200 MeV Ag⁺¹⁵ion irradiation-induced modifications in structural, magnetic and dielectric properties of nanoparticles of Cu_0.2Zn_0.8Fe₂O₄ferrite

Structural and magnetic properties of zinc ferrite thin films irradiated by 90 keV neon ions

“…They attributed this increase to a subsequent distribution of ferric ions over tetrahedral and octahedral sites induced after irradiation in zones extending around heavy ions trajectories. An increase of the magnetization has also been observed in 30-60 nm zinc ferrites and other nanocrystalline ferrites irradiated by 200 MeV Ag 15+[42][43][44][45]. The analog magnetization increasing after irradiation in our case signifies that also low energy irradiations can lead to rearrangement of metallic cations inside the thin films.…”

“…Studies on other ferrites nanoparticles irradiated by swift heavy ions also indicated a small increase of the coercivity [42][43][44][45] for samples where the irradiation lead to crystal growth, cation redistribution and surface modifications. Singh et al (39) reported in a similar study on size dependent features of swift heavy ion irradiation in nanoparticles zinc ferrite systems.…”

“…Changes in the magnetization are linked to a partial inversion of the direct spinel phase [52]. A shift of the blocking temperature also toward higher values was observed in the case of 10 nm zinc ferrite nanoparticles [20] when irradiated by 5x10 13 ions/cm 2 100 MeV oxygen beams but also in other ferrite irradiated by 200 MeV Ag 15+ beams [42][43][44][45]. To justify the irradiation-induced magnetization, it can be assumed that atomic displacements of Fe 3+ cations at tetrahedral sites took place.…”

Physical Property Variation of Ferrite Nanoparticles under Heavy Ion Irradiation

“…This shows the formation of sub-levels in the small-sized irradiated samples, thereby affecting the optical behaviour of irradiated nanoferrites. Apart from the changes in structural, magnetic and optical properties, few reports are available showing the modification in dielectric behavior of ferrites under heavy ion irradiation (Dolia et al, 2012, Dolia et al, 2013. Fe3O4 thin films are investigated to observe modification in electrical behavior under 190 MeV Ag 15+ ions (Kumar et al, 2006).…”