Effects of Dy on structural, dielectric and magnetic properties of Ni-Sr-Y co-precipitated hexaferrites. Issue 18 (15th December 2018)

• Record Type: Journal Article
• Authors: Khan, Muhammad Azhar; Nadeem, Mubashar; Abbas, Shakeel; Akhtar, Majid Niaz; Lodhi, Maria Yousuf
• Is Part Of: Ceramics international. Volume 44:Issue 18(2018)
• Page Start: 22255
• Page End: 22261
• Publication Date: 2018-12-15
• Subjects: Ni2Y hexa ferrites -- Co-precipitation -- Phase analysis -- Spectral study -- Dielectric properties -- Magnetic properties; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2018.08.347
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Dysprosium (Dy) doped Y-type strontium hexa ferrites of the following composition Ni2 Sr2 Dyx Fe12-x O22 where (x = 0.00, 0.05, 0.10, 0.15, 0.20, 0.25) were prepared through co-precipitation process. Phase analysis of the investigated samples was carried out by characterizing through (XRD) X-ray diffraction which confirmed the pure phase of Y-type hexaferrites. Dysprosium ion doping influenced lattice parameters i.e. lattice constants (a, c), crystallite size, (c/a) ratio, cell volume and porosity. The calculated crystallite size was in the range of 88–159 nm. FTIR plots showed that the characteristics bonds of Ni2 Sr2 Dyx Fe12-x O22 are appreciably influenced by the incorporation of Dy contents. The results of dielectric parameters revealed that dielectric constant, dielectric loss, tanloss were decreased with an increase in frequency. At 6.0 × 10 8 Hz, dielectric constant decreased from 5.55 to 3.69 with increasing Dy concentration. Owing to Maxwell-wagner type relaxation, the decrease in dielectric constant was noticed at higher frequency. The smaller dielectric constants and dielectric losses make these materials suitable for their applications in microwave devices fabrication.