MYDOSH, John A.; STRYDOM, Andre M.; BAENITZ, Michael; CHEVALIER, Bernard; HERMES, Wilfried; PÖTTGEN, Rainer

doi:10.1103/PhysRevB.83.054411

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MYDOSH, John A.
Max-Planck-Institut für Chemische Physik fester Stoffe [CPfS]
Universiteit Leiden = Leiden University

STRYDOM, Andre M.
Max-Planck-Institut für Chemische Physik fester Stoffe [CPfS]
University of Johannesburg [South Africa] [UJ]

BAENITZ, Michael
Max-Planck-Institut für Chemische Physik fester Stoffe [CPfS]

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Physical Review B. 2011, vol. 83, n° 5, p. 054411 (6 p.)

American Physical Society

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We report the thermodynamic and transport properties of the newly synthesized Ce-intermetallic compound CeRuSn. This ternary stannide possesses an unconventional structure with two Ce sites at room temperature which exhibit different valencies. Just below room temperature there are large thermal hysteretic effects in the magnetic susceptibility, in the specific heat, as well as in electronic and heat transport properties suggesting the formation of an incommensurate charge density wave modulation whose q vector changes as a function of temperature. Our measurements indicate that one site displays magnetic Ce<sup>3+</sup> behavior while the other is a valence fluctuator. At 2.7 K antiferromagnetic long-range order occurs within one-half of the Ce sites, e.g., the magnetic entropy of the transition is 1/2Rln2. Below T<sub>N</sub> a series of metamagnetic transitions takes place in rather small fields (~1–2 T), leaving a magnetically fluctuating background. Such behavior is unique among the many Ce–transition-metal compounds.< Réduire

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Hysteretic behavior and magnetic ordering in CeRuSn

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