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http://dx.doi.org/10.4283/JKMS.2005.15.2.125

The Preparation and Magnetic Properties in Ba-ferrite Film on the A12O3 Substrate  

Sur, Jung-Chul (Department of Physics, Wonkwang University)
Park, Chul-Jin (Department of Physics, Wonkwang University)
Choi, Jung-Wan (Department of Physics, Wonkwang University)
Publication Information
Journal of the Korean Magnetics Society / v.15, no.2, 2005 , pp. 125-129 More about this Journal
Abstract
Ba-Ferrite thin films were prepared on $A1_2O_3$ substrate by a pulsed laser deposition system and characterized by SEM, $M\ddot{o}$ssbauer spectroscopy and VSM. The appropriate conditions of pulsation in Ba-ferrite was the oxygen pressure of 0.1 Torr at a substrate temperature of $400^{\circ}C$ and the thickness was variable with the deposition time. Ba-ferrite crystals had the forms of hexagonal plate in the 5 minute deposited film and the needle grains coexisted with the increasing film thickness. $M\ddot{o}ssbauer$ spectroscopy assured that the direction of atomic spin in Fe ion tends to normal to the substrate in the hexagonal plate. The VSM curves have the two types hysteresis of hexagonal and needle phase.
Keywords
Ba-ferrite film; Mossbauer; spin direction; hysteresis;
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