Magnetic study of substituted Mg–Mn ferrites synthesized by citrate precursor method

Chauhan, Brijesh Singh; Kumar, Rajesh; Jadhav, K. M.; Singh, M.

doi:10.1016/j.jmmm.2004.04.133

Cited by 83 publications

(17 citation statements)

References 26 publications

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“…Since the ionic radius of Al 3+ ions is smaller than that of Fe 3+ ions therefore the decreasing trend in theoretical lattice parameter is then justified. Further, the estimated values of theoretical lattice parameter were observed to be in agreement with the experimental values as reported in our previous work [13]. It is also evident from Fig.…”

Section: Research Articlesupporting

confidence: 90%

“…The decreasing trend in θ1, θ2 and θ5 is again suggesting the weakening of the A-B and A-A interactions and increase in θ3 as well as θ4 indicating the strengthening of the B-B interactions. Theoretical estimation of magnetic interactions based on cation distribution clearly predicted the weakening in super-exchange interactions with the incorporation of Al 3+ ions in the Mg-Mn ferrites and is in agreement with the experimental results where the saturation magnetization and Neel temperature was reported to decrease with the incorporation of Al 3+ ions in the Mg-Mn ferrite matrix [13].…”

Section: Research Articlesupporting

confidence: 87%

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Structural analysis and evaluation of magnetic exchange interactions via cation distribution technique in Mg0.9Mn0.1AlxFe2-xO4 ferrites

Kumar¹

2015

Appl. Sci. Lett.

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Mg0.9Mn0.1AlxFe2-xO4 (x = 0.1, 0.3, 0.5) were synthesized by citrate precursor technique and explored for detailed structural analysis. X-ray diffraction technique was used to confirm the phase formation and it revealed the formation of single phase cubic spinel structure. The surface morphology of samples was studied by using scanning electron microscopy. Theoretical lattice parameter and ionic radius of tetrahedral as well as octahedral site was observed to decrease with the incorporation of Al 3+ ions. Theoretical estimation of magnetic exchange interactions based on the cation distribution confirmed the weakening of super-exchange interactions with the incorporation of Al 3+ ions in Mg-Mn ferrite matrix.

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Section: Research Articlesupporting

confidence: 90%

Section: Research Articlesupporting

confidence: 87%

Structural analysis and evaluation of magnetic exchange interactions via cation distribution technique in Mg0.9Mn0.1AlxFe2-xO4 ferrites

Kumar¹

2015

Appl. Sci. Lett.

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“…and the magnetic moment decreases from 1.416 pa to 0.771 PB-The variation of saturation magnetization (Ms) and magnetic moment (PB) with an increase Cu 2+ concentration in Ni ferrite can be explained on basis of Neel's two sub lattice model 25 Ferromagnetic materials, which have tall, narrow hysteresis loops with small loop areas, are referred to as 'soft' ferrites. Good permanenet magnets, on the other hand, should show a high resistance to demagnetization.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Magnetic Properties of Ni‐Cu Nano‐Magnetic Ceramics

Sridhar¹,

Ravinder

Kumar

2014

Ceramic Transactions Series

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Nano-cermics of Nij.x Cux Fe 2 0 4 (0 < X < 1) ferrites were synthesized by citrate -gel auto-combustion technique. The crystal structure was investigated by X-ray diffraction (XRD). The values of lattice parameter and X-ray density have been calculated from XRD data. The octahedral (de) and tetrahedral (d A ) sites were also calculated. Magnetic properties of nanoceramics are investigated by Vibrating Sample Magnetometer (VSM) in the range of 20KO e at room temperature. The Saturation Magnetization (M s ) and Magnetic Moment (ps) were calculated and shows a decrease with increase of Cu substitution in Ni nano-ferrites. INTRODUCTIONMagnetic materials such as Spinel ferrites with chemical formula MFe 2 04 (where M stands for divalent ions of the transition metal elements such as Ni, Cu, Co, Zn, Mg, Fe, Cd and Mn.) have tremendous commercial viability as they have very good magnetic and electrical properties. The chemical composition, preparation methods, sintering temperature, nature of the additives and the choice of cations along with Fe 2+ and Fe 3+ ions and their distribution between tetrahedral (A-site) and octahedral (B-site) sites of the spinel lattice decide the structural and magnetic properties of these Spinel ferrites 1 .There are plenty of applications for Magnetic ferrites such as Ni-ferrite (NiFe 2 0 4 ) in the areas of biomedical, magnetic ferrofluids, microwave absorption, repulsive suspension for levitated railway systems, gas sensing capabilities, etc. ' \ Synthesising ferrite nanocrystals with various metals, such as chromium, copper, manganese, and zinc results the increase of some of their electric or magnetic properties '. Substituting copper in nickel ferrite results in the alteration of properties of nickel ferrite which is used in many device applications and this is considered one important class of spinel ferrites 7 , The nickel-copper ferrite has possible applications in nanoscience and technology. That is reason researchers in the field of electronics are vigorously investigating the design of superstructures comprised of magnetically ordered arrays to enhance the sensitivity in magnetic sensors. Nickel-copper ferrites play considerably significant role among magnetic materials because of their high electrical resistivity, high saturation magnetization and high magnetic permeability

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“…measurement which is 166  C. The Néel temperature, T N , is a function of the magnitude of the exchange energy. Physically, at T N , the thermal agitation is so violent that it reduces the alignment of the magnetic moment along a given axis to zero (Chauhan et al 2004). It follows that a ferrimagnetic material above its T N is paramagnetic.…”

Section: Resultsmentioning

confidence: 99%

Sintering Temperature Dependent Permeability of Nanocrystalline Ni0.20Cu0.30Zn0.50Fe2O4 Ferrite

Rahman

Khan

Mahmud

et al. 2011

J Bangladesh Acad Sci

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The spinel ferrite of Ni 0.20 Cu 0.30 Zn 0.50 Fe 2 O 4 was studied at room temperature using X-ray diffraction pattern prepared by auto combustion technique. The analysis of the XRD patterns showed that the sample has a single phase cubic spinel structure. The bulk density, average grain size and initial permeability increase with increasing sintering temperature up to a optimum temperature. Beyond that temperature all those properties decreases. The value of relative quality factor decreases with increasing sintering temperature. The DC magnetization measurement showed that at room temperature the sample is in ferrimagnetic state. The number of Bohr magneton, n( B ), Néel temperature, T N , and the field at which saturation occurs were also calculated and possible explanation for the observed characteristics of microstructure, initial permeability, DC magnetization, and Néel temperature of the studied sample are presented.

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Magnetic study of substituted Mg–Mn ferrites synthesized by citrate precursor method

Cited by 83 publications

References 26 publications

Structural analysis and evaluation of magnetic exchange interactions via cation distribution technique in Mg0.9Mn0.1AlxFe2-xO4 ferrites

Structural analysis and evaluation of magnetic exchange interactions via cation distribution technique in Mg0.9Mn0.1AlxFe2-xO4 ferrites

Synthesis and Magnetic Properties of Ni‐Cu Nano‐Magnetic Ceramics

Sintering Temperature Dependent Permeability of Nanocrystalline <i>Ni<sub>0.20</sub>Cu<sub>0.30</sub>Zn<sub>0.50</sub>Fe<sub>2</sub>O<sub>4</sub></i> Ferrite

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