Strongly Correlated Electron Behaviour in CeT_2Al_8 (T~=~Fe,~Co)

• Authors: S. Ghosh , A. Strydom
• Languages of publication: EN

Abstracts

EN

We report on studies of physical properties of the two compounds CeFe_2Al_8 and CeCo_2Al_8 in which we have found varying degrees of electronic correlational phenomena. No magnetic ordering was detected down to 0.4 K in either of the two compounds. At elevated temperatures an incoherent Kondo interaction between the Ce 4f-electron and the conduction electrons is prevalent in both compounds. CeCo_2Al_8 exhibits a stable 4f-electron magnetic moment, but in CeFe_2Al_8 an intermediate-valent state prevails near room temperature that eventually transforms into a Fermi-liquid ground state. The low-temperature specific heat of CeCo_2Al_8 shows typical strongly correlated electron behaviour and a - logT upturn in its electronic specific heat below about 10 K.

Keywords

EN

75.40.Cx   71.27.+a   75.30.Mb   75.20.Hr  

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 121
• Issue: 5-6
• Pages: 1082-1084

Dates

published

2012-05

References

• 1. O.M. Sichevich, R.V. Lapunova, Yu.N. Grin, Ya.P. Yarmolyuk, Izv. Akad. Nauk SSSR Metally 6, 117 (1985)
• 2. M.D. Koterlin, B.S. Morokhivskiĭ, R.V. Lapunova, O.M. Sichevich, Sov. Phys.-Solid State 31, 1826 (1989)
• 3. I. Tamura, T. Mizushima, Y. Isikawa, J. Sakurai, J. Magn. Magn. Mater. 220, 31 (2000)
• 4. M. Kolenda, M.D. Koterlin, M. Hofmann, B. Penc, A. Szytuła, A. Zygmunt, J. Żukrowski, J. Alloys Comp. 327, 21 (2001)
• 5. M.D. Koterlin, B.S. Morokhivskiĭ, N.G. Babich, N.I. Zakharenko, R.R. Kutyanskiĭ, Phys. Solid. State 38, 1924 (1996)
• 6. Quantum Design, Inc., 6325 Lusk Boulevard, San Diego, CA 92121, USA
• 7. iQuantum Corporation, A-212-2 Main Building, AIST Central-2, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan
• 8. A.M. Strydom, S. Ghosh, to be published
• 9. B.C. Sales, D.K. Wohlleben, Phys. Rev. Lett. 35, 1240 (1975)
• 10. T. Konishi, K. Morikawa, K. Kobayashi, T. Mizokawa, A. Fujimori, K. Mamiya, F. Iga, H. Kawanaka, Y. Nishihara, A. Delin, O. Eriksson, Phys. Rev. B 62, 14304 (2000)
• 11. M.B. Maple, N.R. Dilley, D.A. Gajewski, E.D. Bauer, E.J. Freeman, R. Chau, D. Mandrus, B.C. Sales, Physica B 259-261, 8 (1999)
• 12. G.P. Meisner, M.S. Torikachvili, K.N. Yang, M.B. Maple, R.P. Guertin, J. Appl. Phys. 57, 3073 (1985)
• 13. Y. Muro, K. Motoya, Y. Saiga, T. Takabatake, J. Phys. Soc. Jpn. 78, 083707 (2009)

Identifiers

DOI

10.12693/APhysPolA.121.1082