Temperature-Dependent Magnetic Response of Antiferromagnetic Doping in Cobalt Ferrite Nanostructures
| Autor: | Usman Khan, Shahzad Naseem, M. Iqbal, Adeela Nairan, Maaz Khan, Saira Riaz |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Materials science
co-precipitation ferrites zero field cooled (ZFC) and field cooled (FC) curves magnetic anisotropy General Chemical Engineering Analytical chemistry 02 engineering and technology 010402 general chemistry 01 natural sciences Article lcsh:Chemistry Condensed Matter::Materials Science Antiferromagnetism General Materials Science Fourier transform infrared spectroscopy Diffractometer Dopant 021001 nanoscience & nanotechnology 0104 chemical sciences Magnetic anisotropy Hysteresis Ferromagnetism lcsh:QD1-999 0210 nano-technology Néel temperature |
| Zdroj: | Nanomaterials, Vol 6, Iss 4, p 73 (2016) Nanomaterials; Volume 6; Issue 4; Pages: 73 Nanomaterials |
| ISSN: | 2079-4991 |
| Popis: | In this work MnxCo1−xFe2O4 nanoparticles (NPs) were synthesized using a chemical co-precipitation method. Phase purity and structural analyses of synthesized NPs were performed by X-ray diffractometer (XRD). Transmission electron microscopy (TEM) reveals the presence of highly crystalline and narrowly-dispersed NPs with average diameter of 14 nm. The Fourier transform infrared (FTIR) spectrum was measured in the range of 400–4000 cm−1 which confirmed the formation of vibrational frequency bands associated with the entire spinel structure. Temperature-dependent magnetic properties in anti-ferromagnet (AFM) and ferromagnet (FM) structure were investigated with the aid of a physical property measurement system (PPMS). It was observed that magnetic interactions between the AFM (Mn) and FM (CoFe2O4) material arise below the Neel temperature of the dopant. Furthermore, hysteresis response was clearly pronounced for the enhancement in magnetic parameters by varying temperature towards absolute zero. It is shown that magnetic properties have been tuned as a function of temperature and an externally-applied field. |
| Databáze: | OpenAIRE |
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