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Structural and magnetic properties of Dy3+ doped Y3Fe5O12 for microwave devices

Sadhana, K and Murthy, Ramana S and Praveena, K (2015) Structural and magnetic properties of Dy3+ doped Y3Fe5O12 for microwave devices. In: MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING, 34 . pp. 305-311.

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Official URL: http://dx.doi.org/10.1016/j.mssp.2015.02.056

Abstract

The Dy3+ doped Y3-xDyxFe5O12 (x=0-3) nanopowders were prepared using microwave hydrothermal route. The structural and morphological studies were analyzed using transmission electron microscope, X-ray diffractometer and field emission scanning electron microscope. The nanopowders were sintered at 900 degrees C/90 min using microwave furnace. Dense ceramics with theoretical density of around 95% was obtained. Ferro magnetic resonance (FMR) spectrum and microwave absorption spectrum of Dy3+ doped YIG were studied, the signal exhibits a resonance character for all Dy3+ variations. It was observed that the location of the FMR signal peak at the field axes monotonically shifts to higher field with increasing Dy3+ content. The dielectric and magnetic properties (epsilon', epsilon `', mu' and mu `') of Dy3+ doped YIG were studied over a wide range of frequency (1-50 GHz). With increase of Dy3+ both epsilon' and mu' decreased. The low values of dielectric, magnetic properties and broad distribution of FMR line width of these ceramics are opening the real opportunity to use them for microwave devices above K- band frequency. (C) 2015 Elsevier Ltd. All rights reserved.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the ELSEVIER SCI LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
Keywords: Garnets; Microwave hydrothermal synthesis; Dielectric properties; Magnetic properties; Ferromagnetic resonance
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Depositing User: Id for Latest eprints
Date Deposited: 29 May 2015 05:36
Last Modified: 29 May 2015 05:36
URI: http://eprints.iisc.ac.in/id/eprint/51598

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