Ultraslow diffusion in polycrystalllne h-LITIS2 studied by 7Li spln-alignment echo NMR spectroscopy

Martin Wilkening*, Paul Heitjans

*Korrespondierende/r Autor/in für diese Arbeit

Publikation: Beitrag in einer FachzeitschriftArtikel

Abstract

Multiple-time spin-alignment echo (SAE) NMR spectroscopy of spin-3/2 nuclei is used to study ultraslow diffusion in the hexagonal layered Li ion conductor LixTiS2 (x ≈1). Two-time correlation functions were monitored by recording (Jeener-Broekaert) echo amplitudes for constant evolution and variable mixing times. Echo decay rates τSAE -1 being directly related to Li jump rates, take values ranging from 2s -1 to 570 s-1 between temperatures T = 185 K and 293 K. The temperature dependence of τSAE -1 shows Arrhenius behaviour with an activation energy of 0.26(1) eV, being similar to that obtained by spin-lattice relaxation measurements in the rotating as well as in the laboratory frame at higher temperatures.

Originalspracheenglisch
Seiten (von - bis)1182-1187
Seitenumfang6
FachzeitschriftDefect and Diffusion Forum
Jahrgang237-240
AusgabenummerPART 2
PublikationsstatusVeröffentlicht - 1 Jan 2005
Extern publiziertJa

ASJC Scopus subject areas

  • !!Radiation
  • !!Materials Science(all)
  • !!Condensed Matter Physics

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