Ferromagnetism and metal-insulator transition in F-doped LaMnO3

被引：3
|
作者：
Yadav E. [1 ]
Ghising P. [1 ]
Rajeev K.P. [1 ]
Hossain Z. [1 ,2 ]
机构：
[1] Department of Physics, Indian Institute of Technology, Kanpur
[2] Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, Wrocław
来源：
Physical Review B | 2023年 / 107卷 / 21期
关键词：
Double exchange - Ferromagnetic behaviour - Fluorine-doped - High Curie temperature - Magnetic and electrical properties - Metal-insulators transitions - Metallic behaviors - Mixed valence - Mn ions - Polycrystalline samples;
D O I：
10.1103/PhysRevB.107.214446
中图分类号：
学科分类号：
摘要：
We present our studies on polycrystalline samples of fluorine doped LaMnO3 (LaMnO3-yFy). LaMnO3-yFy exhibits remarkable magnetic and electrical properties. It shows ferromagnetic and metallic behavior with a high Curie temperature of ≈239 K and a high magnetoresistance of -64%. This drastic change in magnetic properties in comparison to pure LaMnO3 is ascribed to the presence of mixed-valence Mn ions driven by the F-doping at the O-sites, which enables double exchange in LaMnO3-yFy. Furthermore, the resistivity data exhibits two peaks at 239 and 213 K, respectively. Our results point towards the possibility of multiple double exchange hopping paths of two distinct resistances existing simultaneously in the sample below 213 K. © 2023 American Physical Society.
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