The Influence of Zn Substitution on Physical Properties of CoFe2O4 Nanoparticles

被引:6
|
作者
Szatmari, Adam [1 ]
Bortnic, Rares [1 ]
Souca, Gabriela [1 ]
Hirian, Razvan [1 ]
Barbu-Tudoran, Lucian [2 ,3 ]
Nekvapil, Fran [1 ,4 ]
Iacovita, Cristian [5 ]
Burzo, Emil [1 ]
Dudric, Roxana [1 ]
Tetean, Romulus [1 ]
机构
[1] Babes Bolyai Univ, Fac Phys, Kogalniceanu 1, Cluj Napoca 400084, Romania
[2] Babes Bolyai Univ, Fac Biol & Geol, Electron Microscopy Ctr Prof C Craciun, 5-7 Clinicilor St, Cluj Napoca 400006, Romania
[3] Natl Inst Res & Dev Isotop & Mol Technol, Integrated Electron Microscopy Lab, 67-103 Donat St, Cluj Napoca 400293, Romania
[4] Babes Bolyai Univ, RDI Inst Appl Nat Sci IRDI ANS, RDI Lab Appl Raman Spect, Fantanele 42, Cluj Napoca 400293, Romania
[5] Iuliu Hatieganu Univ Med & Pharm, Fac Pharm, Dept Pharmaceut Phys Biophys, 6 Pasteur St, Cluj Napoca 400349, Romania
关键词
zinc-cobalt ferrite nanoparticles; Raman measurements; magnetic properties; IRON-OXIDE NANOPARTICLES; FERRITE NANOPARTICLES; MAGNETIC-PROPERTIES; DIELECTRIC-PROPERTIES; RAMAN-SPECTROSCOPY; COBALT;
D O I
10.3390/nano13010189
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Co1-xZnxFe2O4 nanoparticles (0 <= x <= 1) have been synthesized via a green sol-gel combustion method. The prepared samples were studied using X-ray diffraction measurements (XRD), transmission electron microscopy (TEM), Raman, and magnetic measurements. All samples were found to be single phases and have a cubic Fd-3m structure. EDS analysis confirmed the presence of cobalt, zinc, iron, and oxygen in all studied samples. Raman spectra clearly show that Zn ions are preferentially located in T sites for low Zn concentrations. Due to their high crystallinity, the nanoparticles show high values of the magnetization, which increases with the Zn content for x < 0.5. The magnetic properties are discussed based on Raman results. Co ferrite doped with 30% of Zn produced the largest SAR values, which increase linearly from 148 to 840 W/g(MNPs) as the H is increased from 20 to 60 kA/m.
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页数:14
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