By Topic

Magnetic Measurements of RE-Doped Cobalt Ferrite Thin Films

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Dascalu, G. ; Fac. of Phys., Alexandru Ioan Cuza Univ., Iasi, Romania ; Durneata, D. ; Caltun, O.F.

Cobalt ferrite is a ferrimagnetic material with properties which support its use in different types of devices. In bulk form CoFe2O4 presents the highest magnetostriction coefficient relative to other ferrites making it a good candidate for sensors and actuators. Due to the industries miniaturization trend, several research groups focused their study on obtaining novel thin films with high magnetostriction coefficient. The aim of this work was to investigate the influence of the substrate temperature and rare earth addition on the properties of cobalt ferrite thin films deposited by pulsed laser deposition. CoFe2O4, CoFe1.8Gd0.2O4 and CoFe1.8La0.2O4 thin films were deposited using an Nd-YAG laser (532 nm) with a 10 Hz repetition rate and 10 ns pulse duration. The target-substrate distance of 2.5 cm and laser fluence of 10 J/cm2 were kept constant. The substrate temperature was varied from 200 °C to 600 °C. The structural properties of the thin films obtained by Raman spectroscopy and scanning electron microscopy indicated the formation of a single cobalt ferrite structure. Hysteresis loops for both in-plane and out-of-plane configuration were obtained using a vibrating sample magnetometer. These results showed an increase in coercive field and maximum magnetization as the substrate temperature was raised from 200 °C to 400 °C. Vibrating sample magnetometer measurements of the cobalt ferrite thin film deposited at 400 °C revealed a tendency of the particles to a perpendicular magnetic arrangement.

Published in:

Magnetics, IEEE Transactions on  (Volume:49 ,  Issue: 1 )