Synthesis of Ni/NiO nanocomposites by hydrothermal-assisted polyol process and their magnetic properties as a function of annealing temperature

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24620%2F15%3A00001528" target="_blank" >RIV/46747885:24620/15:00001528 - isvavai.cz</a>
Result on the web
<a href="http://www.sciencedirect.com/science/article/pii/S0032591015000121" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0032591015000121</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.powtec.2015.01.002" target="_blank" >10.1016/j.powtec.2015.01.002</a>

Result language
angličtina
Original language name
Synthesis of Ni/NiO nanocomposites by hydrothermal-assisted polyol process and their magnetic properties as a function of annealing temperature
Original language description
In this study, the composition, morphology and magnetic properties of Ni/NiO nanocomposites synthesized by hydrothermal-assisted polyol process were studied as a function of annealing temperature. Upon increasing the annealing temperature from 300 to 500°C, the concentration of NiO was found to increase at the expense of metallic Ni-core and a complete transformation of NiO was evidenced at 500 °C. All the Ni/NiO nanocomposites demonstrated strong exchange bias (EB); however, the mechanism of the EB effect seems to be different in each case. For the samples annealed at low temperatures: 300 and 400 °C, the EB effect arises from the coupling at the Ni/NiO interface; whereas for the samples annealed above 400 °C, the EB effect is due to the coupling between frozen magnetic moments of NiO-shell and typical antiferromagnetic NiO-core. Enhancement in the EB and large coercivity were obtained for the sample annealed at 500 °C. Through this study, it has been demonstrated that the EB effect
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DE - Earth magnetism, geodesy, geography
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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