Structural, infrared and magnetic properties of Ni0.7Zn0.3Fe2O4+0.4wt%V2O5 synthesized using ceramic method

2021 ◽  
Author(s):  
M. S. Patil ◽  
A. G. Patil ◽  
D. P. Nandagawali ◽  
A. V. Raut ◽  
D. R. Shengule
Keyword(s):  
Magnetic Properties ◽  
Ceramic Method

Structural and Magnetic Hysteresis Properties of Co-Zr Substituted Hexagonal Barium Ferrites

2015 ◽  
Vol 7 (1) ◽  
pp. 1346-1351
Author(s):  
Ch.Gopal Reddy ◽  
Ch. Venkateshwarlu ◽  
P. Vijaya Bhasker Reddy
Keyword(s):  
Magnetic Properties ◽  
Single Phase ◽  
Magnetic Hysteresis ◽  
Grain Morphology ◽  
Hexagonal Structure ◽  
Ion Composition ◽  
X Ray Diffraction ◽  
Ceramic Method ◽  
Barium Ferrites ◽  
Xrd Patterns

Co-Zr substituted M-type hexagonal barium ferrites, with chemical formula BaCoxZrxFe12-2xO19 (where x = 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0), have been synthesized by double sintering ceramic method. The crystallographic properties, grain morphology and magnetic properties of these ferrites have been investigated by X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Vibrating Sample Magnetometer (VSM). The XRD patterns confirm the single phase with hexagonal structure of prepared ferrites. The magnetic properties have been investigated as a function of Co and Zr ion composition at an applied field in the range of 20 KOe. These studies indicate that the saturation magnetization (Ms) in the samples increases initially up to the Co-Zr composition of x=0.6 and decreases thereafter. On the other hand, the coercivity (Hc) and Remanent magnetization (Mr) are found to decrease continuously with increasing Co-Zr content. This property is most useful in permanent magnetic recording. The observed results are explained on the basis of site occupation of Co and Zr ions in the samples.

Magnetic Study on Divalent Ion Substituted Barium Hexaferrites

2021 ◽  
Vol 410 ◽  
pp. 714-719
Author(s):  
Denis Vinnik ◽  
Santhoshkumar Mahadevan ◽  
Puneet Sharma
Keyword(s):  
Magnetic Properties ◽  
Solid State ◽  
Barium Hexaferrite ◽  
Anisotropy Field ◽  
Magnetic Interaction ◽  
Ceramic Method ◽  
Saturation Magnetisation ◽  
State Ceramic ◽  
Saturation Remanence ◽  
Substituted Barium Hexaferrite

Magnetic properties of Co, Ni and Zn substituted barium hexaferrite (BaM) samples prepared by solid state ceramic method were studied. Saturation magnetisation were found higher for Zn-substituted BaM, whereas, coercivity is higher for Co2+ and Ni2+ ion substituted samples. Anisotropy field for all substituted samples was calculated by the law of approaching saturation. Remanence, squareness and thermomagnetic plot suggest Zn2+ ions restricts the magnetic interaction of various sites in BaM.

scholarly journals Structure and magnetic properties of Co-Zn substituted hexagonal ferrites

2018 ◽  
Vol 197 ◽  
pp. 02007
Author(s):  
Erfan Handoko ◽  
Anggoro B S ◽  
Iwan Sugihartono ◽  
Mangasi AM ◽  
Dini Siti Nurwulan ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Single Phase ◽  
Hexagonal Ferrites ◽  
X Ray Diffraction ◽  
Small Particles ◽  
Scanning Electron Microscopy Micrographs ◽  
Ceramic Method ◽  
X Ray ◽  
Structural And Magnetic Properties ◽  
Substitutional Effect

In In this study to understand the substitutional effect of Co-Zn on structural and magnetic properties of the BaFe12-2xCoxZnxO19 M-type hexagonal ferrites with concentration (x= 0.0, 0.2, 0.4, 0.6, 0.8, 1.0) were synthesized by the ceramic method. The results of x-ray diffraction show polycrystalline with single phase. Scanning electron microscopy micrographs shows the hexagonal ferrites that are composed of small particles with large porosity, roughly of spherical shapes. The substitution of Fe3+ ion by Co2+ and Zn2+ has changed magnetic properties of hexagonal ferrites.

Structure and Magnetic Properties of Co-Substituted Strontium Hexaferrite

2014 ◽  
Vol 979 ◽  
pp. 200-203 ◽  
Author(s):  
Pannipa Chaya ◽  
Tula Jutarosaga ◽  
Wandee Onreabroy
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Coercive Force ◽  
Crystallite Size ◽  
Strontium Hexaferrite ◽  
X Ray Diffraction ◽  
Ceramic Method ◽  
Lattice Constants ◽  
Structure Morphology ◽  
Soft Ferrite

The strontium hexaferrite (SrFe12O19) and Co-substituted strontium hexaferrite (SrCoFe11O19) were prepared by ceramic method. The milled mixture of Fe2O3, SrCO3 and CoO powders were calcined at 1100°C and pellets sintered at 1300°C in air. The crystal structure, morphology and magnetic properties of samples have been investigated by X-ray diffraction (XRD), scanning electron microscope (SEM) and vibrating sample magnetometer (VSM), respectively. The crystal structure of SrFe12O19 was hexaferrite with the crystallite size and the lattice constants a and c of 59.6 nm, 5.8 Å, and 23.0 Å, respectively. Also, the crystal structure of SrCoFe11O19 was hexaferrite with the crystallite size and the lattice constants a and c of 63.7 nm, 5.9 Å and 23.0 Å, respectively. The morphology of obtained samples changed from hexagonal rods to discs shape and grain sizes increased with the increase of doped Co in SrFe12O19. SrFe12O19 with the coercive force (Hc) of 2,133 Oe was classified as hard ferrite magnetic. While, Co-substituted strontium hexaferrite (SrCoFe11O19) was soft ferrite magnetic with coercive force of 64 Oe. Results indicated that magnetic properties of samples such as hard ferrite magnetic and soft ferrite magnetic showed great dependence on the cobalt additive in strontium.

scholarly journals A Comparative Study of Spinel ZnFe2O4 Ferrites Obtained via a Hydrothermal and a Ceramic Route: Structural and Magnetic Properties

2020 ◽  
Author(s):  
Xuesong Zhu ◽  
Chunxiang Cao ◽  
Shubing Su ◽  
A.L. Xia ◽  
Huiyan Zhang ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Comparative Study ◽  
Spinel Structure ◽  
Single Phase ◽  
Hydrothermal Process ◽  
Ceramic Method ◽  
Mixed Spinel ◽  
Structural And Magnetic Properties ◽  
Ceramic Route ◽  
Fe Ions

Abstract The spinel ZnFe2O4 specimens were obtained via a hydrothermal and a ceramic method, respectively, and their structural and magnetic properties were comparatively studied. It was found that all the specimens exhibited a single-phase and mixed spinel structure. The magnetism of specimens synthesized via the hydrothermal method is obviously greater than that of specimen prepared via the ceramic method. This can be ascribed to the occupancy of Fe ions resulted from the loss of Zn during the hydrothermal process.

Effect of Calcination Conditions on the Magnetic Properties of MnZn Ferrites Powders Produced by Co Precipitation

2005 ◽  
Vol 498-499 ◽  
pp. 119-124 ◽  
Author(s):  
S.R. Janasi ◽  
Daniel Rodrigues ◽  
Fernando José Gomes Landgraf
Keyword(s):  
Magnetic Properties ◽  
Nitrogen Atmosphere ◽  
Coprecipitation Method ◽  
Ceramic Method ◽  
Calcination Temperatures ◽  
Metallic Oxides ◽  
Fine Particle Size ◽  
Vibration Sample Magnetometry ◽  
Co Precipitation ◽  
Mnzn Ferrites

MnZn ferrites are conventionally produced by the ceramic method that involves the solid state reaction of metallic oxides or carbonates at high temperatures. The particles obtained by this method are rather large and non-uniform in size. In order to overcome the difficulties arising out of the ceramic process, the coprecipitation method has been used as an alternative route to produce chemically homogeneous powders with fine particle size. In this work MnZn ferrites powders were produced by the coprecipitation method. The calcination conditions, such as temperature (900oC to 1100oC) and atmosphere (air and nitrogen), were investigated. X ray diffractometry, scanning electron microscopy, thermomagnetic analysis and vibration sample magnetometry were used to characterize the obtained samples. The results indicated that when the samples were calcined in nitrogen atmosphere, the ferrite formation occurred at low calcination temperatures and presented better magnetic properties than those calcined in air.

Sign in / Sign up

Export Citation Format

Share Document