73Ge-NQR study of heavy-fermion compound CeNi2 Ge2

S. Kawasaki; T. Sada; T. Miyoshi; H. Kotegawa; H. Mukuda; Y. Kitaoka; T. C. Kobayashi; T. Fukuhara; K. Maezawa; K. M. Itoh; E. E. Haller

doi:10.1016/j.jmmm.2006.10.232

⁷³Ge-NQR study of heavy-fermion compound CeNi₂ Ge₂

S. Kawasaki, T. Sada, T. Miyoshi, H. Kotegawa, H. Mukuda, Y. Kitaoka, T. C. Kobayashi, T. Fukuhara, K. Maezawa, K. M. Itoh, E. E. Haller

Department of Applied Physics and Physico-Informatics

Research output: Contribution to journal › Article

Abstract

We report ⁷³Ge-nuclear-quadrupole resonance (NQR) study of heavy-fermion compound CeNi₂ Ge₂. The temperature dependence of the ⁷³Ge nuclear-spin-lattice-relaxation rate 1 / T₁ indicates the development of magnetic correlations and the formation of a Fermi-liquid state at temperatures lower than T_FL = 0.4 K, where 1 / T₁ T is constant. The 1 / T₁ T decrease below T_c^NQR = 0.1 K, whereas resistance decreases below T_c^onset = 0.2 K and does not become zero. These results indicate CeNi₂ Ge₂ closely locates to a superconducting quantum critical point.

Original language	English
Pages (from-to)	590-592
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.2006.10.232
Publication status	Published - 2007 Mar 1

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Keywords

CeNi Ge
Heavy fermion
NQR

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Cite this

Kawasaki, S., Sada, T., Miyoshi, T., Kotegawa, H., Mukuda, H., Kitaoka, Y., Kobayashi, T. C., Fukuhara, T., Maezawa, K., Itoh, K. M., & Haller, E. E. (2007). ⁷³Ge-NQR study of heavy-fermion compound CeNi₂ Ge₂. Journal of Magnetism and Magnetic Materials, 310(2 SUPPL. PART 1), 590-592. https://doi.org/10.1016/j.jmmm.2006.10.232

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title = "73Ge-NQR study of heavy-fermion compound CeNi2 Ge2",

abstract = "We report 73Ge-nuclear-quadrupole resonance (NQR) study of heavy-fermion compound CeNi2 Ge2. The temperature dependence of the 73Ge nuclear-spin-lattice-relaxation rate 1 / T1 indicates the development of magnetic correlations and the formation of a Fermi-liquid state at temperatures lower than TFL = 0.4 K, where 1 / T1 T is constant. The 1 / T1 T decrease below TcNQR = 0.1 K, whereas resistance decreases below Tconset = 0.2 K and does not become zero. These results indicate CeNi2 Ge2 closely locates to a superconducting quantum critical point.",

keywords = "CeNi Ge, Heavy fermion, NQR",

author = "S. Kawasaki and T. Sada and T. Miyoshi and H. Kotegawa and H. Mukuda and Y. Kitaoka and Kobayashi, {T. C.} and T. Fukuhara and K. Maezawa and Itoh, {K. M.} and Haller, {E. E.}",

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T1 - 73Ge-NQR study of heavy-fermion compound CeNi2 Ge2

AU - Kawasaki, S.

AU - Sada, T.

AU - Miyoshi, T.

AU - Kotegawa, H.

AU - Mukuda, H.

AU - Kitaoka, Y.

AU - Kobayashi, T. C.

AU - Fukuhara, T.

AU - Maezawa, K.

AU - Itoh, K. M.

AU - Haller, E. E.

PY - 2007/3/1

Y1 - 2007/3/1

N2 - We report 73Ge-nuclear-quadrupole resonance (NQR) study of heavy-fermion compound CeNi2 Ge2. The temperature dependence of the 73Ge nuclear-spin-lattice-relaxation rate 1 / T1 indicates the development of magnetic correlations and the formation of a Fermi-liquid state at temperatures lower than TFL = 0.4 K, where 1 / T1 T is constant. The 1 / T1 T decrease below TcNQR = 0.1 K, whereas resistance decreases below Tconset = 0.2 K and does not become zero. These results indicate CeNi2 Ge2 closely locates to a superconducting quantum critical point.

AB - We report 73Ge-nuclear-quadrupole resonance (NQR) study of heavy-fermion compound CeNi2 Ge2. The temperature dependence of the 73Ge nuclear-spin-lattice-relaxation rate 1 / T1 indicates the development of magnetic correlations and the formation of a Fermi-liquid state at temperatures lower than TFL = 0.4 K, where 1 / T1 T is constant. The 1 / T1 T decrease below TcNQR = 0.1 K, whereas resistance decreases below Tconset = 0.2 K and does not become zero. These results indicate CeNi2 Ge2 closely locates to a superconducting quantum critical point.

KW - CeNi Ge

KW - Heavy fermion

KW - NQR

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10.1016/j.jmmm.2006.10.232