Mössbauer and Electrical Studies of Mn x Co1−x Fe2O4 Compounds Prepared via Glycothermal Route

The effect of temperature on the structure and magnetic properties of Co0.5Ni0.5Fe2O4 spinel nanoferrite

“…[9,10]. The recovered compound was dried under a 250 W infrared lamp for at least 12 h, homogenized and divided into several specimens, which were subsequently sintered under continuous flow of high-purity argon gas (99.999%) for 6 h at different temperatures (300, 400, 500, 600, 700, 800 and 900°C).…”

“…The nanoparticle ferrites can be synthesized by different methods such as ceramic [4], microemulsion [5,6], hydrothermal [7] and sol-gel [8]. In addition, there is the Glycol-thermal method which can be used to synthesize highly homogeneous and single-phase nanoferrite powders at a relatively low temperature at 200°C [9,10].…”

Preparation of Magnetic Cu0.5Mg0.5Fe2O4 Nanoparticles and Kinetics of Thermal Process of Precursor

“…Second, the magnetocrystalline anisotropy of the particles is dependent on the crystallinity of Cu 0.5 Mg 0.5 Fe 2 O 4 . The higher calcination temperature, the larger is crystallinity of particles, which reduces magnetocrystalline anisotropy distortion, and increases magnetic moment within the particles of Cu 0.5 Mg 0.5 Fe 2 O 4 [3,11]. Compared with magnetic properties of CuFe 2 O 4 (600°C, 33.5 emu g −1 ) [ When precursor is calcined above 600°C, specific saturation magnetization decreases with increasing calcination temperature, which is attributed that Cu 0.5 Mg 0.5 Fe 2 O 4 is decomposed into CuO, MgO, and Fe 2 O 3 particles with weak magnetic intensity above 600°C.…”

“…; M 3+ = Fe 3+ ) have many unique properties, such as high electrical resistivity, high permeability, high Curie temperature, mechanical hardness, large magnetocrystalline anisotropy, high coercivity, chemical stability, and temperate specific saturation magnetization. Therefore, spinel ferrites have been extensively used in many fields, such as high-density information storage, catalysts, ferrofluids, drug targeting, magnetic separation, magnetic resonance imaging, and gas sensor [1][2][3][4][5][6][7][8][9][10][11]. Spinel ferrites have a cubic close-packed structure.…”

Mössbauer and magnetic studies of Mn0.1Sr0.2Co0.7Fe2O4 nanoferrite

“…Efforts continue to find the best substitutions to improve the properties. We have been interested in the study of Co, Mn and Mg ions in ferrites [2,3]. In the present work, we extend these studies to include substitution by larger Sr ions.…”