A study of some properties for Li-Mn nanoparticles ferrite using positron annihilation lifetime technique

被引：1

作者：

Aly, E. Hassan ^{[1
]}

Samy, A. M. ^{[1
]}

机构：

[1] Ain Shams Univ, Fac Sci, Dept Phys, Cairo 11566, Egypt

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 647卷

关键词：

Nano Li-Mn ferrite; Positron annihilation; Grain size; Electric resistivity; ELECTRICAL-PROPERTIES; MAGNETIC-PROPERTIES; ZN FERRITE; PRECURSOR METHOD; SUBSTITUTION;

D O I：

10.1016/j.jallcom.2015.06.052

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Nanoparticle samples of the composition Li(0.5-0.5x) MnxFe(2.5-0.5x)O4, (x = 0, 0.25, 0.5 and 0.75) are prepared with a sol-gel auto combustion method. The nano grain size is decreased with increasing the manganese content. The analysis of PAL spectra indicated the existence of cluster defects. There are different correlations between the lifetime parameters with the manganese content. The relative intensity I-2 and the trapping rate. are increased for samples with x = 0.25 & 0.75, and are decreased for the sample with x = 0.5 relative to the pure nano Li-ferrite. The electrical resistivity takes the same behavior as the G.S. by increasing Mn content. The size of the domain walls is decreased with Mn content for mono-grain Li ferrite samples. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：427 / 430

页数：4

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