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(a) Hydrogenation process to Pt coated ZCO on sapphire substrate. (b) Hydrogen profile using SIMS depth profile for ZCO and Pt/ZCO before and after hydrogen treatment using HIP.
The M-H curves obtained from SQUID for ZCO and Pt coated ZCO before and after hydrogen treatment using HIP (a) at 10 K and (b) at room temperature.
The M vs T curves under field cooling and zero field cooling of (a) as-grown, (b) after hydrogen treatment, and (c) after dehydrogenation process of Pt/ZCO:H. The M-H curves obtained from SQUID for (d) as-grown, (e) after hydrogen treatment, and (f) after dehydrogenation process at 10 K.
XPS depth profile of Pt 4f of Pt/ZCO (a) before and (b) after hydrogenation by HIP treatment.
Spin densities of model geometries. (a) Nearest neighbor Co dimers in the form of Co-H-Co. (b) Two Co atoms on the next nearest neighbor sites. Red and blue ballons represent majority and minority spin densities. The atoms in hexagon centers are interstitial hydrogen atoms. Arrows in (a) and (b) indicates the positions of the Co atoms.
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