Low-temperature specific heat of icosahedral and amorphous Pd−U−Si alloys View Full Text


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Article Info

DATE

1988-03

AUTHORS

J. Wosnitza, R. van den Berg, H. v. Löhneysen, S. J. Poon

ABSTRACT

Icosahedral (I) Pd0.588U0.206Si0.206 can be obtained from melt-spun amorphous (A) ribbons by annealing. The specific heatC (measured betweenT=0.1 K and 20 K) shows very similar behavior for both phases. The main features ofC are as follows. (i) The vibrational heat capacityCph dominatesC at highT.Cph is almost identical in both phases, in agreement with recent inelastic neutron scattering data. (ii) Shallow maxima in (C−Cph)/T vs.T are found at 5.4 and 4.3 K forI andA phases, respectively, associated with magnetic order. These maxima are suppressed by ≈20% in an applied magnetic field of 6 T. (iii) A large quasi-linear contribution is observed with a low-T coefficient γ=165 mJ/mole U K2 for theI phase and γ=120 mJ/mole U K2 for theA phase. In the low-T region,C is hardly affected by a field of 6 T. This hints at the formation of a narrow 5f band with a comparable density of states for bothI andA phases. More... »

PAGES

31-35

References to SciGraph publications

  • 1978-12. Specific heat of concentrated kondo systems: (La, Ce)Al2 and CeAl2 in ZEITSCHRIFT FÜR PHYSIK B CONDENSED MATTER
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    http://scigraph.springernature.com/pub.10.1007/bf01320535

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    http://dx.doi.org/10.1007/bf01320535

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