13C nuclear magnetic resonance and electron spin resonance of amorphous hydrogenated carbon

R. Blinc, D. Arčon, P. Cevc, I. Pócsik, M. Koós, Z. Trontelj, Z. Jagličič

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The temperature dependences of the 13C and 1H magnetization recovery and spin-lattice relaxation times as well as the 13C NMR spectra have been studied between 300 K and 4 K. The observed short and nearly temperature independent proton and 13C spin-lattice relaxation times demonstrate that the dominant spin-lattice relaxation mechanism is spin diffusion to paramagnetic impurities. The fact that the magnetization recovery curves clearly deviate from the single-exponential form expected for the case of spin diffusion and randomly distributed paramagnetic centres demonstrates that the paramagnetic centres aggregate in clusters. Superparamagnetic freezing effects expected for such an inhomogeneous distribution are indeed seen below 50 K in the temperature dependence of the electron spin-resonance (ESR) intensity, the 13C NMR spectra and the SQUID magnetization measurements which show a distinct magnetic hysteresis loop.

Original languageEnglish
Pages (from-to)6813-6824
Number of pages12
JournalJournal of Physics Condensed Matter
Volume10
Issue number30
DOIs
Publication statusPublished - Aug 3 1998

Fingerprint

Spin-lattice relaxation
spin-lattice relaxation
Paramagnetic resonance
Magnetization
electron paramagnetic resonance
Carbon
Nuclear magnetic resonance
Relaxation time
magnetization
nuclear magnetic resonance
carbon
relaxation time
recovery
Recovery
Magnetic hysteresis
temperature dependence
SQUIDs
Hysteresis loops
Freezing
Temperature

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

13C nuclear magnetic resonance and electron spin resonance of amorphous hydrogenated carbon. / Blinc, R.; Arčon, D.; Cevc, P.; Pócsik, I.; Koós, M.; Trontelj, Z.; Jagličič, Z.

In: Journal of Physics Condensed Matter, Vol. 10, No. 30, 03.08.1998, p. 6813-6824.

Research output: Contribution to journalArticle

Blinc, R. ; Arčon, D. ; Cevc, P. ; Pócsik, I. ; Koós, M. ; Trontelj, Z. ; Jagličič, Z. / 13C nuclear magnetic resonance and electron spin resonance of amorphous hydrogenated carbon. In: Journal of Physics Condensed Matter. 1998 ; Vol. 10, No. 30. pp. 6813-6824.
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