119Sn NMR on the correlated semi-metal CeRu4 Sn6

E. M. Brüning; M. Baenitz; A. A. Gippius; A. M. Strydom; F. Steglich; R. E. Walstedt

doi:10.1016/j.jmmm.2006.10.100

¹¹⁹Sn NMR on the correlated semi-metal CeRu₄ Sn₆

E. M. Brüning, M. Baenitz, A. A. Gippius, A. M. Strydom, F. Steglich, R. E. Walstedt

Physics

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

4 Citations (Scopus)

Abstract

We report on ¹¹⁹Sn (I = frac(1, 2)) field-sweep NMR measurements on the tetragonal semimetal CeRu₄ Sn₆ and the metallic non-magnetic homologue LaRu₄ Sn₆ at a frequency of 47 MHz. In contrast to our previous investigations at 28.5 MHz, the spectra clearly show the signature of two different Sn sites. Furthermore, in spin-lattice relaxation measurements ¹¹⁹(1 / T₁), CeRu₄ Sn₆ exhibits semiconducting like behavior above 20 K, whereas below this temperature, ¹¹⁹(1 / T₁) deviates towards higher values. This upturn could be either due to the formation of heavy quasiparticles out of a residual density of states or the result of low energy spin fluctuations claimed by recent μ SR investigations.

Original language	English
Pages (from-to)	393-395
Number of pages	3
Journal	Journal of Magnetism and Magnetic Materials
Volume	310
Issue number	2 SUPPL. PART 1
DOIs	https://doi.org/10.1016/j.jmmm.2006.10.100
Publication status	Published - Mar 2007

Keywords

Knight shift
Nuclear magnetic resonance
Spin-lattice relaxation

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1016/j.jmmm.2006.10.100

Cite this

@article{04fc971880e544a39c1a0f3d67f1a569,

title = "119Sn NMR on the correlated semi-metal CeRu4 Sn6",

abstract = "We report on 119Sn (I = frac(1, 2)) field-sweep NMR measurements on the tetragonal semimetal CeRu4 Sn6 and the metallic non-magnetic homologue LaRu4 Sn6 at a frequency of 47 MHz. In contrast to our previous investigations at 28.5 MHz, the spectra clearly show the signature of two different Sn sites. Furthermore, in spin-lattice relaxation measurements 119(1 / T1), CeRu4 Sn6 exhibits semiconducting like behavior above 20 K, whereas below this temperature, 119(1 / T1) deviates towards higher values. This upturn could be either due to the formation of heavy quasiparticles out of a residual density of states or the result of low energy spin fluctuations claimed by recent μ SR investigations.",

keywords = "Knight shift, Nuclear magnetic resonance, Spin-lattice relaxation",

author = "Br{\"u}ning, {E. M.} and M. Baenitz and Gippius, {A. A.} and Strydom, {A. M.} and F. Steglich and Walstedt, {R. E.}",

year = "2007",

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doi = "10.1016/j.jmmm.2006.10.100",

language = "English",

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pages = "393--395",

journal = "Journal of Magnetism and Magnetic Materials",

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TY - JOUR

T1 - 119Sn NMR on the correlated semi-metal CeRu4 Sn6

AU - Brüning, E. M.

AU - Baenitz, M.

AU - Gippius, A. A.

AU - Strydom, A. M.

AU - Steglich, F.

AU - Walstedt, R. E.

PY - 2007/3

Y1 - 2007/3

N2 - We report on 119Sn (I = frac(1, 2)) field-sweep NMR measurements on the tetragonal semimetal CeRu4 Sn6 and the metallic non-magnetic homologue LaRu4 Sn6 at a frequency of 47 MHz. In contrast to our previous investigations at 28.5 MHz, the spectra clearly show the signature of two different Sn sites. Furthermore, in spin-lattice relaxation measurements 119(1 / T1), CeRu4 Sn6 exhibits semiconducting like behavior above 20 K, whereas below this temperature, 119(1 / T1) deviates towards higher values. This upturn could be either due to the formation of heavy quasiparticles out of a residual density of states or the result of low energy spin fluctuations claimed by recent μ SR investigations.

AB - We report on 119Sn (I = frac(1, 2)) field-sweep NMR measurements on the tetragonal semimetal CeRu4 Sn6 and the metallic non-magnetic homologue LaRu4 Sn6 at a frequency of 47 MHz. In contrast to our previous investigations at 28.5 MHz, the spectra clearly show the signature of two different Sn sites. Furthermore, in spin-lattice relaxation measurements 119(1 / T1), CeRu4 Sn6 exhibits semiconducting like behavior above 20 K, whereas below this temperature, 119(1 / T1) deviates towards higher values. This upturn could be either due to the formation of heavy quasiparticles out of a residual density of states or the result of low energy spin fluctuations claimed by recent μ SR investigations.

KW - Knight shift

KW - Nuclear magnetic resonance

KW - Spin-lattice relaxation

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DO - 10.1016/j.jmmm.2006.10.100

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