Normal and Superconducting State Properties of Doped CePt3Si

Kim, J. S.; Mixson, D. J.; Burnette, D.; Stewart, G. R.

doi:10.1007/s10909-007-9304-2

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…In Figure 11 we have collected the low-temperature S m (T ) [73] is included to confirm that this limit is related to thermodynamic properties independently of lattice configuration. Other Ce diluted systems, like (Ce 1Àx La x )Pt 3 Si [77], also exhibit similar high values for 0.8 x 0.95. As can be seen, all experimental results show a sort of envelope curve described by the S m (T ) dependence of CePd 3 B [71].…”

Section: Thermal Expansionmentioning

confidence: 75%

Thermodynamic analysis of the quantum critical behavior of Ce-lattice compounds

Sereni

2013

Philosophical Magazine

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A systematic analysis of low-temperature magnetic phase diagrams of Ce compounds is performed in order to recognize the thermodynamic conditions to be fulfilled by those systems to reach a quantum critical regime or, alternatively, to identify other kinds of low-temperature behavior. Based on specific heat (C m ) and entropy results, three different types of phase diagrams are recognized: (i) with the entropy involved in the ordered phase (S MO ) decreasing proportionally to the ordering temperature (T MO ); (ii) those showing a transference of degrees of freedom from the ordered phase to a non-magnetic component, with their C m (T MO ) jumps (DC m ) vanishing at finite temperature; and (iii) those ending at a critical point at finite temperature because their DC m do not decrease sufficiently with T MO , producing an entropy accumulation at low temperature.Only those systems belonging to the first case, i.e. with S MO ! 0 as T MO ! 0, can be regarded as candidates for quantum critical behavior. Their magnetic phase boundaries deviate from the classical negative curvature below T % 2.5 K, denouncing monotonic misleading extrapolations down to T ¼ 0. Different characteristic concentrations are recognized and analyzed for Ce-ligand alloyed systems. In particular, a pre-critical region is identified where the nature of the magnetic transition undergoes significant modifications, with its @C m /@T discontinuity strongly affected by the magnetic field and showing an increasing remnant entropy at T ! 0. Physical constraints arising from the third law at T ! 0 are discussed and recognized from experimental results.

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Section: Thermal Expansionmentioning

confidence: 75%

Thermodynamic analysis of the quantum critical behavior of Ce-lattice compounds

Sereni

2013

Philosophical Magazine

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“…These samples are usually annealed under high vacuum around 900 • C for 2-3 weeks. Interestingly, the annealing process has been linked to a Si excess [7]. Growing very high quality single crystals of CePt 3 Si has taken a long path that has led to the resolution of most of the problems in identifying the true superconducting properties of this compound.…”

Section: Crystal Structure Sample Growth and Characteristic Parametersmentioning

confidence: 99%

Non-centrosymmetric Heavy-Fermion Superconductors

Kimura

Bonalde

2012

Non-Centrosymmetric Superconductors

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In this chapter we discuss the physical properties of a particular family of non-centrosymmetric superconductors belonging to the class heavy-fermion compounds. This group includes the ferromagnet UIr and the antiferromagnets CeRhSi 3 , CeIrSi 3 , CeCoGe 3 , CeIrGe 3 and CePt 3 Si, of which all but CePt 3 Si become superconducting only under pressure. Each of these superconductors has intriguing and interesting properties. We first analyze CePt 3 Si, then review CeRhSi 3 , CeIrSi 3 , CeCoGe 3 and CeIrGe 3 , which are very similar to each other in their magnetic and electrical properties, and finally discuss UIr. For each material we discuss the crystal structure, magnetic order, occurrence of superconductivity, phase diagram, characteristic parameters, superconducting properties and pairing states. We present an overview of the similarities and differences between all these six compounds at the end. CePt 3 SiThe enormous interest in superconductors without inversion symmetry started with the discovery of superconductivity in the heavy-fermion compound CePt 3 Si [1], which exhibits long-range antiferromagnetic (AFM) order below the Neel temperature T N = 2.2 K and becomes superconducting at the critical temperature T c = 0.75 K. CePt 3 Si is the only known heavy-fermion (HF) compound without inversion symmetry that superconducts at ambient pressure, as opposed to the cases of CeIrSi 3 , CeRhSi 3 , CeCoGe 3 , CeIrGe 3 and UIr. The heavy-fermion character has

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