Abstract
A surface modification of diamond with manganese powder was attempted to make a magnetic functional surface for handling diamond. Manganese carbide, Mn7C3, was formed on diamond (110) by near-infrared radiation heating, resulting in a layered material with suppressing formation of Mn5C2. Investigated by a Hall-effect sensor, the magnetic flux density on the modified diamond surface showed ferromagnetic properties.
Highlights
Open AccessDiamond has excellent properties of hardness, compressive strength, electric insulation, and chemical stability [1]
We previously reported that manganese powder reacts with carbon atoms on diamond, forming manganese carbides and manganese oxides
The hexagons with metallic luster were observed. This reveals that the manganese powder directly contacted with diamond was different from the one contacted with the gold film
Summary
Open AccessDiamond has excellent properties of hardness, compressive strength, electric insulation, and chemical stability [1]. Fine-grain diamond has been used as an abrasive powder for materials, they were not placed into particular areas to serve as blades. If diamond surface could be modified to have magnetic properties, we could evaluate the potential for the surface serve as a magnetic sensor and the damage of diamond. We previously reported that manganese powder reacts with carbon atoms on diamond, forming manganese carbides and manganese oxides. The reaction only modified diamond (110) plane, providing ferrimagnetism at room temperature and the formation of layered manganese carbides [3]. Karen et al [4] characterized the magnetic properties of Mn5C2 and Mn7C3 bulk manganese carbides as paramagnetic.
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