Easy Axis Oriented Lithium Mixed Ferrite Films Deposited by the PLD Method

P. Samarasekara

Chinese Journal of Physics

40卷6期（2002 / 12 / 01）

631 - 636

英文

Magnetic thin films of lithium mixed ferrite were grown on C-, R-, and A-plane sapphire Al2O3 substrates, on fused quartz and on polycrystalline substrates, using the pulse laser deposition (PLD) method. Polycrystalline substrates, amorphous substrates and single crystal (or sapphire) substrates have been used in these studies. The films deposited on C-plane sapphire substrates indicated a strong orientation of the easy axis (111), although it was difficult to grow easy axis oriented films on the other substrates, according to our studies. All the lithium mixed ferrite films deposited on different kinds of substrates could be directly crystallized without any post deposition annealing treatment. Other elements, such as Mn, Ti and Zn, were added to lithium ferrite to reduce the saturation magnetization without changing the structure of the lithium ferrite. Relatively higher deposition rates could be obtained using the PLD method compared with the rf sputtering technique. Easy axis oriented films are especially useful in monolithic microwave integrated circuits. The orientation of the substrate directly governs the orientation of the easy axis in our lithium mixed ferrite films.