Effect of deposition temperature on structural, microstructural and magnetic properties of CoFe2O4 thin films deposited by pulsed laser deposition

Madhav Kumar, V and Srinivas, A and Talapatra, A and Asthana, Saket and Mohanty, J and Kamat, S V (2017) Effect of deposition temperature on structural, microstructural and magnetic properties of CoFe2O4 thin films deposited by pulsed laser deposition. Journal of Materials Science: Materials in Electronics, 28 (1). pp. 446-453. ISSN 0957-4522

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Abstract

A systematic study about the variation in microstructure and magnetic properties of Cobalt ferrite thin films, deposited on Si/SiO2/TiO2/Pt (111) substrate by using pulsed laser deposition at a constant oxygen pressure of 9 Pa with substrate temperatures ranging from 550 to 750 °C at an interval of 100 °C has been reported. All films showed the (111) preferred orientation with single phase confirmed by grazing incidence X-ray diffraction and Raman spectra. Moreover, the films showed all the active raman modes that were present in the cobalt ferrite target. The films deposited at 550 and 650 °C exhibits uniform and smooth surface features whereas deposition at 750 °C gives rise to porosities and voids due to re-evaporation of atoms from the deposited film. The grain size and roughness of the films increased with increasing deposition temperature. The induced in-plane tension in the film due to thermal expansion mismatch between substrate and film causes the increase in the perpendicular magnetic anisotropy. A sharp increase in out-of-plane coercivity and the domain size was observed at higher deposition temperatures.

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IITH Creators:
IITH CreatorsORCiD
Asthana, Sakethttp://orcid.org/0000-0002-6420-3304
Item Type: Article
Subjects: Physics > Magnetism
Materials Engineering > Materials engineering
Divisions: Department of Physics
Depositing User: Team Library
Date Deposited: 25 Oct 2016 06:23
Last Modified: 29 Aug 2017 09:32
URI: http://raiithold.iith.ac.in/id/eprint/2831
Publisher URL: https://doi.org/10.1007/s10854-016-5541-y
OA policy: http://www.sherpa.ac.uk/romeo/issn/0957-4522/
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