Effect of Dy-Co on physical and magnetic properties of X-type hexaferrites (Ba2−Dy Cu2Fe28−Co O46)

Self Cite

Current study describes the structural and magnetic properties of Ba0.9Sm0.1Fe12-xAlxO19 (x=0.0, 0.5, 1.0, 2.0, 3.0) M-type hexaferrites. Conventional ceramic route was implied to prepare all the nominal samples. Morphological analysis suggested the non-presence of secondary phases as well as formation of the hexaferrites material. X-ray Diffraction technique was used for structural analysis from which microstructural parameters are calculated and discussed. Magnetic properties are measured at room temperature. The saturation magnetization (Ms) and coercivity (Hc) values shows a cyclic and converse trend for synthesized samples. Firstly, a decrease in Ms and increase in Hc was observed up to intermediate dopant incorporation, and becomes converse for higher doping levels. The maximum coercivity and minimum magnetization is observed for Ba0.9Sm0.1Fe11Al1O19. The c/a and Mr/Ms ratio suggest the formation of perfect M-type hexaferrites. This work suggests that synthesized material is a good option for magnetic applications e.g., transformer and inductor cores, microwave devices, recording heads, and magnetic shielding.

Section: Structural Analysismentioning

confidence: 99%

Exploring the structural and magnetic trends in Ba_0.9Sm_0.1Fe_12−xAl_xO₁₉ M-type Hexaferrites

Asif¹,

Ranjha²,

Ghori³

et al. 2022

Self Cite

“…All the values obtained for these parameters are displayed in table 1. Finally, the dislocation density was calculated by using equation (6) [45,46].…”

Section: Morphological and Structural Analysismentioning

confidence: 99%

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

Makhdoom¹,

Ranjha²,

Ghori³

et al. 2021

Self Cite

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.

“…For the purpose, x-ray density, bulk density and porosity (%) were determined for BBFO and BBFCO samples and are presented in table 2. A detailed description of the calculations can be examined elsewhere [25,26,35,36].…”

Section: Resultsmentioning

confidence: 99%

Facile synthesis and characterizations of Co²⁺ doped Bi_0.8Ba_0.2FeO₃ nano-crystalline multiferroic ceramics

Awan¹,

Ahmad²,

Waheed³

et al. 2021

Self Cite

Barium doped BiFeO 3 and Cobalt doped Bi 0.8 Ba 0.2 FeO 3 (BBFO) nanocrystalline multiferroic ceramics were prepared by the sol-gel technique. Rhombohedral symmetry was observed throughout the compositions, and the effect of sintering temperature was observed on volume and grain size of BBFO at (400 °C-700 °C) using x-ray profiles. The final sintering temperature for Cobalt doped (BBFCO) was estimated by using thermal analysis. DC I-V (current-voltage) analysis was used to analyze the leakage current density and conduction mechanism of ceramics. The temperature-dependent electrical resistivity measurements confirmed the metallic behaviour of Co 2+ doped BBFO multiferroics at low temperatures, and transition temperature T MI was also found to be Cobalt concentration-dependent. The dielectric response, electrical impedance, and Modulus of the material were measured in the frequency range 100Hz to 2MHz at room temperature. Trends or occurrences may be attributed to oxygen vacancies arise due to doping content.