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

Çalışmada La0.7Nd0.1K0.2MnO3 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.

Anahtar Kelimeler:

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

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

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,

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