Thin films of organic-based magnetic materials of vanadium and cobalt tetracyanoethylene by molecular layer deposition
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- Thin films of organic-based magnetic materials of vanadium and cobalt tetracyanoethylene by molecular layer deposition
- Kao, Chi-Yueh; Li, Bin; Lu, Yu; Yoo, Jung-Woo; Epstein, Arthur J.
- ROOM-TEMPERATURE MAGNETS; CHEMICAL-VAPOR-DEPOSITION; SOLID-SOLUTION; P-PHENYLENEDIAMINE; GROWTH; CVD; CO
- Issue Date
- ROYAL SOC CHEMISTRY
- JOURNAL OF MATERIALS CHEMISTRY C, v.2, no.30, pp.6171 - 6176
- Thin films of Co[TCNE]x and CoxVy[TCNE] z were grown by molecular layer deposition (MLD). Metallic cobalt (Co0) was observed in the Co[TCNE]x film which contributes to the magnetism showing a coercivity of 450 Oe at 5 K with magnetic ordering temperature above 300 K. A thin film of CoxVy[TCNE] z showed magnetic ordering temperature up to 300 K with a coercivity of 50 Oe at 5 K and 30 Oe at 300 K. The film growth was monitored using a quartz crystal microbalance (QCM), and chemical compositions were characterized by X-ray photoelectron microscopy (XPS). Compared to materials previously synthesized from solution and chemical vapor deposition (CVD) methods, thin films made in this work are smooth and pinhole-free that can be beneficial for the development of thin film devices. The chemical composition of MLD-made films and the presence of Co islands are also shown here.
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