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- W821624465 abstract "Abstract Ni nanoparticles embedded in the SiO 2 host are prepared by sol–gel route. Studies on X-ray diffraction and transmission electron microscopy confirm chemically single phase, good crystallinity and formation of nearly spherical nanoparticles with average size of 18 nm. Temperature dependence of zero field cooled (ZFC) magnetization shows a broad maximum around 230 K ( T max ), below which memory effect is observed in the field cooled (FC) and zero field cooled (ZFC) modes. A strong frequency dependence of ac susceptibility is observed around T max and the shift of peak position with frequency satisfies the dynamical scaling law with parameters close to that observed for atomic spin-glasses. At low temperature signature of spin-glass (SG) like behaviour is confirmed from the observed memory effect in the ZFC and isothermal remanent magnetization studies. The SG like behaviour is also apparent from the analysis of the relaxation mechanism." @default.
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- W821624465 date "2015-11-01" @default.
- W821624465 modified "2023-09-26" @default.
- W821624465 title "Spin-glass like behaviour in strongly interacting nanocrystalline Ni embedded in SiO2" @default.
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- W821624465 doi "https://doi.org/10.1016/j.jmmm.2015.06.071" @default.
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