Structural and magnetic behavior of nanocrystalline Cr doped Co-Mg ferrite

Facile co-precipitation route for magnesium ferrites nanostructure: Synthesis, influence of pH variation on structural properties

“…Magnesium ferrites are often employed for microdevices fabrication [10][11] as a result of their low dielectric losses and high resistivity. It is a soft ferrimagnetic material in which Mg 2+ ions have a high preference to occupy the octahedral site [12]. In MgFe 2 O 4 the magnetic coupling occurs due to presence of Fe 3+ ions, given that Mg 2+ possesses zero magnetic moment.…”

Frequency Dependence of Dielectric, Conductivity, Impedance and Electrical Modulus Properties of La3+ Substituted in Cobalt- Magnesium Ferrites

“…In previous years, Co-Mg ferrite has been produced with different production methods by substituted metals such as Cr, Cu, Al, Zn, Ni etc. with various stoichiometric ratios and their dielectric and conductivity properties, especially their structural and magnetic properties have been investigated (Ahmad et al, 2014;Patil et al, 2014;Gao et al, 2015;Kaur et al, 2015;Sharma et al, 2015;Mund and Ahuja, 2017;Jadoun et al, 2018;Ramarao et al, 2018;Sun et al, 2018). Also, there are investigations of La-Mg and La-Co mixed ferrites in the literature separately (Yang et al, 2018;Gaba et al, 2018).…”

Structural, mechanical, dielectric properties and magnetic interactions in Dy3+-substituted Co–Cu–Zn nanoferrites

“…Ferrites offer numerous technological applications including telecommunications and electronic engineering, microwave-absorbing devices, transformer cores, magnetic recording media, magnetic resonance imaging, sensors, computer memory chips, ferro-uids, radio frequency coil fabrication, catalysis, photocatalysis, magnetically guided drug delivery, hyperthermia, etc. [1][2][3][4][5][6] Nanodimension spinel ferrites constitute a primary class of nanomaterials having advantageous ferromagnetic properties that have promoted their technological applicability. [7][8][9] Among the ferrimagnetic spinel ferrites, CoFe 2 O 4 with an MgAl 2 O 4 inverse spinel-like crystal structure displays particularly excellent magnetic properties such as excellent saturation magnetization (M s $ 80 emu g À1 ), coercivity (H c $ 3À5 kOe), rst-order magnetocrystalline anisotropy constant (K 1 $ 10 Â 10 6 erg cm À1 ) and Curie temperature (T c $ 870 K).…”

“…The substitution of RE 3+ into ferrites can establish the 4f-3d couplings that govern magnetocrystalline anisotropy and hence improve the magnetic properties of the ferrites. 15,16 Also, RE 3+ oxides have good electrical resistivity of >10 5 U cm at room temperature. 17,18 Among the RE 3+ ions, substitution of Dy 3+ ions have yielded particularly marked improvements in the properties of ferrites.…”