Pressure-Induced Electronic Transition in CeAl2
The room-temperature resistance of CeAl2 passes through a faint maximum around 60 kBar and falls off at higher pressure. Strong anomalies were previously reported for the temperature-dependence of the resistivity under pressure up to 15 kBar by Nicolas-Francillon et al. It has been found that these anomalies gradually disappear with even higher pressures. They are entirely suppressed at pressures exceeding ≃120 kBar resulting in a R-T characteristic being very similar to that of the nonmagnetic compound LaAl2. There is a striking similarity to the R vs. T behavior of pure cerium in the β or γ phase on the one hand and in the a phase on the other hand. We conclude that CeAl2 undergoes a continuous electronic transition with pressure just as Ce above the critical point.
KeywordsPhonon Contribution Pure Cerium Strong Anomaly Lave Phase Compound Shallow Maximum
Unable to display preview. Download preview PDF.
- 1.C. Probst and J. Wittig, in Handbook on the Physics and Chemistry of Rare Earths, edited by K.A. Gschneidner, Jr. and L. Eyring, (North-Holland Publ. Comp., Amsterdam), Chapter 10, in print.Google Scholar
- 2.H.H. Hill, in Plutonium 1970 and Other Actinides, editor W.N. Miner, (New York:AIME), p.2, 1970.Google Scholar
- 5.C. Probst and J. Wittig, Proc. 14th Internat. Conf. on Low Temp. Phys., Otaniemi 1975, editors M. Krusius and M. Vuorio, (North-Holland Publ. Comp., Amsterdam), Vol. 5, p.453, (1975).Google Scholar
- 7.C. Probst and J. Wittig, to be published.Google Scholar
- 10.F. Steglich, Magnetic Moments of Rare Earth Ions in a Metallic Environment, in Festkörperproblerne — Advances in Solid State Physics, (Vieweg, Braunschweig), in print.Google Scholar
- 11.M. Croft, I. Zorić, J. Markovics and R. Parks, Proc. Int. Conf. on Valence Instabilities and Related Narrow Band Phenomena, Rochester, N.Y. (1976), in print.Google Scholar
- 12.A. Eichler and J. Wittig, Z. Angew, Physik 25, 319, (1968).Google Scholar
- 13.See also paper by J. Wittig and C. Probst, presented at this conference.Google Scholar