Effects of magnetic field annealing on magnetic properties in ultrafine crystalline Fe-Cu-Nb-Si-B alloys

Quantifying magnetic anisotropy dispersion: Theoretical and experimental study of the magnetic properties of anisotropic FeCuNbSiB ferromagnetic films

“…In particular, amorphous FeCuNbSiB alloys, the precursor of the so-called Finemet nanocrystalline alloy, present remarkable soft magnetic features, evidenced by low coercive fields, high permeability, and high saturation magnetization [3], making possible its employment in high performance and low energy consumption devices. Experimentally, several results have been obtained for FeCuNbSiB magnetic ribbons, and, consequently, the knowledgement about its magnetic properties and the crystallization process are well-established [1,2,[4][5][6]. However, although some reports found in literature have addressed distinct phenomena and aspects [7][8][9][10][11][12][13][14][15][16], the complete understanding on the magnetic behavior of amorphous FeCuNbSiB ferromagnetic films is still lacking [17].…”

Tuning of Magnetic Properties and Domain Structure in Feco- and Fesi-Based Soft Magnetic Alloys by Thermal Processing Under Magnetic Field

“…Although, most of the research on magnetic annealing has been devoted to the various binary and ternary alloys of Fe, Co, and Ni, the effects of field annealing were found to be present also in the alloy systems with only one kind of magnetic atoms such as silicon steel sheets [6] and more recently developed Fe-Cu-Nb-B-Si [7] and Co-(Zr,Nb)-B-Cu nanocrystalline alloys [8,9]. Here, an important role in development of the field-annealing induced anisotropy seems to be played by metalloid atoms and other mobile minority atoms/defects species.…”

Effect of Ca and Al Additions on the Magnetic Properties of Nanocrytalline Fe-Si-B-Nb-Cu Alloy Powder Cores

“…A large number of studies have been carried out in terms of their fundamentals and applications continuously [6,7], resulting in the commercialization of the nanocrystalline soft magnetic materials with the nominal composition Fe 73.5 Si 13.5 B 9 Nb 3 Cu 1 known as Finemet alloy [8][9][10]. The alloy showed the excellent soft magnetic properties such as high permeability (µ e ), high saturation magnetization (M s ), high Curie temperature (T c ) and very low coercivity (H c ) [11][12][13][14][15], of which microstructure consisted of nanocrystalline α-Fe(Si) embedded in an amorphous matrix [16][17][18][19][20][21][22].…”