Synthesis of ferromagnetic La1−x Sr x MnO3 nanoparticles by precipitation from diethylene glycol solution and their properties

Yulia Shlapa,Volodymyr Trachevskii,Anatolii Belous,Oleksandr Yelenich,Sergii Solopan

doi:10.1007/s40145-016-0190-4

Abstract

La1−x Sr x MnO3 nanoparticles were synthesized by precipitation from diethylene glycol solution. Features of synthesis were studied using 1Н, 13С, 139La nuclear magnetic resonance (NMR) investigations. The obtained results showed that the complexation reaction between diethylene glycol and metal cations takes place during the synthesis. These complexes decomposed at 200 °C and an amorphous precursor (La,Sr)MnO3 was formed. According to X-ray results, the crystallization of the perovskite structure began at 600 °C and finished at 800 °C. Microstructural studies showed that obtained nanoparticles are weakly agglomerated and have small sizes. Based on these nanoparticles, magnetic fluid was prepared which was effectively heated under an alternating magnetic field.

Highlights

At present, ferromagnetic materials find numerous practical applications in different fields of science and engineering and, in medicine [1]
The aim of this study was to investigate the features of synthesis of nanoparticles based on substituted lanthanum–strontium manganites La1 хSrхMnO3 from diethylene glycol solution, and their structure and physical properties
La1 хSrхMnO3 manganites with distorted perovskite structure were synthesized by precipitation from diethylene glycol solution

Summary

Introduction

Ferromagnetic materials find numerous practical applications in different fields of science and engineering and, in medicine [1]. Therapy, and diagnostic (magnetic resonance imaging, MRI) can be possible directions of medical usage of ferromagnetic nanoparticles [2,3]. It is connected with the fact that there is some information about compatibility of several ferromagnetic materials (magnetite—Fe3O4) with biological objects [4]. Application of magnetic nanoparticles in medicine allows improving medical treatment techniques [5]. Magnetite has an essential drawback as it has a high Curie point (585 °C) that causes uncontrolled heating to high temperatures.

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