Magnetic behavior in a series of cerium ternary intermetallics: Ce{sub 2}{ital T}{sub 2}In ({ital T}=Ni, Cu, Rh, Pd, Pt, and Au)

Journal Article · Tue Oct 01 04:00:00 EDT 1996 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.54.9891· OSTI ID:390388

Kaczorowski, D ^[1]; Rogl, P; Hiebl, K ^[2]

---

1. W. Trzebiatowski Institute for Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 937, 50-950 Wroclaw, (Poland)
2. Institut fuer Physikalische Chemie, Universitaet Wien, Waehringerstrase 42, A-1090 Wien (Austria)

A group of ternary cerium compounds Ce{sub 2}{ital T}{sub 2}In ({ital T}=Ni, Cu, Rh, Pd, Pt, and Au) has been synthesized. As found from single-crystal and powder x-ray-diffraction studies, all these phases crystallize in a primitive tetragonal structure of the Mo{sub 2}FeB{sub 2} type. Magnetic measurements (magnetization, dc and ac susceptibility) have revealed the physical properties of these intermetallics to be mainly governed by the 4{ital f}-{ital d} hybridization. Depending on the filling of the transition metal {ital d} band the ground state in Ce{sub 2}{ital T}{sub 2}In changes from a nonmagnetic to a well localized magnetic regime. It was proved that Ce{sub 2}Ni{sub 2}In and Ce{sub 2}Rh{sub 2}In are intermediate-valence systems, Ce{sub 2}Pt{sub 2}In is a strongly temperature-dependent paramagnet, whereas Ce{sub 2}Cu{sub 2}In, Ce{sub 2}Pd{sub 2}In, and Ce{sub 2}Au{sub 2}In order magnetically at low temperatures. Measurements of the electrical resistivity have corroborated the intermediate-valence behavior in Ce{sub 2}Ni{sub 2}In and Ce{sub 2}Rh{sub 2}In. In turn, the resistivity of the remaining ternaries studied was found to be determined by an interplay of Kondo scattering and crystal-field effects. For Ce{sub 2}Pt{sub 2}In which behaves like a spin-fluctuating system due to strong Kondo-type interactions a nonmagnetic heavy-fermion ground state probably occurs. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 390388
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 14 Vol. 54; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERIUM COMPOUNDS
COPPER COMPOUNDS
CRYSTAL STRUCTURE
GOLD COMPOUNDS
HEAVY FERMIONS
INDIUM COMPOUNDS
INTERMEDIATE VALENCE
INTERMETALLIC COMPOUNDS
KONDO EFFECT
MAGNETIC PROPERTIES
NICKEL COMPOUNDS
PALLADIUM COMPOUNDS
PLATINUM COMPOUNDS
RHODIUM COMPOUNDS
TEMPERATURE DEPENDENCE