Ferromagnetism in oriented graphite samples
نویسندگان
چکیده
منابع مشابه
Defect-induced ferromagnetism in graphite
We demonstrate direct evidence for ferromagnetic order at defect structures in highly oriented pyrolytic graphite with magnetic force microscopy at room temperature. Magnetic impurities have been excluded as the origin of the magnetic signal after careful analysis supporting an intrinsic magnetic behavior of carbon-based materials. The observed ferromagnetism has been attributed to originate fr...
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Ultrasonic force microscopy (UFM) can be used to image the distribution of elastic modulus up to several tens of GPa, which is not possible by the force modulation mode using a soft cantilever of spring constant less than 1 N m‘. It was shown that by careful design of a piezoelectric transducer, together with a sample with small friction force, deflection vibration of the cantilever without tor...
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We have studied the magnetic field dependence of the thermal conductivity κ(T,B) of highly oriented pyrolytic graphite samples at temperatures 0.2K≤ T < 10K and fields 0T≤ B ≤ 9T. The samples show clear deviations from the Wiedemann-Franz law with a kink behavior at fields B ∼ 0.1 T near the metal-insulator transition observed in electrical resistivity measurements. We further show that the osc...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2002
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.66.024429