تجاوز إلى المحتوى الرئيسي

Electrical conductivity and complex impedance analysis of La0.7−xNdxSr0.3Mn0.7Ti0.3O3 (x≤0.30) perovskite

Author name : Amel Abassi
Publication Date : 2016-03-01
Journal Name : Journal of Magnetism and Magnetic Materials

Abstract

properties
of (La0.70−xNdx)Sr0.30Mn0.70Ti0.30O3 perovskites
(0 ≤ x ≤ 0.30) prepared by the usual ceramic procedure
were investigated. Structural Rietveld refinements of
the X-ray powder diffraction revealed that for x = 0 the
compound crystallizes in a rhombohedral (R¯3c) perovskite
structure, while for x = 0.10, 0.20 and 0.30 the structure
becomes orthorhombic (Pbnm). The field-cooled, zerofield-
cooled and M(H) measurements lead to conclude that
the samples with x ≥ 0.10 behave like spin-glass systems.
The temperature dependence of the resistivity exhibits two
transitions at two temperatures Tp1 and Tp2, with the same
width for the two peaks. TP1 results from the competition
between double-exchange and super-exchange mechanisms
inside the grain (intrinsic effects) whereas TP2 arises due
to the grain boundary effects (extrinsic effect). The resistivity
of this system seems to be related to the competition
between antiferromagnetic insulating (AFI) phases, ferromagnetic
insulating (FMI) phases and ferromagnetic metal
(FMM) phases, which is induced by Nd doping effect.

Keywords

Perovskite manganites · A-site substitution · Rietveld analysis · Spin-glass system

Publication Link

https://doi.org/10.1016/j.jmmm.2015.10.115

Block_researches_list_suggestions

Suggestions to read

HIDS-IoMT: A Deep Learning-Based Intelligent Intrusion Detection System for the Internet of Medical Things
Ahlem . Harchy Ep Berguiga
Generalized first approximation Matsumoto metric
AMR SOLIMAN MAHMOUD HASSAN
Structure–Performance Relationship of Novel Azo-Salicylaldehyde Disperse Dyes: Dyeing Optimization and Theoretical Insights
EBTSAM KHALEFAH H ALENEZY
“Synthesis and Characterization of SnO₂/α-Fe₂O₃, In₂O₃/α-Fe₂O₃, and ZnO/α-Fe₂O₃ Thin Films: Photocatalytic and Antibacterial Applications”
Asma Arfaoui
تواصل معنا