Co1?xZnxFe2O4 (0 ≤ x ≤ 1) nanocrystalline solid solution prepared by the polyol method: Characterization and magnetic properties |
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| Authors: | L Ben Tahar H Basti F Herbst LS Smiri JP Quisefit N Yaacoub JM Grenèche S Ammar |
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| Affiliation: | 1. SSMI (99/UR12-30), Faculté des Sciences de Bizerte, 7021 Jarzouna, Tunisia;2. ITODYS, Université Paris Diderot, CNRS UMR-7086, 75205 Paris, France;3. LISA, Université Paris Diderot, Université Paris 12, CNRS UMR-7583, 75205 Paris, France;4. LUNAM, Université du Maine, IMMM CNRS UMR-6283, 72085 Le Mans, France;1. Department of Mechanical Engineering, J.N.N. College of Engineering, Shivamogga 577 204, Karnataka, India;2. Research and Development Department, Central Institute of Plastics Engineering and Technology, GIDC, Vatva, Ahmedabad 382 445, Gujarat, India;3. BIN Fusion Research Centre, Department of Polymer and Nano Engineering, Chonbuk National University, Jeonju, Jeonbuk 561-756, Republic of Korea;4. Department of Polymer Science and Technology, Sri Jayachamarajendra College of Engineering, Mysore 570 006, Karnataka, India;1. P. D. Patel Institute of Applied Science, Charotar University of Science & Technology, CHARUSAT Campus, Changa 388421, India;2. K. K. Shah Jarodwala Maninagar Science College, Ahmedabad, India;3. UGC-DAE Consortium for Scientific Research, Mumbai Centre, R5 Shed, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India;1. College of Mining Engineering, Taiyuan University of Technology, Taiyuan, 030024, China;2. Key Laboratory of In-situ Property-Improving Mining of Ministry of Education, Taiyuan University of Technology, Taiyuan, 030024, China;3. School of Chemical Engineering, University of Queensland, Brisbane, Queensland, 4072, Australia |
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| Abstract: | Highly crystalline stoichiometric Co1?xZnxFe2O4 (0 ≤ x ≤ 1) nanoparticles were successfully synthesized by the polyol process. X-ray diffraction (XRD), X-ray fluorescence spectroscopy (XRF), transmission electron microscopy (TEM), infrared spectroscopy (IR), zero-field 57Fe Mössbauer spectrometry and magnetic measurements using a SQUID magnetometer were employed to investigate the effect of the substitution of Zn2+ ions for Co2+ ones on the structure, and the magnetic properties of the cobalt ferrite, CoFe2O4. The unit cell parameter almost increases linearly with increasing Zn concentration, x, following Vegard's law. The red and blue shifts observed for the metal-oxygen ν1 and ν2 IR vibration bands, respectively, were consistent with the preferential entrance of Zn2+ ions in tetrahedral sites. Besides, detailed magnetic investigation in correlation with the cation distribution has been reported. All the particles exhibit superparamagnetic behaviour at room temperature. In addition, the magnetic characteristics (blocking temperature, saturation magnetization, coercivity, Curie temperature) clearly depend on the chemical composition and cation distribution. Both the blocking temperature and Curie temperature decrease drastically with Zn composition, x, increase. Further, the saturation magnetization follows an almost bulk-like behaviour with values notably larger than that of the bulk, mainly attributed to cation distribution deviation. |
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