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 › peer-review

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

Keywords

CeNi Ge
Heavy fermion
NQR

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1016/j.jmmm.2006.10.232

Cite this

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

In: Journal of Magnetism and Magnetic Materials, Vol. 310, No. 2 SUPPL. PART 1, 01.03.2007, p. 590-592.

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

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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

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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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