Journal ArticleDOI
In situ monitoring of electrical resistance of nanoferrite thin film irradiated by 190 MeV Au14+ ions
TLDR
In this article, a highly resistive nanocrystalline thin film of Li0.25Mg0.5Mn0.1Fe2.15O4, deposited by RF magnetron sputtering technique on Si(1/0/0) substrate, is irradiated with 190 MeV Au14+ ions.Abstract:
A highly resistive nanocrystalline thin film of Li0.25Mg0.5Mn0.1Fe2.15O4, deposited by RF magnetron sputtering technique on Si(1 0 0) substrate, is irradiated with 190 MeV Au14+ ions. To probe the swift heavy ion induced modifications in the electrical properties in the film an in situ measurement of electrical resistance using two-probe method is carried out. We observe the value of resistivity comes down drastically from 1.5 × 108 to 1 × 105 Ω cm after irradiation at the fluence of 1 × 1013 ions/cm2. In XRD spectra after irradiation no previous spinel peaks are observed. No loss in oxygen content with fluence is observed. We have presented the observed phenomenon as an effect of formation of amorphized latent tracks on the basis of thermal spike model.read more
Citations
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Journal ArticleDOI
Magnetic and microwave absorbing properties of Co2+ substituted nickel–zinc ferrites with the emphasis on initial permeability studies
TL;DR: In this paper, the authors showed that the saturation magnetization of cobalt substituted Ni-Zn ferrites is higher than that of pure Ni−Zn- ferrite.
Journal ArticleDOI
Ion irradiation effects in nanocrystalline TiN coatings
TL;DR: In this paper, the ion irradiation effects in nanocrystalline TiN coatings as a function of grain size are reported, and it is shown that damage accumulation in the TiN films reduces as the grain size reduces.
Journal ArticleDOI
Structural, dielectric and enhanced soft magnetic properties of lithium (Li) substituted nickel ferrite (NiFe2O4)nanoparticles
TL;DR: Li-Ni Fe 2 O 4 NPs have been prepared by a simple chemical co-precipitation method as discussed by the authors, which demonstrates a face centered cubic spinel phase.
Journal ArticleDOI
The role of copper ions on the structural and magnetic characteristics of MgZn ferrite nanoparticles and thin films
Ali Ghasemi,Azadeh Ashrafizadeh,Andrea Paesano,Carla Fabiana Cerqueira Machado,Sagar E. Shirsath,Xiaoxi Liu,Akimitsu Morisako +6 more
TL;DR: In this article, the morphologies of nanoparticles were observed by transmission electron microscope (TEM) and the Mossbauer spectroscopy (MS) was employed to determine the site preference of the constitutive elements.
Journal ArticleDOI
Surface studies on 100 MeV Ag7+ ions and 150 MeV Ni11+ ions irradiated nanocrystalline ferrite thin films
TL;DR: In this paper, the effect of swift heavy ion bombardment on surface morphologies of nanocrystalline ferrite thin films using atomic force microscopy (AFM) technique was systematically studied.
References
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Journal ArticleDOI
Magnetic properties of ultrafine ferrite particles
TL;DR: In this article, the morphology and magnetic properties of ultrafine ferrite particles prepared by coprecipitation are studied, and it is shown that saturation magnetization decreases sharply when the particle size is reduced below 10 nm, and this decrease is related to the crystalline magnetic anisotropic constant K 1.
Journal ArticleDOI
Size-dependent Curie temperature in nanoscale MnFe2O4 particles.
TL;DR: The Curie temperature of ferrimagnetic nanoscale particles by means of direct measurement of the magnetization is determined using the finite-size-scaling formula.
Journal ArticleDOI
Instability of irradiation induced defects in nanostructured materials
TL;DR: In this article, the defect evolution in nanocrystalline Pd and ZrO2 during energetic particle irradiation is examined with emphasis on the correlation of defect density to the grain size.
Journal ArticleDOI
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.
Journal ArticleDOI
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.
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