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  Heavy fermion and Kondo lattice behavior in the itinerant ferromagnet CeCrGe3

Das, D., Gruner, T., Pfau, H., Paramanik, U. B., Burkhardt, U., Geibel, C., et al. (2014). Heavy fermion and Kondo lattice behavior in the itinerant ferromagnet CeCrGe3. Journal of Physics: Condensed Matter, 26(10): 106001, pp. 1-6. doi:10.1088/0953-8984/26/10/106001.

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Das, Debarchan1, Autor
Gruner, T.2, Autor           
Pfau, H.2, Autor           
Paramanik, U. B.1, Autor
Burkhardt, U.3, Autor           
Geibel, C.4, Autor           
Hossain, Z.2, Autor           
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              
3Ulrich Burkhardt, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863422              
4Christoph Geibel, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863465              

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Schlagwörter: PRESSURE-INDUCED SUPERCONDUCTIVITY; MAGNETIC-PROPERTIES; COMPOUND; TEMPERATURE; DIFFRACTION; CECOGE3; MODELPhysics; magnetic order; Kondo lattice; heavy fermion; thermopower; crystal field effect;
 Zusammenfassung: Physical properties of polycrystalline CeCrGe3 and LaCrGe3 have been investigated by x-ray absorption spectroscopy, magnetic susceptibility chi(T), isothermal magnetization M(H), electrical resistivity rho(T), specific heat C(T) and thermoelectric power S(T) measurements. These compounds are found to crystallize in the hexagonal perovskite structure (space group P6(3)/mmc), as previously reported. The rho(T), chi(T) and C(T) data confirm the bulk ferromagnetic ordering of itinerant Cr moments in LaCrGe3 and CeCrGe3 with T-C = 90 K and 70 K respectively. In addition, a weak anomaly is also observed near 3 K in the C(T) data of CeCrGe3. The T dependences of rho and finite values of Sommerfeld coefficient gamma obtained from the specific heat measurements confirm that both the compounds are of metallic character. Further, the T dependence of rho of CeCrGe3 reflects a Kondo lattice behavior. An enhanced gamma of 130 mJ mol(-1) K-2 together with the Kondo lattice behavior inferred from the rho(T) establish CeCrGe3 as a moderate heavy fermion compound with a quasi-particle mass renormalization factor of similar to 45.

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Sprache(n): eng - English
 Datum: 2014-02-19
 Publikationsstatus: Erschienen
 Seiten: 6
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: ISI: 000332377400015
DOI: 10.1088/0953-8984/26/10/106001
 Art des Abschluß: -

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Titel: Journal of Physics: Condensed Matter
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Bristol, UK : IOP Pub.
Seiten: - Band / Heft: 26 (10) Artikelnummer: 106001 Start- / Endseite: 1 - 6 Identifikator: ISSN: 0953-8984
CoNE: https://pure.mpg.de/cone/journals/resource/954928562478