a study of some properties for substituted li-ferrite using positron annihilation lifetime technique
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ID: 183239
2015
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Abstract
Positron annihilation lifetime spectroscopy (PALS) is used to investigate polycrystalline substituted Li-ferrite samples. The dray ceramic technique was used to prepare all investigated samples. The variation of positron annihilation parameters I1%, I2%, τ1, and τ2 has been demonstrated with porosity and the initial permeability against the ionic radii of substituted ions for Li ferrite. The grain size (G.S.) increased with increasing the ionic radii of the substituted ions for Li-ferrite. The correlation between I2 and τ2 has opposite behavior with the ionic radii of the substituted ions. Whereas the correlation between I1 and τ1; has nearly the same behavior with the ionic radii of the substituted ions except for V and Gd samples. There is mostly a direct correlation between the electrical resistivity and I2 values except for Sm sample with increasing the ionic radii of substituted ions.
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aly2015resultsa
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| Authors | ;E. Hassan Aly;A.M. Samy |
| Journal | international journal of aerospace engineering |
| Year | 2015 |
| DOI |
10.1016/j.rinp.2015.03.001
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