2010
DOI: 10.1088/0031-8949/81/01/015601
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Effect of Fe3+ substitution on elastic properties of yttrium iron garnet

Abstract: 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+ subs… Show more

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Cited by 20 publications
(17 citation statements)
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“…were found to cause a difference between thermodynamic properties measured by different methods, as well as between the properties of samples with different prehistory [6]. On the other hand, θ I and θ 0 comparing reasonably well with previous results for Y 3 Fe 5 O 12 [21] validate the applicability of present approaches.…”
Section: Methodssupporting
confidence: 84%
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“…were found to cause a difference between thermodynamic properties measured by different methods, as well as between the properties of samples with different prehistory [6]. On the other hand, θ I and θ 0 comparing reasonably well with previous results for Y 3 Fe 5 O 12 [21] validate the applicability of present approaches.…”
Section: Methodssupporting
confidence: 84%
“…Further, this also suggests that the Einstein theory is suitable to estimate the molar heat capacity of materials with high values of θ (θ 300 K). Observed decrease in θ or increase in molar heat capacity with Fe 3+ substitution in the system Y 3−x Fe 5+x O 12 (Table III) may be explained in the light of observed reduction in lattice energy, that suggests a weakening of the strength of inter atomic bonding [3]. This weakening in bonding enhances the lattice vibrations, thus the temperature at which maximum phonon vibrations take place (i.e.…”
Section: Methodsmentioning
confidence: 87%
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