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La-alloying study of CeCoGe2: Magnetic susceptibility and specific heat measurements

Domenii publicaţii > Fizica + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: C R Rotundu and B Andraka

Editorial: Physical Review B, 74, p.224423, 2006.

Rezumat:

We report measurements of magnetic susceptibility and specific heat for polycrystalline Ce1-xLaxCoGe2 for
x=0, 0.1, 0.2, 0.3, 0.5, and 1. CeCoGe2 is considered as a concentrated J=5/2 Kondo system. We have found
significant preferential orientation in the magnetic susceptibility implying magnetic anisotropy. Magnetic susceptibility
and specific heat results do not corroborate the single impurity model and imply the importance of
crystalline electric fields and magnetic correlations. Low-temperature specific heat and susceptibility data for
x=0.2 suggest a possibility of a two-dimensional antiferromagnetic quantum critical point.

Cuvinte cheie: heavy fermion

URL: http://prola.aps.org/searchabstract/PRB/v74/i22/e224423?qid=263cf67679655e0c&qseq=1&show=25