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

Martin Wilkening; Paul Heitjans

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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 Li_xTiS₂ (x ≈1). Two-time correlation functions were monitored by recording (Jeener-Broekaert) echo amplitudes for constant evolution and variable mixing times. Echo decay rates τ_SAE ^-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 τ_SAE ^-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.

Original language	English
Pages (from-to)	1182-1187
Number of pages	6
Journal	Defect and Diffusion Forum
Volume	237-240
Issue number	PART 2
Publication status	Published - 1 Jan 2005
Externally published	Yes

Keywords

Lithium titanlum disulfide
NMR relaxation
Solid state NMR
Spin-alignment
Ultraslow diffusion

ASJC Scopus subject areas

Radiation
Materials Science(all)
Condensed Matter Physics

Cite this

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

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.",

keywords = "Lithium titanlum disulfide, NMR relaxation, Solid state NMR, Spin-alignment, Ultraslow diffusion",

author = "Martin Wilkening and Paul Heitjans",

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language = "English",

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journal = "Defect and Diffusion Forum",

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T1 - Ultraslow diffusion in polycrystalllne h-LITIS2 studied by 7Li spln-alignment echo NMR spectroscopy

AU - Wilkening, Martin

AU - Heitjans, Paul

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N2 - 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.

AB - 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.

KW - Lithium titanlum disulfide

KW - NMR relaxation

KW - Solid state NMR

KW - Spin-alignment

KW - Ultraslow diffusion

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M3 - Article

AN - SCOPUS:29744450918

SN - 0377-6883

VL - 237-240

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JO - Defect and Diffusion Forum

JF - Defect and Diffusion Forum

IS - PART 2

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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