200 MeV Ag+15ion irradiation-induced modifications in structural, magnetic and dielectric properties of nanoparticles of Cu0.2Zn0.8Fe2O4ferrite
| Autor: | M. S. Dhawan, S. P. Pareek, Sudhish Kumar, P. K. Sharma, K. Asokan, S. N. Dolia, Arun S. Prasad, Arvind Samariya |
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| Rok vydání: | 2013 |
| Předmět: |
Nuclear and High Energy Physics
Radiation Materials science Ion beam Spinel Analytical chemistry Dielectric engineering.material Condensed Matter Physics Condensed Matter::Materials Science Swift heavy ion Nuclear magnetic resonance engineering Ferrite (magnet) General Materials Science Irradiation Saturation (magnetic) Superparamagnetism |
| Zdroj: | Radiation Effects and Defects in Solids. 168:537-546 |
| ISSN: | 1029-4953 1042-0150 |
| DOI: | 10.1080/10420150.2013.792816 |
| Popis: | The present investigation aims at studying the effect of swift heavy ion irradiation on the structural, magnetic and dielectric properties of the nanocrystalline Cu0.2Zn0.8Fe2O4 spinel ferrite. The sample was synthesised using the sol–gel technique and then irradiated with the 200 MeV Ag+15 ion beam. The Rietveld profile refinement of the X-ray diffraction patterns confirmed the cubic spinel structure of samples. The spherical morphology revealed through transmission electron microscopy images was consistent with the crystalline diameter. The overall magnetic behaviour pointed towards superparamagnetic relaxation at room temperature along with the significant increase in saturation magnetisation, coercivity and blocking temperature after irradiation. This could be attributed to the slight increase in the particle size and ion-induced modifications on the surface states of the nanoparticles. The enhancement in dielectric constant and loss tangent after irradiation could be attributed to the available Fe+2 ... |
| Databáze: | OpenAIRE |
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