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• W3116673973 abstract "This book contains some of the magnetic, the electric and the dielectricproperties of the mixed Cu-Zn spinel ferrite. The material covered in this bookis divided into two parts: They are theoretical part I and experimental part II.Part I contains six chapters, that cover description of magnetic materialsin chapter 1, structure properties of ferrimagnetic materials in chapter 2,magnetic properties of ferrimagnetic materials in chapter 3 , electric anddielectric properties of ferrimagnetic materials in chapter 4, applications offerrimagnetic materials in chapter 5 and finally literature survey in chapter 6.Part II divides into four chapters that describe method, techniques, andresults. These chapters, also, discuss the structure of the mixed Cu-Zn spinelferrite and the effects of the 2 Zn ions of the mixed Cu-Zn spinel ferrite onmagnetic, the electric and the dielectric properties.Chapter 7 covers of the preparation of mixed Cu-Zn spinel ferrite, whichhave the chemical formula 1 s s 2 4 Cu Zn Fe O  , where s stepped by 0.2 according toAdvanced Ferrite Technology Prefaceix( 0.0  s 1.0), were prepared from purity metal oxides using the standardceramic. It, also, exhibits the experimental techniques and the apparatus fordifferent measurements.Chapter 8 illustrates the infrared IR spectra for the ferrite samples in thefrequency range 1 (200 1000)   cm . Two main absorption bands were observedwhich indicate the formation of spinel ferrite compound. In addition, two smallabsorption bands were, also, observed. Their positions and intensities werefound to be strongly depending on the s-value. On the basis of the IR spectraanalyzation, the crystal structure and cations distribution were deduced forthe ferrite samples.Chapter 9 covers the magnetic properties for the ferrite samples usingFaraday’s law of the electromagnetic induction. The ferrite samples wereused to find the magnetization at room temperature in the range of theapplied magnetic field which was varied from 0 1 .  Am up to 510 1 .  Am . Theobtained results illustrate that, as the 2 Zn ions increased the magnetizationincreasing for the ferrite samples with s  0.6 , where it decreased for theferrite samples with s > 0.6. The observed results of the magnetic propertieswere in good agreement with several studies for various ferrite compounds[1-3]. We adapted Yafet and Kittel model [4] and Neel’s theory [5] to explainthe observed results. The initial permeability for the ferrite samples wasdetermined as a function of temperature. It increased with increasing oftemperature, then, it decreased abruptly close to Curie temperature point.Utilizing the initial permeability data, the Curie temperature points wereestimated for all the ferrite samples. It decreased by the addition of the 2 ZnAdvanced Ferrite Technology Prefacexions. The magnetic properties were found to be affected by the intensity ofthe applied magnetic field, the s-value and temperature.Finally, chapter 10 exhibits the AC conductivity for the ferrite samples inthe applied frequency of the range(10 10 )Hz 4 6  . In this range frequency, theAC conductivity increased continuously with increasing of the appliedfrequency. The dielectric properties for the ferrite samples were determined atroom temperature as a function of the applied frequency in therange(10 10 )Hz 4 6  . The general trend for all samples was found to decreasecontinuously with increasing of the applied frequency. The DC resistivity wasdetermined for the ferrite samples in temperature range which varied from300K up to 730K. The variation of the logarithm of resistivity DC ln  with thereciprocal of temperature (1/T) showed that, resistivity continuouslydecreased with increasing of temperature. On the other hand, the plot ofDC ln  versus (1/T) indicated more than one slope. This change of the slope isattributed to the existence of different competing conduction mechanisms.The measurements of the electric and the dielectric properties exhibitedthat, the behavior of the ferrite samples is the same as that of thesemiconductor materials. The results of the electric and dielectric propertieswere in good agreement with previous studies for various ferrite compounds[6-10]. The electron hopping model [11] was used to explain the electricconductivity for the ferrite samples. The electric and the dielectric propertieswere found to be affected by the s-value, temperature and frequency of theapplied magnetic field.Advanced Ferrite Technology PrefacexiThis book exhibited that, the non-magnetic 2 Zn ions have great effectson the magnetic, the electric and the dielectric properties of the Cu spinelferrite.In the light of the different theories and results of chapters in the part Iand II the prominent properties of ferrites make them very promising acandidate versatile. A study of polycrystalline ferrites is important in view oftheir successively extensively used as core materials over a wide range offrequency for numerous electronic devices and electrical components. This isdue to their high initial permeability, large resistivity, high dielectric constantand low dielectric loss. In fact, the mixed Cu-Zn spinel ferrite is considered asoft ferrite material, which is proved to be an interest material fortechnological and scientific applications." @default.
• W3116673973 created "2021-01-05" @default.
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• W3116673973 date "2011-09-16" @default.
• W3116673973 modified "2023-09-27" @default.
• W3116673973 title "Advanced Ferrite Technology: Properties and Applications" @default.
• W3116673973 hasPublicationYear "2011" @default.
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