Study of the physical and magnetic properties of Li0.3Zn0.4−xCaxFe2.3O4 ferrite

Sattar, A. A.; Agami, W. R.

doi:10.1016/j.jallcom.2010.02.008

Cited by 18 publications

(8 citation statements)

References 21 publications

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“…Their low cost, square hysteresis loop, superior high-temperature performance due to the high Curie temperature are the other prominent properties that make them such promising candidates for microwave devices [6][7][8], for example; isolators, circulators, gyrators and phase shifters [3,6,7]. Several investigations on the transition metal substituted lithium ferrite have been carried out to improve the properties of lithium ferrite [1,3,[6][7][8][9][10][11][12][13][14]. However, no reports have been found in the literature regarding structural and magnetic properties of Co-Ni-Li mixed ferrite.…”

Section: Introductionmentioning

confidence: 99%

Structure and magnetic properties of Co–Ni–Li ferrites synthesized by citrate precursor method

Assar

Abosheiasha

2012

Journal of Magnetism and Magnetic Materials

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Section: Introductionmentioning

confidence: 99%

Structure and magnetic properties of Co–Ni–Li ferrites synthesized by citrate precursor method

Assar

Abosheiasha

2012

Journal of Magnetism and Magnetic Materials

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“…This is considered as a new novel point for nano grain mono domain Li-Mn ferrite samples. From another point of view, a reverse behavior is reported for the bulk multi -domain ferrite [25,26], in general. Meanwhile, the increase in the porosity plays a dominant role for the increase of the electrical resistivity for bulk ferrites as well as the increase in lattice parameters or the decrease of the grain size [27][28].…”

Section: Resultsmentioning

confidence: 94%

“…On the basis of the two-state trapping model [15], the shorter-lived component τ 1 and I 1 belonged to positrons annihilating in the matrix and dislocation loops , τ 2 and I 2 characterizing the annihilation of positrons trapped in vacancy clusters and three-dimensional mono vacancies defects. 25, it is reported that the total porosity for ferrite is the sum of inter and intra granular pores [16][17]. Accordingly, the decrease in I 2 for the sample with x = 0.5 relative to that with x = 0.25 attributed to the decrease of the intergranular pores.…”

Section: Experimental Techniquesmentioning

confidence: 99%

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A study of some properties for Li–Mn nanoparticles ferrite using positron annihilation lifetime technique

Aly

Samy

2015

Journal of Alloys and Compounds

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“…Ferrite nanoparticles show unusual magnetic properties such as single domain behavior and superparamagnetism which are not observed in bulk material [12,13]. Also, the resistivity of the ferrites at room temperature can vary from 10 -2 to 10 11 ohm-cm [14][15][16]. The change in the resistivity is brought about by substitution of some appropriate metal ion in the metal site.…”

Section: Introductionmentioning

confidence: 99%

Effect of Zn dopant on Properties of Li ferrite Synthesized by Solution Combustion Method

Anu¹

2017

International Advanced Research Journal in Science, Engineering

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Herein, Urea assisted solution combustion method has been used for the preparation of stoichiometrically pure and Zn doped Li ferrites. Urea acts as a capping agent and helps in the formation of nanostructures. Solution combustion method helps easier formation of ferrites in a single step, at relatively lower temperature and in shorter time than the reported methods. Powder X-ray diffraction (XRD) studies with diffractometer indicate high purity, single phase spinel ferrites formation. Magnetic studies by vibratory sample magnetometer (VSM) reveal an increase in the magnitude of saturation magnetization with increasing Zn content up to x = 0.3. The Zn doped Li ferrite formed possess high dc-resistivity values which make them suitable for high-frequency applications. Apart from the academic interest involved, these investigations are of technological importance in the view of the fact that their end products (ferrites) play a key role as electro-magnetic materials in the modern industry.Keywords: Solution combustion method, powder X-ray diffraction, Powder X-ray diffraction, saturation magnetization, dc-resistivity. I INTRODUCTIONAlkali metal ferrites find extensive use in microwave components due to their attractive electrical and magnetic properties [1][2][3][4][5][6][7][8][9][10][11]. Ferrites have been reported as better electromagnetic materials than pure metals because of their low cost, high resistivity and ease of preparation. The properties of the ferrite materials, which decide the application areas, are generally governed by the chemical compositions along with the procedures followed for their preparation. Therefore, the molecular engineering of ferrite composition and employment of appropriate process parameters play a significant role in tailoring the material properties for a specific need. The properties of the ferrites can be modified by substituting the optimum amount of metal ions as dopant in the basic compositional formulae. It is, therefore, desirable to investigate and understand the dependence of composition on magnetic/electric behavior of these ferrites. Ferrite nanoparticles show unusual magnetic properties such as single domain behavior and superparamagnetism which are not observed in bulk material [12,13]. Also, the resistivity of the ferrites at room temperature can vary from 10 -2 to 10 11 ohm-cm [14][15][16]. The change in the resistivity is brought about by substitution of some appropriate metal ion in the metal site. To obtained sample with high resistivity, it is necessary to ensure that there are no ferrous ions in the stoichiometric ferrite. Therefore, chemical aspect has become the most important factor in the design and preparation of ferrite materials. Solution combustion method has been found to be the most suitable technique for the synthesis of a particular mixed ferrite composition. The properties of the final product (particle size, surface area and porosity) depend on the way the combustion is conducted. The departure of gases favours the desegregation of th...

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Study of the physical and magnetic properties of Li0.3Zn0.4−xCaxFe2.3O4 ferrite

Cited by 18 publications

References 21 publications

Structure and magnetic properties of Co–Ni–Li ferrites synthesized by citrate precursor method

Structure and magnetic properties of Co–Ni–Li ferrites synthesized by citrate precursor method

A study of some properties for Li–Mn nanoparticles ferrite using positron annihilation lifetime technique

Effect of Zn dopant on Properties of Li ferrite Synthesized by Solution Combustion Method

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