Structure, magnetic morphology and magnetization correlations in pulsed laser deposited CoFe2O4 (111) thin films

Mohanty, Jyoti Ranjan (2023) Structure, magnetic morphology and magnetization correlations in pulsed laser deposited CoFe2O4 (111) thin films. Thin Solid Films, 770. p. 139763. ISSN 0040-6090

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Abstract

The present paper reports a complete study on the correlation between structure, morphology, and magnetic properties of (111)-oriented cobalt ferrite (CoFe2O4) thin films with varying film thickness. The CoFe2O4 (CFO) thin films were deposited on Pt-coated Si substrate by pulsed laser deposition (PLD) at 550 °C. The x-ray diffraction (XRD) data confirms the (111)-oriented growth of the cobalt ferrite films. The in-plane morphology of the films in the field emission scanning electron micrographs ensure the Stranski–Krastanov growth mechanism, and the atomic force micrographs confirms the effect of lattice relaxation on the morphology of the films with varying thickness. The possible cation distributions for the samples were determined from the Raman spectroscopy, which revealed the crystal structure-magnetic property correlations in cobalt ferrite films. The magnetic hysteresis (M−H) loops show a significant spin reorientation by showing the variation between the in-plane (IP) and out-of-plane (OP) magnetization. The presence of a kink on the OP M−H loops and its variation with film thickness clearly establishes the existence of competing magnetic anisotropies in the films. The high coercivity (HC) values observed for OP magnetization of cobalt ferrite films with thicknesses 115 nm and 125 nm may be explored for possible room-temperature (RT) device applications.

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IITH Creators:

IITH Creators	ORCiD
Mohanty, Jyoti Ranjan	UNSPECIFIED

Item Type:

Article

Uncontrolled Keywords:

Cation distribution; Cobalt ferrite; Coercivity; Magnetic anisotropy; Raman spectroscopy; Thin films; Cobalt; Coercive force; Crystal structure; Ferrite; Film thickness; Iron compounds; Magnetic anisotropy; Magnetization; Morphology; Positive ions; Pulsed laser deposition; Pulsed lasers; Raman spectroscopy; Scanning electron microscopy; Cation' distributions; Cobalt ferrites; Ferrite films; Film-thickness; Magnetic hysteresis loops; Out-of-plane; Pulsed-laser deposition; Si substrates; Thin-films; X-ray diffraction data

Subjects:

Physics
Physics > Magnetism

Divisions:

Department of Physics

Depositing User:

Mr Nigam Prasad Bisoyi

Date Deposited:

24 Sep 2023 09:48

Last Modified:

24 Sep 2023 09:48

URI:

http://raiithold.iith.ac.in/id/eprint/11689