Engineering structural and magnetic properties of Mg_0.95Mn_0.05Fe₂O₄ thin films using 200 MeV Au ions

Abstract

Pulsed laser deposited thin films of Mg_0.95Mn_0.05Fe₂O₄ ferrite were irradiated by 200 MeV Au¹⁴⁺ with a maximum dose up to 1 × 10¹² ions/cm². The as-deposited and irradiated thin films are investigated using X-ray diffraction (XRD), Raman Spectroscopy, Field emission electron microscopy (FESEM) and dc magnetization measurements. XRD and Raman spectroscopy measurements reflect the cubic spinel structure of films before and after irradiation. FESEM measurements demonstrate that films are composed of nano rods and nanocrystalline grains. Magnetic hysteresis loop measurements reveal that all the films have ferrimagnetic ordering at room temperature with enhancement in the coercive field and remnant magnetization due to irradiation.