Dual behaviors of magnetic CoxFe1−x (0≤x≤1) nanowires embedded in nanoporous with different diameters

Synthesis and magnetic properties of cobalt-iron/cobalt-ferrite soft/hard magnetic core/shell nanowires

“…For an applied magnetic field perpendicular to the nanowires axis, the magnetic saturation is reached up at higher H values. It is worth noting that for applied H parallel to the Nws axis, the values of reduced remanence A c c e p t e d M a n u s c r i p t magnetization (M R /M S = 0.37) and coercive field values ( 0 H c =104 mT) are in very good agreement with those reported previously [16,18,19,25]. However, such values and the hysteresis loops shape are very different for CoFe 2.7 /CoFe 2 O 4 core/shell nanowires.…”

Electrochemical synthesis of magnetic nanowires with controlled geometry and magnetic anisotropy

“…The magnetic characterization of Fe 100-x Co x nanowires presented by many authors (Menon et al, 2001;Zhan et al, 2002;Qin et al, 2002Qin et al, , 2003Fodor et al, 2003;Ramazani et al, 2011Ramazani et al, , 2012 shows similar trends in the evolution of coercivity and remanence with an applied field with different values for coercivity, remanence, and saturation magnetization. The high aspect ratio of the nanowires results in a strong shape anisotropy, which is considerably larger than magnetocrystalline anisotropy, forcing the easy magnetization axis to lie along the nanowire axis.…”

“…Fe-Co nanowires, however, show high coercivity and squareness, properties that make them good candidates as hard magnetic materials. A number of studies have reported the evolution and correlation of magnetic properties with the microstructure for arrays of nanowires with different composition and geometric characteristics (e.g., nanowire length and diameter; Fodor et al, 2002;Qin et al, 2002Qin et al, , 2003Ramazani et al, 2011Ramazani et al, , 2012. This section deals with the evolution of magnetic properties with the composition and diameter of Co x Fe 100-x nanowires and their correlation with the corresponding crystal symmetry.…”

“…A number of studies have focused on the structural characterization of Fe-Co nanowires (Menon et al, 2001;Qin et al, 2002Qin et al, , 2003Ramazani et al, 2011Ramazani et al, , 2012. They show similar phase transitions with various alloy compositions but few differences in phase boundaries.…”

Magnetic Vortex Domain Wall Observation on Polycrystalline Imperfect Iron−Cobalt Alloy Nanowires Growing on 1050 Aluminum

“…Due to the versatility of PAA, this is one of the most popular fabrication techniques for 1D nanomaterials (e.g., nanotubes, Nws, and nanorods). [23] The use of PAA templates for the fabrication of Fe x Co 100Àx Nws is widely reported as it can achieve diameters from 10 nm [24] up to 300 nm; [25] lengths between 700 nm [26] and 40 μm; [27] and interwire distances from 22 [28] to 430 nm. [29] In most cases, PAA templates are of high-purity aluminum, [24,27,28,[30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46] and although the use of low-purity Al for the fabrication of Nws is attractive due to its reasonable price (a thousand times cheaper than those of high purity), [47,48] very few reports can be found in the literature.…”