Temperature dependence of magnetic properties and site occupation of various barium ferrites

1990 ◽  
Vol 26 (1) ◽  
pp. 21-23 ◽  
Author(s):  
U. Meisen ◽  
A. Eiling
Keyword(s):  
Magnetic Properties ◽  
Temperature Dependence ◽  
Site Occupation ◽  
Barium Ferrites

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.

Effects of Ta2O5 addition on the microstructure and temperature dependence of magnetic properties of MnZn ferrites

2009 ◽  
Vol 321 (5) ◽  
pp. 438-441 ◽  
Author(s):  
Lezhong Li ◽  
Zhongwen Lan ◽  
Zhong Yu ◽  
Ke Sun ◽  
Ming Luo ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Temperature Dependence ◽  
Mnzn Ferrites

Temperature dependence of the magnetic properties of mono-dispersed Co0.5Zn0.5Fe2O4 microtubes derived from different templates

2018 ◽  
Vol 30 (3) ◽  
pp. 2809-2820
Author(s):  
Peng-zhao Gao ◽  
Zhi-bo Huang ◽  
Hang-bo Zheng ◽  
Xiao-pan Liu ◽  
Jin Wen ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Temperature Dependence

scholarly journals Impact of ZrO2 Additive on Microstructure, Magnetic Properties, and Temperature Dependence of the Initial Permeability of LiTiZn Ferrite Ceramics

2021 ◽  
Author(s):  
Andrey Malyshev ◽  
Anna B. Petrova ◽  
Anatoly P. Surzhikov
Keyword(s):  
Magnetic Properties ◽  
Temperature Dependence ◽  
Defect Structure ◽  
Initial Permeability ◽  
Experimental Temperature ◽  
Mathematical Treatment ◽  
Experimental Temperature Dependence ◽  
Average Grain Size ◽  
Soft Ferrite ◽  
Microstructure And Magnetic Properties

Abstract The effect of the diamagnetic ZrO2 addition on the microstructure and magnetic properties of LiTiZn ferrite ceramics, including the shape and parameters of the temperature dependence of the initial permeability, has been investigated. The defect structure of ferrite ceramic samples is assessed according to our earlier proposed method based on mathematical treatment of the experimental temperature dependencies of the initial permeability. The method is recommended for defects monitoring of soft ferrite ceramics and ferrite products. It was found that the defect structure of ferrite ceramics increased by 350% with an increase in the concentration of the ZrO2 additive in the range of (0–0.5) wt.%. In this case, for the same samples, the increase in the true physical broadening of reflections is only 20%, and the coercive force by 50%. Simultaneously, the maximum of the experimental temperature dependence of the initial permeability dropped by 45%. The microstructure of all samples is characterized with a similar average grain size according to the SEM data. However, samples with the 0.5wt.% of ZrO2 are characterized by the formation of conglomerates. A linear relationship was obtained between the defect structure and the width of the reflections, which indicates that this parameter is related to the elastic stress of ferrite ceramics.

scholarly journals FMR Study of Temperature Dependence of Magnetic Properties of Nanocrystalline 0.90(Fe2O3)/0.10ZnO

2011 ◽  
Vol 120 (6) ◽  
pp. 1070-1073 ◽  
Author(s):  
N. Guskos ◽  
S. Glenis ◽  
G. Zolnierkiewicz ◽  
J. Typek ◽  
D. Sibera ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Temperature Dependence

scholarly journals Магнитные взаимодействия в структуре фазы Ауривиллиуса Bi-=SUB=-5-=/SUB=-FeTi-=SUB=-3-=/SUB=-O-=SUB=-15-=/SUB=-

2022 ◽  
Vol 64 (2) ◽  
pp. 213
Author(s):  
С.Г. Ястребов ◽  
Н.А. Ломанова
Keyword(s):  
Magnetic Properties ◽  
Temperature Dependence ◽  
Phase Structure ◽  
Paper Analysis ◽  
Temperature Threshold ◽  
Spin Canting ◽  
Moriya Interaction

This paper analysis the temperature dependence of FC and ZFC magnetization for Bi5FeTi3O15 multiferroic. It has Aurivillius four-layer phase structure. The analysis evidence on the influence of the grains of this material on its overall magnetic properties. The lack of a dramatic temperature threshold in the FC(ZFC) dependences may result in spin canting induced by the Dzyaloshinskii-Moriya interaction.

Magnetic properties of laboratory synthesized magnetic fluid and their temperature dependence

1994 ◽  
Vol 132 (1-3) ◽  
pp. 153-158 ◽  
Author(s):  
R.V. Mehta ◽  
R.V. Upadhyay ◽  
B.A. Dasannacharya ◽  
P.S. Goyal ◽  
K.S. Rao
Keyword(s):  
Magnetic Properties ◽  
Temperature Dependence ◽  
Magnetic Fluid

NANOSCOPIC PHASE SEPARATION AND THE UNIVERSAL TRANSPORT AND MAGNETIC PROPERTIES OF HIGH Tc SUPERCONDUCTORS

1999 ◽  
Vol 13 (29n31) ◽  
pp. 3528-3531
Author(s):  
J. JUNG ◽  
H. YAN ◽  
H. DARHMAOUI ◽  
M. ABDELHADI
Keyword(s):  
Magnetic Properties ◽  
Phase Separation ◽  
Temperature Dependence ◽  
Current Density ◽  
Low Temperatures ◽  
Energy Barrier ◽  
Vortex Motion ◽  
Superfluid Density ◽  
High Tc Superconductors ◽  
High Tc

We have found the correlation between nanoscopic phase separation in the copper-oxygen planes of YBCO and TlBCCO and the transport and magnetic properties of these materials in the a-b planes such as: the temperature dependence of the critical current density Jc( T ), the temperature dependence of the superfluid density ns( T )∝1/λ2( T ) at low temperatures, the temperature dependence of the normalized logarithmic relaxation rate S(T), and the dependence of the effective energy barrier against vortex motion on the current density Ueff( J ). These properties are controlled by the ratio of the amount of an underdoped filamentary phase to that of an optimally doped one.

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