MAGNETIZATION, MAGNETIC SUSCEPTIBILITY AND HYSTERESIS OF CoGaxFe2-xO4 (x=1.1;1.3) CRYSTALS
А.М. Abdullayev, А.I. Ahmadov, М.C. Nacafzade, I.N. Ibrahimov, M.K. Xudayarova
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ABSTRACT

Analysis of the temperature dependence of molar magnetic susceptibility showed that CoGaxFe2-xO4 (x=1.1;1.3) are ferrimagnets with Curie temperatures (TC) corresponding to (TC≈210K for x=1.11, and TC≈143K for x=1.3). The relationship between the saturation magnetization Ms and the number of Bohr magnetons nB for the CoGaxFe2-xO4 (x=1.1;1.3) molecule at a temperature of 10 K is given by: nB=Ms/(NA μB), where NA– Avogadro's constant, μB – Bohr magneton. Then we obtain the following values for the effective magnetic moment: for CoGa1.3Fe0.7O4 μeff=nB μB≈3.4μB, and for CoGa1.1Fe0.9O4 𝜇eff. = 𝑛B𝜇B ≈ 2.95𝜇B. A hysteresis loop has been discovered in the field dependence of the molar magnetization M(H) of CoGaxFe2-xO4 (x=1.1;1.3) materials at a temperature of T=10K. The parameters and shape of the magnetic hysteresis loop are characteristic of ferrites. The given samples have the following magnetic properties: for CoGa1.3Fe0.7O4, Ms=1.9∙104 emu/mol; Mr=1.28∙104 emu/mol; Hc=2500Oe, and for CoGa1.1Fe0.9O4, 𝑀𝑠 =1.65 ∙ 104 emu/mol; 𝑀r = 1.05 ∙ 104 emu/mol; 𝐻𝑐 = 2700Oe.

Keywords: Magnetization; CoGaxFe2-xO4; Coercivity; Curie temperature.
DOI:10.70784/azip.2.2025203

Received: 07.04.2025
Internet publishing: 28.04.2025    AJP Fizika A 2025 02 az p.03-06

AUTHORS & AFFILIATIONS

Institute of Physics Ministry of Science and Education Republic of Azerbaijan, 131 H.Javid ave. Baku, AZ 1073
E-mail: aqaadil@gmail.com

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