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Chemical Vapor Deposition of an Organic Magnet, Vanadium Tetracyanoethylene

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Jeongmin Hong¹, Elena Bekyarova, Walt A de Heer

¹Electrical Engineering and Computer Sciences, University of California , Berkeley, California 94720, United States.

|October 26, 2013

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Nitrophenyl functionalized graphene exhibits room-temperature ferromagnetism, paving the way for novel 2D organic magnets. This breakthrough enables advanced spintronic devices with controllable magnetic properties.

Area of Science:

Materials Science
Condensed Matter Physics
Nanotechnology

Background:

Carbon-based nanomaterials offer potential for next-generation electronic devices.
Controllable magnetic properties are crucial for realizing the full potential of carbon nanosystems.

Purpose of the Study:

To investigate the magnetic properties of nitrophenyl functionalized graphene.
To explore the potential of functionalized graphene as a room-temperature 2D magnet.

Main Methods:

Low-temperature magnetotransport measurements
Vibrating Sample Magnetometry (VSM)
Superconducting Quantum Interference (SQUID) measurements
Scanning Probe Microscopy (SPM)
Magneto-Optical Kerr Effect (MOKE) measurements

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Main Results:

Nitrophenyl functionalization induces room-temperature ferromagnetism and antiferromagnetism in graphene, persisting above 400 K.
Magnetic properties are tunable by NP-functionalization orientation and coverage.
Pronounced MOKE and formation of chemically isolated graphene nanoribbons (CINs) observed.

Conclusions:

Nitrophenyl functionalized graphene acts as a stable 2D organic magnet at room temperature.
This work demonstrates a pathway for developing graphene-based spintronic and magnetoelectronic devices.
Potential applications include current-induced magnetization switching and magnetoelectricity.