Journal ArticleDOI
Swift heavy ion irradiation induced damage creation in nanocrystalline Li–Mg ferrite thin films
Sanjukta Ghosh,Ajay Gupta,Pushan Ayyub,Nitendar Kumar,S.A. Khan,Debasish Banerjee,R. Bhattacharya +6 more
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TLDR
In this paper, a transformation from ferrimagnetic to superparamagnetic behavior is observed from CEMS (conversion electron Mossbauer spectroscopy) with increase in fluence from 2.5×-1012 to 1.3x-1013 ions/cm2.Abstract:
Nanocrystalline Li0.25Mg0.5Mn0.1Fe2.15O4 ferrite thin films, prepared by R.F. magnetron sputtering technique, are irradiated with 190 MeV Au14+ ions. The significant behavioural changes in magnetic and electrical properties of thin films after swift heavy ion irradiation confirm the formation of stable defects. A transformation from ferrimagnetic to superparamagnetic behaviour is observed from CEMS (conversion electron Mossbauer spectroscopy) with increase in fluence from 2.5 × 1012 to 1 × 1013 ions/cm2. The resistivity initially increases after irradiation till the fluence reaches 1 × 1012 ions/cm2 and then reduces with further increase in fluence. We have also studied the X-ray diffraction pattern with fluence variation. A possible explanation of the above results on the basis of thermal spike model is presented. These effects are mainly due to amorphized latent tracks and variation in the cation distribution due to heavy ion irradiation.read more
Citations
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Observation of size dependent attributes on the magnetic resonance of irradiated zinc ferrite nanoparticles
TL;DR: In this article, a series of zinc ferrite nanoparticles having different crystallite sizes ranging from 12 to 62nm have been synthesized by using the nitrates of cations and the citric acid as the host.
Irradiation effects on nanocrystalline materials
TL;DR: In this paper, a review of the irradiation effects of nanocrystalline materials with grain size below 100 nm has been conducted, and it has shown that nanocrystine materials have a great potential to increase irradiation resistance in future reactor because of a large fraction of grain boundaries or interfaces that could absorb and annihilate mobile defects produced during irradiation.
Journal ArticleDOI
Swift heavy ion irradiation induced modifications in magnetic and dielectric properties of Mn–Ca ferrite
S. N. Dolia,P. K. Sharma,M. S. Dhawan,Sudhish Kumar,Arun S. Prasad,Arvind Samariya,S. P. Pareek,R.K. Singhal,K. Asokan,Y.T. Xing,M. Alzamora,E. Saitovitach +11 more
TL;DR: In this article, the effects of 200 MeV Ag 15+ ion irradiation on structural, magnetic and dielectric properties of nanocrystalline Mn-Ca ferrite have been investigated.
Journal ArticleDOI
Irradiation effects on nanocrystalline materials
TL;DR: In this paper, a review of the irradiation effects of nanocrystalline materials with grain size below 100 nm has been conducted, and it has shown that nanocrystine materials have a great potential to increase irradiation resistance in future reactor because of a large fraction of grain boundaries or interfaces that could absorb and annihilate mobile defects produced during irradiation.
Journal ArticleDOI
Study of 200 MeV Ag15+ ion induced amorphisation in nickel ferrite thin films
TL;DR: In this paper, thin films of nickel ferrite of thickness ∼100 and 150nm were deposited by pulsed laser deposition and irradiated with a 200 MeV Ag 15+ beam of three fluences.
References
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Journal ArticleDOI
The Se sensitivity of metals under swift-heavy-ion irradiation: a transient thermal process
TL;DR: In this paper, the effect of the electronic stopping power (Se) in metals irradiated by swift heavy ions was investigated in the framework of the thermal-spike model, and the effect on the lattice temperature induced by swift-heavy ion irradiation was calculated.
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General features of latent track formation in magnetic insulators irradiated with swift heavy ions
TL;DR: A thermal spike model is proposed for the analysis of latent track formation in insulators and good agreement is found with literature data on latent tracks in magnetic insulators.
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Swift heavy ions in insulating and conducting oxides: tracks and physical properties
TL;DR: In this paper, the effect of the irradiation temperature, the crystallographic orientation, the initial electrical resistivity and the oxygen stoichiometry on the damage morphology of oxide materials has been investigated.
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Particularities of Heat Conduction in Nanostructures
TL;DR: In this article, particularities associated with phonon heat conduction in nanostructures, the applicability of the Fourier law, and the implications of nanoscale heat transfer effects on nanotechnology are discussed.
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Tracks of high energy heavy ions in solids
TL;DR: In this paper, tracks of high energy heavy ions produced in some materials were made with electron microscope in order to clarify the governing factors and mechanisms for track formation, and correlations between the sizes of the tracks and the energy depositions of incident ions were examined for the tracks produced in the evaporated thin films of germanium, silicon and titanium, and crystals of MoO3 and MoS2.