Title variants
Languages of publication
Abstracts
Transport and thermodynamic properties of the well-ordered hexagonal CeAuGe compound have been studied. This compound is known to order ferromagnetically at T_{C} = 10 K with well-defined anomalies in magnetic susceptibility χ(T), electrical resistivity ρ(T) and specific heat C_p(T) characterising the phase transition. The location of T_{C} has been observed to be unstable and enhanced even in moderate applied magnetic fields. However, the dilution of magnetic species, Ce, with the non-f electron element, La, is shown in this work to achieve a continuous suppression of T_{C} to 0 K. The integrity of the space group and the details of the unit cell occupation are retained throughout the substitution series, as is the high-temperature localized Ce-effective magnetic moment μ_{eff} = 2.54 μ_{B}/(mol Ce). Our studies of physical properties down to 0.05 K show a quantum critical form of non-Fermi liquid behaviour, characterised by a logarithmic divergence in C_p(T)/T data in the very dilute Ce content.
Discipline
- 75.30.Cr: Saturation moments and magnetic susceptibilities
- 75.30.Mb: Valence fluctuation, Kondo lattice, and heavy-fermion phenomena(see also 71.27.+a Strongly correlated electron systems, heavy fermions; for heavy-fermion superconductors, see 74.70.Tx)
- 75.30.Kz: Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)(for ferroelectric phase transitions, see 77.80.B-; for superconductivity phase diagrams, see 74.25.Dw)
Journal
Year
Volume
Issue
Pages
228-230
Physical description
Dates
published
2015-02
Contributors
author
- Highly Correlated Matter Research Group, Physics Department, University of Johannesburg, South Africa
author
- Highly Correlated Matter Research Group, Physics Department, University of Johannesburg, South Africa
References
- [1] G.R. Stewart, Rev. Mod. Phys. 56, 755 (1984)
- [2] H. Ikeda, J. Phys. Soc. Jpn. 71, 1126 (2002)
- [3] M.B. Maple, C.L. Seaman, D.A. Gajewski, Y. Dalichaoueh, V.B. Barbetta, M.C. de Andrade, H.A. Mook, H.G. Lukefahr, O.O. Bernal, D.E. MacLaughlin, J. Low Temp. Phys. 95, 225 (1994)
- [4] G.R. Stewart, Rev. Mod. Phys. 73, 797 (2001)
- [5] E.D. Bauer, V.S. Zapf, P.C. Ho, N.P. Butch, E.J. Freeman, C. Sirvent, M.B. Maple, Phys. Rev. Lett. 94, 046401 (2005)
- [6] R. Pöttgen, H. Borrmann, R.K. Kremer, J. Magn. Magn. Mater. 152, 196 (1996)
- [7] B.M. Mhlungu, A.M. Strydom, Physica B 403, 3062 (2008)
- [8] R. Pöttgen, H. Borrmann, C. Felser, O. Jepsen, R. Henn, R.K. Kremer, A. Simon, J. Alloys Comp. 235, 170 (1996)
- [9] M.B. Maple, D.A. Gajewski, R. Chau, P. Dai, R. Movshovich, C.L. Seaman, Physica B 223, 447 (1996)
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv127n2019kz