Modification of magnetic anisotropy induced by swift heavy ion irradiation in cobalt ferrite thin films

Nongjai, Razia; Khan, Shakeel; Ahmed, Hilal; Khan, Imran; Annapoorni, S.; Gautam, Sanjeev; Lin, Hong‐Ji; Chang, Fan; Chae, Keun Hwa; Asokan, K.

doi:10.1016/j.jmmm.2015.06.080

Cited by 8 publications

(3 citation statements)

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“…On further irradiating the material with higher fluence, an increase in crystallite size was observed which was attributed to the breaking of crystallites and joining again to form larger crystallites. Nongjai et al (2015). observed decrease in the intensity of peaks corresponding to planes in the XRD pattern with increase in irradiation fluence on cobalt ferrite thin films.…”

Section: Experimental Results For Swift Heavy Ion Irradiation Induced...mentioning

confidence: 90%

“…Thus, cation inversion is responsible for the changes in the properties of ferrites. There are certain methods such as laser irradiation (Tawfik et al, 2002;Ateia et al, 2019), ion implantation (Sharma et al, 2023a), gamma-irradiation (Raut et al, 2018) and heavy ion irradiation (Nongjai et al, 2023) which are well known to change the physical behavior of ferrites in a controlled way. This review focuses on the cation inversion manipulation and associated changes with swift heavy ion irradiation.…”

Section: +mentioning

confidence: 99%

“…The dissipation of energy in the materials during ion beam irradiation is responsible for the formation of latent tracks. It induces the rearrangement in the distribution of cations, the oxygen as well as inversion parameters and produces significant changes in magnetic properties of a typical ferrite (Nongjai et al, 2015). The rearrangement of cations in ferrites depends on the type of selected ions as well as on the energy and fluence range of the ions.…”

Section: Magnetic Propertiesmentioning

confidence: 99%

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Physical Property Variation of Ferrite Nanoparticles under Heavy Ion Irradiation

Dhyani,

Joshi,

Sahoo

et al. 2024

Prabha Materials Science Letters

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The size-dependent behavior of nanostructured ferrite is well established. Various physical properties such as magnetic, optical and electrical exhibit strong size dependence. Thus, any treatment which causes a change in size is able to modify the characteristics of ferrites. The result of this effect can be seen when these ferrites are subjected to an intense heavy ion beam which modifies the physical properties of ferrites. This modification is related to cation redistribution owing to size change in most of the cases under heavy ion irradiation. However, few recent studies show that cation redistribution may occur under ion irradiation even though no size change is observed. The objective of this review is to highlight this effect in ferrite systems which ultimately may provide ample opportunity for its potential applications.

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Section: Experimental Results For Swift Heavy Ion Irradiation Induced...mentioning

confidence: 90%

Section: +mentioning

confidence: 99%

Section: Magnetic Propertiesmentioning

confidence: 99%

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Physical Property Variation of Ferrite Nanoparticles under Heavy Ion Irradiation

Dhyani,

Joshi,

Sahoo

et al. 2024

Prabha Materials Science Letters

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Modification induced by electronic excitation in CoFe₂O₄ thin films: Structural, morphological, and magnetic properties

Nongjai,

Bala,

Khan

et al. 2024

Applied Research

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The present study focuses on the modification induced by 200 MeV Ag15+ and 100 MeV O7+ ion irradiations on the structural, surface morphological, and magnetic properties of radio frequency sputtered CoFe2O4 (CFO) thin films grown on SiO2/Si (100) substrates. X‐ray diffraction (XRD) shows amorphization of the CFO thin films when irradiated with Ag ions and varies with fluences. This effect is absent in the case of O ion irradiated CFO films. These results are consistent with the measurements from the Raman spectroscopy where the intensities of Eg and T2g modes are significantly reduced and further disappear in the high fluence. The surface morphology of the O ion irradiated films is dramatically different from the pristine and Ag ion irradiated films where the surfaces appear in nanopillars‐like patterns. The topography of the O ion irradiated films appears to be like hill and valley structures, the roughness first increases (from 10.11 nm to 24.39 nm). Then it decreases to 18.93 nm on further increasing ion fluence. The coercivity, remnant magnetization, and saturation magnetization increase upon irradiation at low fluence 5×1011 ions/cm2 for both the ion beams and then downturn with the increase of fluence 5×1012 ions/cm2. The changes in the magnetic and structural characteristics are ascribed to the defects induced by ion irradiation. These results are understood based on the structural and surface modifications induced by the electronic excitation of Ag and O ions. The study depicts that a controlled selection of ions and beam fluence can tailor the structure, morphology, and magnetic properties of ferrite films.This article is protected by copyright. All rights reserved.

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Modification of structural, topographical and magnetic properties induced by Ag ion irradiations in pure and divalent metal (Zn2+ and Co2+)-doped iron oxide thin films

Qayoom

Shah

Asokan

et al. 2022

J Mater Sci: Mater Electron

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Modification of magnetic anisotropy induced by swift heavy ion irradiation in cobalt ferrite thin films

Cited by 8 publications

References 42 publications

Physical Property Variation of Ferrite Nanoparticles under Heavy Ion Irradiation

Physical Property Variation of Ferrite Nanoparticles under Heavy Ion Irradiation

Modification induced by electronic excitation in CoFe₂O₄ thin films: Structural, morphological, and magnetic properties

Modification of structural, topographical and magnetic properties induced by Ag ion irradiations in pure and divalent metal (Zn2+ and Co2+)-doped iron oxide thin films

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Modification of magnetic anisotropy induced by swift heavy ion irradiation in cobalt ferrite thin films

Cited by 8 publications

References 42 publications

Physical Property Variation of Ferrite Nanoparticles under Heavy Ion Irradiation

Physical Property Variation of Ferrite Nanoparticles under Heavy Ion Irradiation

Modification induced by electronic excitation in CoFe2O4 thin films: Structural, morphological, and magnetic properties

Modification of structural, topographical and magnetic properties induced by Ag ion irradiations in pure and divalent metal (Zn2+ and Co2+)-doped iron oxide thin films

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Modification induced by electronic excitation in CoFe₂O₄ thin films: Structural, morphological, and magnetic properties