Structural and magnetic response of Mn substituted Co2 Y-type barium hexaferrites

• Published in: Journal of alloys and compounds Vol. 686; pp. 1017 - 1024
• Main Authors: Adeela, N., Khan, U., Iqbal, M., Riaz, S., Irfan, M., Ali, H., Javed, K., Bukhtiar, I., Maaz, K., Naseem, S.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 25.11.2016
• Subjects: Hydrothermal method; Magnetic properties; Magneto-crystalline anisotropy; Y-type hexa-ferrites (Co2Y); Hydrothermal method; Y-type hexa-ferrites (Co2Y); Magnetic properties; Magneto-crystalline anisotropy
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2016.06.239

In present work, a series of Ba2Co2−xMnxFe12O22 nanoparticles (x = 0.0, 0.1, 0.3, 0.5, 0.7, and 0.9) has been synthesized by hydrothermal method. Effect of Mn substitution on structural, microstructure and magnetic properties has been investigated in detail. X-ray diffraction (XRD) and Fourier transform infrared (FT-IR) analyses confirmed the formation of Y-type hexagonal ferrite structure. Morphology and chemical composition studies performed by Scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) spectroscopy conformed that with increasing Mn concentration grain size increases from few nanometers to micrometer range. Furthermore, magnetic analyses revealed that with increasing Mn concentration at octahedral and tetrahedral sites the coercivity and squareness were found to increase from 455Oe to 2550Oe, and 0.26 to 0.56, respectively. Theoretical approach was also used to calculate saturation magnetization of synthesized samples. The synthesized nanoparticles with enhanced magnetic characteristics are ideal candidate for their use in perpendicular magnetic recording and high frequency applications. •Ba2Co2−xMnxFe12O22 (0 ≤ x < 1) nanoparticles have been synthesized by hydrothermal route.•Lattice parameters increases with increasing manganese content in Co2 Y-type barium ferrite nanoparticles.•XRD and FTIR analyses confirm the formation of Y-type hexagonal ferrite structure.•Ms follows law of approach to saturation to calculate theoretical value of saturation magnetization.•Hc is found to increase with doping content with maximum value of 2.55 kOe at x = 0.9.