Metal-nonmetal transition in Ge doped spinel-type CuCr2 S4

Y. Kamihara; M. Matoba; T. Kyomen; M. Itoh

doi:10.1016/j.physb.2006.01.539

Metal-nonmetal transition in Ge doped spinel-type CuCr₂ S₄

Y. Kamihara, M. Matoba, T. Kyomen, M. Itoh

Department of Applied Physics and Physico-Informatics

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

2 Citations (Scopus)

Abstract

CuCr₂ S₄ shows a p-type metallic conductivity and ferromagnetism with Curie temperatures T_c of 375 K, and exhibits magnetic anomaly at 84 K ( = T_m ). The partial Ge substitution for Cu in CuCr₂ S₄ greatly reduces T_c. Moreover Ge-substitution gives metal-nonmetal transition at x = frac(1, 8) in Cu_{1 - x} Ge_x Cr₂ S₄. These results suggest that Cr 3d band filling control can be expected to give functional magnetoelectric transport properties in CuCr₂ S₄.

Original language	English
Pages (from-to)	1120-1121
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	378-380
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physb.2006.01.539
Publication status	Published - 2006 May 1

Keywords

Anomalous magnetism
Ferromagnetic order
Magnetoresistance
Thiospinel
Transition metal

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1016/j.physb.2006.01.539

Cite this

@article{8dbeb86d7dda4af39729d123f565cd79,

title = "Metal-nonmetal transition in Ge doped spinel-type CuCr2 S4",

abstract = "CuCr2 S4 shows a p-type metallic conductivity and ferromagnetism with Curie temperatures Tc of 375 K, and exhibits magnetic anomaly at 84 K ( = Tm ). The partial Ge substitution for Cu in CuCr2 S4 greatly reduces Tc. Moreover Ge-substitution gives metal-nonmetal transition at x = frac(1, 8) in Cu1 - x Gex Cr2 S4. These results suggest that Cr 3d band filling control can be expected to give functional magnetoelectric transport properties in CuCr2 S4.",

keywords = "Anomalous magnetism, Ferromagnetic order, Magnetoresistance, Thiospinel, Transition metal",

author = "Y. Kamihara and M. Matoba and T. Kyomen and M. Itoh",

note = "Funding Information: One (Y. K) of us was financially supported by the Keio Leading-edge Laboratory of Science and Technology (KLL). Copyright: Copyright 2008 Elsevier B.V., All rights reserved.",

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doi = "10.1016/j.physb.2006.01.539",

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T1 - Metal-nonmetal transition in Ge doped spinel-type CuCr2 S4

AU - Kamihara, Y.

AU - Matoba, M.

AU - Kyomen, T.

AU - Itoh, M.

PY - 2006/5/1

Y1 - 2006/5/1

N2 - CuCr2 S4 shows a p-type metallic conductivity and ferromagnetism with Curie temperatures Tc of 375 K, and exhibits magnetic anomaly at 84 K ( = Tm ). The partial Ge substitution for Cu in CuCr2 S4 greatly reduces Tc. Moreover Ge-substitution gives metal-nonmetal transition at x = frac(1, 8) in Cu1 - x Gex Cr2 S4. These results suggest that Cr 3d band filling control can be expected to give functional magnetoelectric transport properties in CuCr2 S4.

AB - CuCr2 S4 shows a p-type metallic conductivity and ferromagnetism with Curie temperatures Tc of 375 K, and exhibits magnetic anomaly at 84 K ( = Tm ). The partial Ge substitution for Cu in CuCr2 S4 greatly reduces Tc. Moreover Ge-substitution gives metal-nonmetal transition at x = frac(1, 8) in Cu1 - x Gex Cr2 S4. These results suggest that Cr 3d band filling control can be expected to give functional magnetoelectric transport properties in CuCr2 S4.

KW - Anomalous magnetism

KW - Ferromagnetic order

KW - Magnetoresistance

KW - Thiospinel

KW - Transition metal

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