T Sasakawa et al 2002 J. Phys.: Condens. Matter 14 L267 doi:10.1088/0953-8984/14/12/106
Magnetic and transport properties of a new valence-fluctuating compound, CeRhP
FREE ARTICLET Sasakawa, T Suemitsu, J Kitagawa, O Sologub, P Salamakha and T Takabatake1
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We have synthesized CeRhP, aiming at breaking new ground as regards the CeRhPn (Pn = pnictogen) system. X-ray powder diffraction analysis shows that CeRhP crystallizes into the tetragonal LaPtSi-type structure. Both the magnetic susceptibility and thermopower exhibit a broad peak around 170 K, and the specific heat gives an electronic specific-heat coefficient of 30 mJ K-2 mol-1. These results indicate that CeRhP is a valence-fluctuating compound with a Kondo temperature of 400-500 K. The electrical resistivity shows a metallic behaviour, in contrast to the semimetal or semiconducting behaviour in CeRhSb and CeRhAs, with the orthorhombic ε-TiNiSi-type structure. This stresses the importance of the crystal symmetry to the gap formation in the CeRhPn series.
- PACS
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75.30.Cr Saturation moments and magnetic susceptibilities
61.50.Ah Theory of crystal structure, crystal symmetry; calculations and modeling
72.15.Jf Thermoelectric and thermomagnetic effects
75.30.Mb Valence fluctuation, Kondo lattice, and heavy-fermion phenomena
- Subjects
- Dates
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Issue 12 (1 April 2002)
Received 6 February 2002, in final form 19 February 2002
Published 15 March 2002
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