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(a) X-ray diffraction patterns for nanoclusters of Co and Co(Zr) having 6.3 at. % of Zr. The standard positions and relative intensities of XRD peaks corresponding to the hcp and fcc structures of Co are given as vertical-solid and -dotted lines, respectively (b) High-resolution TEM image of Co(Zr) nanoclusters and (c) the corresponding fast Fourier transform along  zonal axis revealing hcp structure.
Easy-axis alignment of Co(Zr) nanoclusters: (a) Schematic illustration of the alignment method using a set of permanent magnets (N-S), prior to deposition on substrate. 10 (b) Three dimensional view of the substrate is also given—in order to show the direction of the applied magnetic field (x-axis) with respect to the substrate plane. The expanded room-temperature M-H curves of the aligned nanoclusters measured along the easy (x-axis) and hard (y-axis) directions: (c) Co and (d) Co(Zr) having 6.3 at. % of Zr.
(a) Hc and (b) Mr /Ms at 300 K of Co(Zr) nanoclusters as a function Zr contents measured along easy (x) and hard (z) axes. (c) Schematic of a uniaxial nanocluster, where Hal is the magnetic field used for alignment and γ is the angle between the easy axis and Hal . (d) The probability distribution P(γ) of easy axes for Co and Co(Zr) nanoclusters having 7.8 at. % of Zr.
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