The electronic properties of FeCo, Ni3Mn and Ni3Fe at the order–disorder transition

Effect of Ni and Co impurities on the electronic structure and magnetic properties of BCC iron

“…3, the calculated density of states of pure BCC Fe is shown, the occupancy of both majority and minority d-states of Fe sites can explain its enhanced ferromagnetic moment compared to pure Fe that has partially filled majority-spin d-bands. The calculated local magnetic moment for the Fe atom in the BCC Fe 0:94 Ni 0:06 ''alloy'' is in good agreement with that calculated by means of the KKR coherent potential approximation combined with the localdensity functional method by Kulkova et al [15]. Our results are in good agreement with experimental values [33][34][35], and with theoretical results obtained by differents methods.…”

“…Since several decades, numerous investigations on magnetism in Fe-based ordered and disordered alloys, both theoretically and experimentally, have been made [6][7][8]. The experimental investigations have provided a variety of information about the magnetic properties of these systems, e.g., variation of magnetization with band filling [9], moment distribution in dilute Fe alloys at low as well as at finite temperatures [10], local environments effects on magnetic properties [11], spatial distribution and thermal variation of hyperfine fields [12], concentration dependence of high field susceptibility [13], low-temperature specific heat [14], order-disorder phase transition and magnetic phase stability [15,16], leading eventually to magnetic phase diagrams.…”

“…Input parameters Kohn-Rostoker (KKR) method; Kulkova et al[15] make electronic structure calculations of the ordered ferromagnetic and paramagnetic transition metal alloys FeCo using the full-potential linearized augmented plane wave method; and finally Ghosh et al[28] study the electronic structure and magnetic properties of disordered BCC Co x Fe 1Àx alloys in their ferromagnetic phases using the Augmented Space Recursion technique coupled with the tight-binding linearized muffin tin orbitals method.4.2. Effect of Ni impurities on electronic structure and magnetism of BCC iron hostIn this case, we also added 6% of Ni impurities in the Fe matrix forming the chemical ordered BCC Fe 0:94 Ni 0:06 ''alloy''.…”

B2 long-range order in mechanically alloyed Fe53.3−0.6x Co46.7−0.4x Sn x (2 ≤ x ≤ 26) annealed at moderate temperatures

“…In other words, the precise values of the measurement temperatures of the HMF's between 0 K and RT do not need to be considered to get the estimates given below. At 0 K, the mean magnetic moments hl Fe i are 3.02 and 2.92 l B in disordered A2 FeCo and in ordered B2 FeCo respectively while the moments hl Co i are respectively 1.81 and 1.62 l B [64][65][66]. The previous model yields then hB S (Co)i = -23.6 T and hB S (Fe)i = ?2.5 T. Table 1 compares mean 119 Sn HMF's measured at RT in various Fe x Co y Sn 100-x-y alloys.…”

Morphologies and magnetic properties of FeCo nanoparticles modulated by changing the types of ligands of Co

“…Several synthetic methods have been applied to synthesize magnetic FeCo alloy nanoparticles [18], such as self-assembly techniques [19], sonoelectrochemical [20], co-precipitation [21], modified mechanochemical procedure [22] and high-energy ballmilling [23]. Precipitation from solution is a simple method to prepare magnetic nanoparticles with a rigorous control over their size and shape [24][25][26][27][28][29].…”