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- W4281476989 abstract "The magnetic properties of nanocrystalline MxFe3-xO4 ferrites with M=Fe, Co, and Zn were investigated. The data support a core-shell model, where the core is ferrimagnetically ordered, and the shell shows a spin glass type behavior. The reduced magnetizations of spin glass components follow an mg = (1 - b/H-1/2) field dependence. The b values are strongly correlated with the intensities of exchange interactions. The field dependences of the magnetoresistances of Fe3O4 and ZnxFe3-xO4 nanoparticles pellets, experimentally determined, are well described if instead of the core reduced magnetization, commonly used, that of the shell is taken into account. For similar compositions of the nanoparticles, identical b values are obtained both from magnetization isotherms and magnetoresistances studies. The half-metallic behavior of spinel Fe3O4 based nanoparticles is discussed comparatively with those of double perovskites." @default.
- W4281476989 created "2022-05-26" @default.
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- W4281476989 date "2022-05-23" @default.
- W4281476989 modified "2023-09-26" @default.
- W4281476989 title "New Insights on the Spin Glass Behavior in Ferrites Nanoparticles" @default.
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- W4281476989 doi "https://doi.org/10.3390/nano12101782" @default.
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