Investigation of Structural and Magnetic Fluid Hyperthermia Properties of La0,7Nd0,1K0,2MnO3 Perovskite Manganite Composition

Year 2018, , 1335 - 1343, 01.08.2018

Cumhur Gökhan Ünlü

https://doi.org/10.29130/dubited.411328

Cited By: 1

Abstract

In this study, La0.7Nd0.1K0.2MnO3 nanoparticles were synthesized by sol-gel method and the structural, magnetic and magneto-thermal properties of the compound were investigated in detail. XRD and SEM analyzes have been performed to determine the structural properties. Rietveld analysis has been performed on the obtained XRD pattern using the FullProf program. At the analysis, it has been observed that the crystal symetry of the compound has had a rhombohedral structure and has had La2O3 and MnO2 impurities in the structure. SEM analysis has revealed that nanoparticles has had spherical and cubic shapes in two different forms. As a result of the magnetic analysis, it has been determined that the compound has been in a ferromagnetic partially paramagnetic state at the room temperature and the saturation magnetization of the existing ferromagnetic phase has been 0.23 Am2/ kg and the coercivity value has been 0.005 T. As a result of the magneto-thermal measurements, the SAR value of the compound has been calculated to be 9.6 W/g.

Keywords

Perovskite manganit, Magnetic fluid hyperthermia, Sol-gel, SEM

La0,7Nd0,1K0,2MnO3 Perovskit Manganit Bileşiğinin Yapısal ve Manyetik Akışkan Hipertermi Özelliğinin Araştırılması

Abstract

Çalışmada La_0.7Nd_0.1K_0.2MnO₃
nanoparçacıklar sol-gel yöntemiyle sentezlendi ve bileşiğin yapısal, manyetik
ve manyeto-termal özellikleri detaylı bir biçimde incelendi. Yapısal
özelliklerin belirlenmesi için XRD ve SEM analizi yapıldı. Elde edilen XRD
desenine FullProf programı kullanılarak Rietveld analizi yapıldı. Analiz sonucunda
bileşiğin kristal örgüsünün Rhombohedral yapıda olduğu ve içesinde ayrıca La₂O₃
ve MnO₂ safsızlıkların bulunduğu gözlendi. SEM analiziyle
nanoparçacıkların iki farklı şekilde, küresel ve kübik şekillenime sahip olduğu
belirlendi. Manyetik analizlerin sonucunda bileşiğin oda sıcaklığında
ferromanyetik- kısmen paramanyetik duruma geçtiği ve var olan ferromanyetik
faza ait doyum mıknatıslanması 0.23 Am²/kg ve bileşiğin koarsivite
değeri 0.005 T olarak belirlendi. Manyeto-termal ölçümler sonucunda bileşiğin
SAR değeri 9.6 W/g olarak hesaplandı.

Keywords

Perovskit manganit, manyetik akışkan hipertermi, sol-gel, SEM

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