Structural and magnetic properties of strontium substituted NiZn ferrite nanopowders |
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| Affiliation: | 1. Vocational School of Health Services, Radiotherapy Prog., Okan University, Istanbul, Turkey;2. Department of Physics, Sakarya University, Esentepe, 54187 Sakarya, Turkey;1. Université de Carthage, Faculté des Sciences de Bizerte, UR11ES30, Synthèse et Structures de Nanomatériaux, 7021, Jarzouna, Tunisie;2. Université de Toulouse, LPCNO, INSA CNRS UMR 5215, 135 av. de Rangueil, 31077 Toulouse Cedex 4, France;3. Université de Carthage, Faculté des Sciences de Bizerte, Laboratoire de Physique des Matériaux, 7021, Jarzouna, Tunisie;1. Instituto Universitario de Tecnología Cerámica, Departamento de Ingeniería Química, Universitat Jaume I, Castellón, 12071 Spain;2. Escuela Técnica Superior de Ingenieros de Telecomunicación, Departamento de Comunicaciones Universidad Politécnica de Valencia, Valencia, 46022 Spain;1. TUBITAK-UME, National Metrology Institute, PO Box 54, 41470, Gebze, Kocaeli, Turkey;2. Department of Physics, Gebze Technical University, 41400, Kocaeli, Turkey;3. Department of Computer Engineering, Istanbul Sabahattin Zaim University, Halkali Cad. No. 2, 34303, K. Çekmece-Istanbul, Turkey;4. Chemistry Department, Fatih University, 34500, B. Çekmece-Istanbul, Turkey;1. Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, KSA;2. Physics Department, Faculty of Science, Zagazig University, Zagazig, Egypt;1. Department of Physics, The LNM Institute of Information Technology, Jaipur, 302031, India;2. Bhabha Atomic Research Centre, Mumbai, 400094, India |
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| Abstract: | Sr-substituted NiZn ferrite nanopowders, Ni0.5-xZn0.5SrxFe2.0O4 (0≤x≤0.20), were synthesized by the sol-gel auto-combustion method. The effects of Sr substitution on the structural and magnetic properties have been investigated. Differential thermal analysis-thermogravimetry (DTA-TG), X-ray diffraction (XRD) and vibrating sample magnetometer (VSM) measurements were used to characterize chemical, structural and magnetic properties. The DTA-TG results indicate that there are three steps of combustion process. XRD results indicate that the lattice parameter increases, and the average crystallite size decreases with increasing Sr substitution. The Sr2FeO4 and SrFe12O19 impurity phases formed with excess Sr substitution. The saturation magnetization monotonically decreases with the increase of Sr substitution. Meanwhile, the coercivity initially decreases with the increase of Sr substitution when x≤0.15, and increases when x>0.15. |
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| Keywords: | NiZn ferrite nanopowder Sol-gel auto-combustion process Sr substitution Structure Magnetic property |
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