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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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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0018-F335-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0000-FF06-B
Genre: Journal Article

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 Creators:
Das, Debarchan1, Author
Gruner, T.2, Author              
Pfau, H.2, Author              
Paramanik, U. B.1, Author
Burkhardt, U.3, Author              
Geibel, C.4, Author              
Hossain, Z.2, Author              
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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Free keywords: PRESSURE-INDUCED SUPERCONDUCTIVITY; MAGNETIC-PROPERTIES; COMPOUND; TEMPERATURE; DIFFRACTION; CECOGE3; MODELPhysics; magnetic order; Kondo lattice; heavy fermion; thermopower; crystal field effect;
 Abstract: 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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Language(s): eng - English
 Dates: 2014-02-19
 Publication Status: Published in print
 Pages: 6
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Degree: -

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Title: Journal of Physics: Condensed Matter
Source Genre: Journal
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Publ. Info: Bristol, UK : IOP Pub.
Pages: - Volume / Issue: 26 (10) Sequence Number: 106001 Start / End Page: 1 - 6 Identifier: ISSN: 0953-8984
CoNE: /journals/resource/954928562478