Investigation of microstructural and magnetic properties of Ca2+ doped strontium hexaferrite nanoparticles

Journal of King Saud University: Science

Mohaseen S. Tamboli¹  Jahangeer Ahmed²  Varinder Kaur³  Mankamal Preet Kaur³  Parambir Singh Malhi³  Sachin Kumar Godara³  Mandeep Singh⁴  Swati Verma⁴  Ashwani Kumar Sood⁵  Rohit Jasrotia⁶ 

[1] Corresponding authors.;Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia;Department of Chemistry, UGC Centre for Advanced Studies-II, Guru Nanak Dev University, Amritsar, Punjab 143005, India;Department of Physics, Guru Nanak Dev University, Amritsar, Punjab 143005, India;School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea;School of Physics and Materials Science, Shoolini University of Biotechnology and Management, Bajhol, Solan, Himachal Pradesh, India;

关键词: Sol-gel processes;    Strontium hexaferrite;    Dielectric properties;    Magnetic properties;    Hard magnets;   

DOI  :  

来源: DOAJ

【 摘 要 】

The effect of Ca2+ ions doping on the structure, magnetic properties, and surface morphology of Sr1-xCaxFe12O19 (x = 0.0 to 0.5 with step size 0.1) hexaferrite nanoparticles synthesized using the sol–gel auto-combustion technique was investigated in the current study. The phase purity of synthesized samples is confirmed by XRD data plots up to x = 0.2, after which α-Fe2O3 was observed as a secondary phase in all concentrations. The micrographs from FESEM show that with the increase in the concentration of Ca2+ dopant, the average grain size increases from ≈125 nm to ≈240 nm. The intensity of secondary phase Raman peaks increases with increasing dopant ion concentration beyond x = 0.2. The coercivity value varies between 5292 and 5828 Oe as the Ca2+ dopant increases. A maximum (72.63 emu/g) value of saturation magnetization (Ms) have been obtained in samples at x = 0.2. Such substances can be utilized for making permanent magnets applications.

【 授权许可】

Unknown