Structural and Magnetic Characterizations of 200 MeV Ag15+ Irradiated BixCo2-xMnO4 Thin Films

摘要

The effect of swift heavy ion (SHI) irradiation on the structural and magnetic properties of thin films of Bi-substituted Co_2MnO_4 prepared by Pulsed Laser Deposition (PLD) is presented. XRD analysis reveals that the Bi_xCo_(2-x) MnO_4 (x = 0.0, 0.1 & 0.3) films grown on amorphous quartz, and crystalline LaAlO_3 (LAO) exhibited single phase cubic spinel structure with low strain before and after the irradiation at 200 MeV Ag~(15+) ions at three fluence values 1 × 10~(11), 5 × 10~(11) and 1 × 10~(12) ions/cm~2. DC magnetization hysteresis loop study of the films revealed a ferrimagnetic ordering below the transition temperature ~ 185 K and the saturation magnetization was increased by the irradiation at optimal fluence value 5×10~(11) ions/cm~2. X-ray Magnetic Circular Dichroism (XMCD) studies showed the antiparallel alignments of Co and Mn magnetic moments.