Local Ferromagnetism in Microporous Carbon with the Structural Regularity of Zeolite Y

Abstract

Magnetization M(H,T) measurements have been performed on microporous carbon (MC) with a three-dimensional nano-array structure corresponding to that of a zeolite Y supercage. The obtained results unambiguously demonstrate the occurrence of high-temperature ferromagnetism in MC, probably originating from a topological disorder associated with curved graphene sheets. The results provide evidence that the ferromagnetic behavior of MC is governed by isolated clusters in a broad temperature range, and suggest the occurrence of percolative-type transition with the temperature lowering. A comparative analysis of the results obtained on MC and related materials is given.

To be published in Physical Review B (2003)

References in corpus (13)

• Polaron percolation in diluted magnetic semiconductors
• Colossal Effects in Transition Metal Oxides Caused by Intrinsic Inhomogeneities
• Colossal Magnetoresistance is a Griffiths Singularity
• Ferromagnetism in Oriented Graphite Samples
• Unconventional carrier-mediated ferromagnetism above room temperature in ion-implanted (Ga, Mn)P:C
• Ferromagnetism of a graphite nodule from the Canyon Diablo meteorite
• Particle-hole symmetric localization in two dimensions
• Phase Diagram of a Model for Diluted Magnetic Semiconductors Beyond Mean-Field Approximations
• Global versus Local Ferromagnetism in a Model for Diluted Magnetic Semiconductors Studied with Monte Carlo Techniques
• Study of Percolative Transitions with First-Order Characteristics in the Context of CMR Manganites
• Thermomagnetic history effects in SmMn${}_2$Ge${}_2$
• Singular Density of States of Disordered Dirac Fermions in the Chiral Models
• Quantum spin glass transition in the two-dimensional electron gas

Cited by in corpus (5)

• Carbon-doped ZnO: A New Class of Room Temperature Dilute Magnetic Semiconductor
• The role of hydrogen in room-temperature ferromagnetism at graphite surfaces
• Interaction Between Superconducting and Ferromagnetic Order Parameters in Graphite-Sulfur Composites
• Magnetic properties of carbon nanodisk and nanocone powders
• Manifestation of finite temperature size effects in nanogranular magnetic graphite