Study of conduction mechanism in aluminium and magnesium co-substituted lithium ferrite

Pandya, M. P.; Modi, K. B.; Joshi, H. H.

doi:10.1007/s10853-005-4416-z

Cited by 12 publications

(3 citation statements)

References 21 publications

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“…Another important aspect of zero porosity correction is that one can also approximate the magnitude of elastic constants and other parameters for single crystalline material of the same composition [7], which is important from the applications point of view. Thus, it is a fruitful practice for polycrystalline oxide material that certain parameters such as resistivity [8,9] and permeability [10,11], including elastic constants [12][13][14], are corrected for zero porosity.…”

Section: Zero Porosity Correction To Elastic Modulimentioning

confidence: 99%

Effect of Fe³⁺ substitution on elastic properties of yttrium iron garnet

Sharma¹,

Modi²

2010

Phys. Scr.

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The effect of Fe3+ substitution on the elastic properties of yttrium iron garnet (Y3−x Fe5+x O12, x=0.0, 0.1, 0.3 and 0.5) was studied by means of x-ray diffraction, scanning electron microscopy and ultrasonic pulse transmission technique at 300 K. Elastic moduli of the specimens were computed and these are corrected to the void-free state by employing different models. Contrary to expectation, the magnitude of elastic constants is found to decrease with increasing Fe3+ substitution. The lowering of elastic stiffness is mainly due to residual stress-induced spontaneous cracking in the material and its development on increasing grain size with Fe3+ substitution in the system. The variation of elastic moduli and the lower value of lattice energy for polycrystalline specimens as compared to its single crystalline counterpart were explained in the light of various structural and microstructural parameters and the grain boundary misorientation effect.

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Section: Zero Porosity Correction To Elastic Modulimentioning

confidence: 99%

Effect of Fe³⁺ substitution on elastic properties of yttrium iron garnet

Sharma¹,

Modi²

2010

Phys. Scr.

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“…Other important aspect of zero porosity correction is that one can also approximate the magnitude of elastic constants for single crystalline material of the same composition [17], which is important from the applications point of view. Thus, it is a fruitful practice for polycrystalline oxide materials that certain parameters like resistivity [18,19], permeability [20,21] including elastic constants [22][23][24] be corrected for zero porosity.…”

Section: Ultrasonic Study Of Ca-substituted Lamnomentioning

confidence: 99%

Structural and elastic properties of Ca-substituted LaMnO₃at 300 K

Buch¹,

Lalitha²,

Pathak³

et al. 2008

J. Phys. D: Appl. Phys.

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The compositional dependence of structural and elastic properties of Ca2+ substituted manganite perovskite system with a general formula La1−xCaxMnO3 (x = 0.00, 0.25, 0.33, 0.50 and 1.00) have been studied by means of x-ray diffraction, scanning electron microscopy and ultrasonic pulse transmission technique at 300 K. The elastic moduli of the specimens have also been computed and these are corrected to the void free state. The lattice parameters calculated theoretically are in agreement with those determined experimentally. The structural–elastic properties correlations have been studied. The observed enhancement of elastic constants up to x = 0.33 and reduction with a further increase in calcium concentration has been explained in the light of change in the strength of interatomic bonding caused by change in interatomic distances, microstructure and electronic configuration. The applicability of the heterogeneous metal mixture rule for theoretical estimation of elastic constants has been tested.

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“…Spinel ferrites exhibit certain important electrical and magnetic properties, which make them useful in technological and industrial applications (Viswanathan et al 1990). Nowadays, soft ferrites are very important for researchers due to their various potential applications such as microwave and satellite communication, radars, transformer and magnetic recording (Randhawa et al 2004, Pandya et al 2005. The magnetic properties of ferrites depend on the chemical composition, heat treatment and type of additive or substituted ions (Sattar et al 2007, Rezlescu et al 1995.…”

Section: Introductionmentioning

confidence: 99%