12-15 July 2011
Saint George Hotel
Africa/Johannesburg timezone
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Low-temperature magnetic ordering in Ce6Pd12In5

Presented by Prof. Andre STRYDOM on 13 Jul 2011 from 17:00 to 19:00
Type: Poster Presentation
Session: Poster1
Track: Track A - Condensed Matter Physics and Material Science


<p>The novel ternary intermetallic compound Ce<sub>6</sub>Pd<sub>12</sub>In<sub>5</sub> forms in a well-defined atomic stoichiometry with a hexagonal crystal structure (space group P6<sub>3</sub>/mcm) and a unique atom in each of the crystallographic sites available in this space group. The bonding lengths are comparatively short and suggest strong interaction especially between Ce and Pd atoms. In this work we report on our findings of the first studies into the physical properties of Ce<sub>6</sub>Pd<sub>12</sub>In<sub>5</sub>. A key finding is the occurrence of long-range ferromagnetic-like order below TC =1.6 K, where the specific turns into a lambda-like anomaly peaking at C<sub>P</sub> = 8 J/(mol Ce K). The electrical resistivity hints at a low-lying Kondo scale in this compound. The magnetic susceptibility shows well-defined Curie-Weiss behaviour over an extended temperature range with an effective magnetic moment value that is indicative of conduction-electron hybridization effects on the Ce localized moment. The 4f–electron derived magnetic contributions to the entropy and to the electrical resistivity in Ce<sub>6</sub>Pd<sub>12</sub>In<sub>5</sub> are assessed by means of the nonmagnetic counterpart La<sub>6</sub>Pd<sub>12</sub>In<sub>5</sub>.

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Room: Asteria

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