Correlation between structural change and electrical transport properties of Fe-doped chrysotile nanotubes under high pressure

Junkai Zhang, Lili Yang, Xiaoxin Wu, Maobin Wei, Yanqing Liu, Chunxiao Gao, Jinghai Yang, Yanzhang Ma

Research output: Contribution to journalArticle

Abstract

Fe3+ doped chrysotile nanotubes (NTs) have been synthesized under controlled hydrothermal conditions, and have been characteristic of layered-walls and roomerature ferromagnetism. High-pressure in situ impedance spectra and synchrotron XRD measurements are performed on Fe-doped chrysotile NTs to reveal the electrical transport and structural properties under compression. Sample resistance (R sum) was found to increase with the pressure elevation, accompanying the step decrease in the grain boundary relaxation frequency (f gb), which reflects the bandgap broadening and dipoles polarization weakening due to the application of pressure. Furthermore, it is found that both R sum and f gb change their pressure dependences at ∼5.0 GPa, which is attributed to the nonlinear compressibility of c-axis and even the underlying lattice distortion of monoclinic structure obtained in the XRD observations.

Original languageEnglish
Article number144008
JournalJournal of Physics Condensed Matter
Volume30
Issue number14
DOIs
StatePublished - Mar 15 2018

Keywords

  • High pressure
  • chrysotile
  • impedance spectrum
  • nanotubes

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