La0.94Bi0.06Mn1-xAxO3 (A= Cr, x= 0; 0,05; 0,1; 0,2; 0,25) determination of structural, magnetic and magnetocaloric properties of samples

ABSTRACT Master' s Thesis La0.94 Bi0.06 Mn1-x Ax O3 (A= Cr, x= 0; 0,05; 0,1; 0,2; 0,25) DETERMINATION OF STRUCTURAL, MAGNETIC AND MAGNETOCALORIC PROPERTIES OF SAMPLES Uğur ÖZKAN Inonu University Graduate school of Natural and Applied Sciences Department of Physics (xi+69) 2019 The Counselor of the Thesis: Prof. Dr.Tekin İZGİ In this study, the effects of Cr doping on structural, magnetic and magnetocaloric properties of La0.94Bi0.06Mn1-xCrxO3 (x = 0; 0.05; 0.1; 0.15; 0.2; 0.25) samples were investigated. It was observed that all the samples had orthorhombic symmetry, although there was no significant change in the X-ray structure analyzes of all the samples doped with Cr instead of Mn. The decrease in Curie temperature and saturation magnetization with Cr content could be due to reduced ferromagnetic effect in Cr-doped compounds. The decrease in magnetic entropy change could be due to the reduction in saturation magnetization with increasing Cr content. KEY WORDS: Perovskite Manganits, Magnetocalorik Effect, Magnetic Entropy Change