Low Temperature Magnetization Studies of Nanocrystalline Zn-Ferrite Thin Films

A study of temperature dependance of magnetization was carried out on nanocrystaline Zn-ferrite thin films deposited using Pulsed Laser Deposition (PLD) at three different substrate temperatures. The temperature dependence of the films deposited at ambient temperature, 350 and 850°C showed marked difference in the temperature dependence of their magnetization. While the sample deposited at 850°C showed predominantly antiferromagntic grains, the one deposited at 350°C showed a ferrimagnetic behavior. The ambient temperature deposited film showed mainly superparamagnetic grains.