Evidence for a dimensionality crossover at the disappearance of magnetism in 
the Kondo lattice alloy CeCo1-xFexSi

Sereni, J. G.; Gomez Berisso, M.; Betancourth, D.; Correa, V. F.; Caroca-Canales, N.; Geibel, C.

doi:10.1103/PhysRevB.89.035107

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Evidence for a dimensionality crossover at the disappearance of magnetism in the Kondo lattice alloy CeCo_1-xFe_xSi

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Caroca-Canales, N.
Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Geibel, C.
Christoph Geibel, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Sereni, J. G., Gomez Berisso, M., Betancourth, D., Correa, V. F., Caroca-Canales, N., & Geibel, C. (2014). Evidence for a dimensionality crossover at the disappearance of magnetism in the Kondo lattice alloy CeCo_1-xFe_xSi. Physical Review B, 89(3): 035107, pp. 1-6. doi:10.1103/PhysRevB.89.035107.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0018-8607-1

Abstract

Structural, magnetic, and thermal measurements performed on CeCo1-xFexSi alloys are reported. Three regions can be recognized: (i) Co rich (x <= 0.20) with a decreasing long-range antiferromagnetic order which vanishes at finite temperatures, (ii) an intermediate region (0.20 < x <= 0.30) showing a broad magnetic anomaly (C-A) in specific heat, and (iii) the nonmagnetic region progressively changing from a non-Fermi-liquid-type behavior towards a Fermi-liquid one as Fe concentration increases. The C-A anomaly emerges as an incipient contribution above T-N already at x = 0.10, which indicates that this contribution is related to short-range correlations likely of quasi-two-dimensional type. Both T-N transition and C-A anomaly are practically unaffected by an applied magnetic field up to B approximate to 10 T.