Abstract
Positron annihilation lifetime spectroscopy at room temperature is used to investigate polycrystalline Cu-Zn ferrite samples substituted with Nd. Standard ceramic technique is used to prepare all investigated samples. The variation of positron annihilation parameters I1%, I2%, τ1, and τ2 are demonstrated with grain size, initial permeability, homogeneity of the samples, and electrical resistivity with Nd concentration. The important novel points are: (1) Intragranular pores are equal to the sum of intra- and interdomain pores. The lifetime τ1 is increased due to the decrease of the intradomain pores. The initial permeability and homogeneity are decreased with increasing the interdomain pores. The electrical resistivity is increased due to the increase of the interdomain pores.
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