TEM image of Co-W clusters produced with magnetron sputter power of 50 W, showing the particle sizes below 10 nm.
X ray diffraction pattern for both sputtering powers. The standard diffraction lines for (a) Co3W, (b) fcc Co, and (c) hcp Co are presented as vertical lines.
High-resolution TEM image of individual Co-W cluster. (Inset) Fast Fourier transform of the HRTEM image shows the diffraction spots corresponding to the  zone axis of the hcp structure.
Hysteresis measurements of Co-W clusters obtained at (left) 10 K and (right) 300 K. The inset shows second quadrants.
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