applied Physics, 44(7), art. no. 075002 . Original article available here

Abstract

We investigate the magneto-optic properties, crystal structure and annealing behaviour of nano-composite media with record-high magneto-optic quality exceeding the levels reported so far in sputtered iron-garnet films. Bi-substituted dysprosium–gallium iron-garnet films having excess bismuth oxide content are deposited using RF co-sputtering, and a range of garnet materials are crystallized using conventional oven-annealing processes. We report, for the first time ever, the results of optimization of thermal processing regimes for various high-performance magneto-optic iron-garnet compositions synthesized and describe the evolution of the optical and magneto-optical properties of garnet-Bi-oxide composite-material films occurring during the annealing processes. The crystallization temperature boundaries of the system (BiDy)3(FeGa)5O12 : Bi2O3 are presented. We also report the results of x-ray diffraction and energy-dispersive x-ray spectroscopy studies of this recently developed class of high-performance magneto-optic composites. Our hypothesis of iron oxides being the cause of excess optical absorption in sputtered Bi-iron-garnet films is confirmed experimentally.

 

Link to publisher version (DOI)

10.1088/0022-3727/44/7/075002