Elsevier

Physica B: Condensed Matter

Volumes 359–361, 30 April 2005, Pages 108-110
Physica B: Condensed Matter

Electrical resistivity and tunneling anomalies in CeCuAs2

https://doi.org/10.1016/j.physb.2005.01.005Get rights and content

Abstract

The compound CeCuAs2 is found to exhibit negative temperature (T) coefficient of electrical resistivity (ρ) under ambient pressure conditions in the entire T-range of investigation (45 mK–300 K), even in the presence of high magnetic fields. Preliminary tunneling spectroscopic measurements indicate the existence of a psuedo-gap at least at low temperatures, thereby implying that this compound could be classified as a Kondo semi-conductor, though ρ(T) interestingly is not found to be of an activated type.

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    2012, Journal of Magnetism and Magnetic Materials
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    In this superstructure, two fourfold positions for the Ce atoms, the Ag atoms and the As atoms of the PbO-like layer have to be considered, whereas the As atoms of the cis–trans chains adopt one eightfold Wyckoff site (cf. Table 3). The majority of rare earth metal – coinage metal – diarsenides LnMAs2 (Ln=La, Ce–Lu; M=Cu, Ag, Au) shows antiferromagnetic order at temperatures below TN≈20 K [6–11]. Several LnMAs2 compounds exhibit interesting magnetic and transport properties, some of them are discussed as possible Kondo systems [7,10].

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