Abstract
Hard-soft composite (BaFe12O19:Mg0.1Ni0.3Zn0.6Fe2O4 (2:1) films, were deposited by ‘Pulsed Laser Deposition’ (PLD) technique on Si (100) substrate using different deposition time - 30, 60, 90 and 120 minutes. Influence of deposition time on structural and magnetic properties were studied via X-ray diffraction (XRD) and vibrating sample magnetometer (VSM). XRD confirms the presence of soft and hard phases in all the prepared thin films. Small amount of secondary phase - Fe2O3 is also detected in all the thin films except for the deposition time - 90 mins. With deposition time average grain diameter of both hard (BaFe12O19) and soft (Mg0.1Ni0.3Zn0.6Fe2O4) phase increases. Increase in the distance between the magnetic ions (Ni2+ and Fe3+) at tetrahedral (A) and octahedral [B] site leads to increase in the hopping length at A and B site except for the the deposition time of 60 minutes. Magnetic measurements shows that the coercivity and magnetization of the prepared thin films respectively ranges between 112.07 - 213.03 Oe and 1.4 x 10-7 - 3.15 x 10-7 Am2.
Highlights
There has been immense attention on the materials having good exchange spring coupling behavior
Magnetization measurements on deposited thin films were done using LakeShore Model 7410 vibrating sample magnetometer (VSM) with a maximum applied field of 1.7 Tesla
The variation in the hopping length at A and B site can be attributed to the increase in the distance between the magnetic ions (Ni2+ and Fe3+) at A and B site for all the values of the deposition time except for 60 minutes
Summary
Journal of Physics: Conference Series 755 (2016) 012043 doi:10.1088/1742-6596/755/1/012043.
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