Abstract
The structure and magnetic properties of Ce0.04Tm2.96CrxFe5-xO12 (x = 0–0.30) prepared via sol-gel route were studied in this paper. X-ray diffraction (XRD) data and Raman spectra (RS) data revealed that Cr and Ce strongly enter the Tm3Fe5O12 (TmIG) structure. RS results showed the characteristic peaks of TmIG garnets ferrites. The X-ray photoelectron spectroscopy (XPS) results in Ce0.04Tm2.96Cr0.25Fe4.75O12 revealed that single valence state of iron was “+3.” Moreover, by comparing Ce0.04Tm2.96Fe5O12 with Cr-doped sample, saturation magnetization (Ms) was increased, which may be related to the fact that Cr3+ ions occupied octahedral position (a) to increase the effective moments formed by Fe3+ cations. The Ms of the sample x = 0.15 reaches a maximum of 18.24 emu/g. Furthermore, these nanoferrites with different magnetic properties and structures may be used for longitudinal recording and sensor applications.
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