Magnetization for lower temperature, selective diamond and carbon nanotube formation: A milestone in carbon physicochemical condensation

Little, Reginald B.; Goddard, R. E.

doi:10.1063/1.1643784

Cited by 22 publications

(20 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[8][9][10] Furthermore, carbon magnetism will attract interest in biophysical and chemical sciences because the spin-dependent part of the electronic wavefunction can affect the chemical bonding path, as has been found in selective growth of diamond using a magnetic field. [11] For all these potential applications,…”

mentioning

confidence: 99%

Tunable Magnetism in Carbon‐Ion‐Implanted Highly Oriented Pyrolytic Graphite

et al. 2008

View full text Add to dashboard Cite

Stable, room‐temperature ferromagnetism in carbon— more precisely, highly oriented pyrolytic graphite — with Curie temperature as high as 460 K is reported. The magnetization can be easily tuned by controlling the low‐energy carbon ion implantation dose used to create the samples. Theory indicates that the ferromagnetic order likely results from itinerant π‐electrons from defects (see figure).

show abstract

mentioning

confidence: 99%

Tunable Magnetism in Carbon‐Ion‐Implanted Highly Oriented Pyrolytic Graphite

et al. 2008

View full text Add to dashboard Cite

show abstract

“…The blue dotted line and magenta dashed curve in Fig. 3e are derived from the spin-wave theory 24 and the Ising model 25 , respectively. The fitting parameters used here are the critical temperature of spin-wave T c sw = 1,160 K, anisotropy ∆ = 0.001, and Curie temperature T c = 680 K. At low temperature (T < 550 K), the magnetization is a linear function of temperature, which can be described by spin-wave theory based on the 2D Heisenberg model.…”

mentioning

confidence: 99%

Room temperature ferromagnetism in Teflon due to carbon dangling bonds

et al. 2012

Nat Commun

View full text Add to dashboard Cite

The ferromagnetism in many carbon nanostructures is attributed to carbon dangling bonds or vacancies. This provides opportunities to develop new functional materials, such as molecular and polymeric ferromagnets and organic spintronic materials, without magnetic elements (for example, 3d and 4f metals). Here we report the observation of room temperature ferromagnetism in Teflon tape (polytetrafluoroethylene) subjected to simple mechanical stretching, cutting or heating. First-principles calculations indicate that the room temperature ferromagnetism originates from carbon dangling bonds and strong ferromagnetic coupling between them. Room temperature ferromagnetism has also been successfully realized in another polymer, polyethylene, through cutting and stretching. our findings suggest that ferromagnetism due to networks of carbon dangling bonds can arise in polymers and carbon-based molecular materials.

show abstract

“…The particular interest among the biophysical and chemical sciences is triggered by the fact that the spin dependent part of the electronic wave function and its symmetry conditions can have a dramatic influence on the occurrence of certain bonding scenarios [5]. For example, a magnetic field induced shift in the bonding probability has been used as an argument for selective diamond formation [6].…”

mentioning

confidence: 99%

π-Electron Ferromagnetism in Metal-Free Carbon Probed by Soft X-Ray Dichroism

et al. 2007

View full text Add to dashboard Cite

Elemental carbon represents a fundamental building block of matter and the possibility of ferromagnetic order in carbon attracted widespread attention. However, the origin of magnetic order in such a light element is only poorly understood and has puzzled researchers. We present a spectromicroscopy study at room temperature of proton irradiated metal free carbon using the elemental and chemical specificity of x-ray magnetic circular dichroism (XMCD). We demonstrate that the magnetic order in the investigated system originates only from the carbon π-electron system.

show abstract

Magnetization for lower temperature, selective diamond and carbon nanotube formation: A milestone in carbon physicochemical condensation

Abstract: Structure and magnetic properties of multi-walled carbon nanotubes modified with iron Low Temp.

Cited by 22 publications

References 52 publications

Tunable Magnetism in Carbon‐Ion‐Implanted Highly Oriented Pyrolytic Graphite

Tunable Magnetism in Carbon‐Ion‐Implanted Highly Oriented Pyrolytic Graphite

Room temperature ferromagnetism in Teflon due to carbon dangling bonds

π-Electron Ferromagnetism in Metal-Free Carbon Probed by Soft X-Ray Dichroism

Contact Info

Product

Resources

About