Structural and magnetic variations in Ba_0.5Sr_0.5Fe₉Ce₁Al₂O₁₉ hexaferrites at different sintering temperatures

Abstract

M-type hexaferrites has attracted researchers due to their ordinary magnetic properties and utilization as media for magnetic recording and microwave devices. In this study we have synthesized Ba0.5Sr0.5Fe9Ce1Al2O19 via conventional ceramic route. The synthesized material is treated against different temperatures and investigated structurally and magnetically by using several techniques such as X-ray diffraction, Scanning electron microscopy, and VSM respectively. Morphology of samples confirms the absence of secondary phases and uniform distribution of particles. X-ray diffraction patterns confirms the formation of pure phase of Hexaferrites. Microstructural analyses show the decrease in porosity and dislocations among sintered samples. Magnetic properties for the samples show a decrease in Ms and Mr with increasing temperature from 1225 °C to 1310 °C, while coercivity shows an increase with increasing temperature and maximum coercivity is observed at 1290 °C. The trends and occurrences can be well-linked to the structural variations and sintering effects. The results suggest that material can be used in various magnetic applications such as Recording media, and memory devices.

Structural and magnetic properties of BaFe9.95Al2Mg0.05O19tuned through sintering temperature

“…The results showed that there were no secondary phases in the material and that the hexagonal shape of the particles was evident in the micrographs. The SEM images in figure 2 was also confirmed that the samples were homogenously and uniformly distributed [18,30]. Pores present in the images showed the removal of PVA binder.…”

“…The magnetic properties of M-type hexaferrites can be altered by partially substituting Ba 2+ and/or Sr 2+ ions with rare Earth ions including La 3+ , Nd 3+ , and Ce 3+ etc [1-3, 10, 12-15, 24]. In addition to ion substitution, the magnetic properties of M-type hexaferrites can also be influenced by the sintering temperature [25][26][27][28][29][30][31].…”

Exploring the structural and magnetic trends in Ba0.9Sm0.1Fe12−xAlxO19 M-type Hexaferrites

“…It was observed that negligible change was found in the grain size after the introduction of dopants. It implies that in the current scenario doping may involve miscellaneous shapes as compared to size [23]. The average grain size was observed from 500 to 2500 nm.…”

Structural and magnetic conduct in Sm and Al substituted Ba0.9Sm0.1Fe10Al2O19M-type hexaferrites at different sintering temperatures

“…Few studies published have shown the importance and effects of sintering temperature on magnetic and structural properties of Hexa ferrites [27,28]. In our previous work we showed effects of different sintering temperature on magnetic properties of doped barium hexaferrites [29].…”

“…follow the JCPDS#43-0002. The results showed minor change in the intensity also upon the introduction of dopant [31][32][33]. Lattice parameters were obtained using reitveld refinement analysis.…”