The Variation of Magnetic Properties of Nickel Ferrite by Annealing

Autor:	S. Farjami Shayesteh, H. Moradmard
Rok vydání:	2015
Předmět:	Crystallinity Materials science Nuclear magnetic resonance Annealing (metallurgy) Spinel Beta ferrite Analytical chemistry engineering Ferrite (magnet) Crystallite Coercivity engineering.material Fourier transform infrared spectroscopy
Zdroj:	Manufacturing Science and Technology. 3:141-145
ISSN:	2333-2697 2333-2735
Popis:	Nickel ferrite nanoparticles were synthesized by Co-precipitation method. The prepared powder was annealed at 500℃, 700℃ and 900℃. XRD analysis was used for composition and structure investigation. The detection and confirmation of the chemical bond in spinel ferrites were investigated by Fourier transmission infrared spectra (FTIR). Also the magnetic properties of the samples were measured by using a vibrating sample magnetometer (VSM). The XRD analysis revealed a pure ferrite phase with high crystallinity. The average crystallite size calculated by Sherrer's equation resulted in variation crystallite size from 9 to 21 nm depending upon the annealing temperature of the samples. FTIR analysis shows the presence of two vibrational bonds between 400-650 cm -1 corresponding to metal-oxygen interaction at tetrahedral and octahedral sites, respectively. Increasing the annealing temperature gave rise to the enhancement of saturation magnetization from 6 to 31emu/gr and the variation of coercivity between 2 and 80Oe.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::41ec914ca08c3190fdb9158b54483ee7 https://doi.org/10.13189/mst.2015.030411 Zobrazit plný text záznamu