Structural and magnetization crossover in electrodeposited FeAl₂O₄– effect ofin situoxidation

Abstract

Amongst other spinels, iron aluminium oxide (FeAl2O4) exhibits exceptional chemical and physical properties.

Comprehensive Law‐of‐Approach‐to‐Saturation for the Determination of Magnetic Anisotropy in Soft Magnetic Materials

“…[ 13 ] The law‐of‐approach‐to‐saturation (LAS) has been widely subjected to find the magnetic anisotropy of uniaxial and cubic materials from the hysteresis loop using much simpler bulk magnetic characterization techniques. [ 14–22 ]…”

“…[13] The law-of-approach-to-saturation (LAS) has been widely subjected to find the magnetic anisotropy of uniaxial and cubic materials from the hysteresis loop using much simpler bulk magnetic characterization techniques. [14][15][16][17][18][19][20][21][22] Akulov [23] first formulated the approach to saturation for noninteracting polycrystalline ferromagnets by fitting the magnetization data with respect to the applied field H, in the high field regions to 1/H 2 . The magnetization is assumed to be governed by the process of rotation of the magnetization vector near saturation, influenced only by the torques of magnetocrystalline anisotropy.…”

Study of Urbach energy and Kramers–Kronig on Mn and Zn doped NiFe2O4 ferrite nanopowder for the determination of structural and optical characteristics

“…The hopping length is the parameter that gives information about the distance between magnetic ions and the strength of the spin interaction of ions that is defined as the following equations 31 : where L A is the hopping length at the A site (the shortest interval between the A site and the oxygen atom), and L B is the hopping length at the B site (the shortest interval between the B site and the oxygen atom) 32 . As can be seen in Table 2 , L A and L B increased in MNFO and ZNFO compared to NFO.…”

“…The Scherrer method was generally used to calculate crystal size for the most intense peak, which is depicted as follows 32 : …”

“…In the fcc structure of spinel ferrite, the stacking sequence is the form of ABCABCABC layers. When any kind of perturbation happens in this sequence, the stacking fault appears and can shift the peaks position of nanoparticles compared to order reference spectra peaks 32 . This coefficient (SF) is determined by the following equation: where θ is the Bragg’s angle, which here, the Bragg’s angle of the strongest peak (311) regarded to calculating SF coefficient, and is the difference in reference and observed 2θ values 40 .…”