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Continentino, M. A.; Medeiros, S.N. de; Orlando, M. T. D.; Fontes, M. B.; Baggio‐Saitovitch, E.

doi:10.1103/physrevb.64.012404

Cited by 80 publications

(55 citation statements)

References 5 publications

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“…Previously, for CePt 3 B the magnetic specific heat contribution at low temperatures (in the antiferromagnetic state) was described in terms of spin wave excitations following the model of Continentino et al 37 ,…”

Section: Resultsmentioning

confidence: 99%

Magnetic phase diagram of CePt3B1−xSix

et al. 2012

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We present a study of the main bulk properties (susceptibility, magnetization, resistivity and specific heat) of CePt3B1−xSix, an alloying system that crystallizes in a noncentrosymmetric lattice, and derive the magnetic phase diagram. The materials at the end point of the alloying series have previously been studied, with CePt3B established as a material with two different magnetic phases at low temperatures (antiferromagnetic below TN = 7.8 K, weakly ferromagnetic below TC ≈ 5 K), while CePt3Si is a heavy fermion superconductor (Tc = 0.75 K) coexisting with antiferromagnetism (TN = 2.2 K). From our experiments we conclude that the magnetic phase diagram is divided into two regions. In the region of low Si content (up to x ∼ 0.7) the material properties resemble those of CePt3B. Upon increasing the Si concentration further the magnetic ground state continuously transforms into that of CePt3Si. In essence, we argue that CePt3B can be understood as a low pressure variant of CePt3Si.

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Section: Resultsmentioning

confidence: 99%

Magnetic phase diagram of CePt3B1−xSix

et al. 2012

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“…An interesting line of study on quantum criticality in metals has been to investigate the changes in the nature of the elementary excitations of the long range ordered magnetic phase, below the critical line, as the QCP is approached from the left [45] (see Fig. 1).…”

Section: Prospectsmentioning

confidence: 99%

“…One way of probing these excitations is through the electrical resistivity since they scatter the conduction electrons. Then the transport measurements allow to accompany the changes in the spin-wave parameters as the distance |g| to the QCP is reduced, for example, by applying pressure on the material [45].…”

Section: Prospectsmentioning

confidence: 99%

Quantum critical point in heavy fermions

Continentino¹

2005

Braz. J. Phys.

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The concept that heavy fermions are close to a quantum critical point and that this proximity determines their physical behavior has opened new perspectives in the study of these systems. It has provided a new paradigm for understanding and probing the properties of these strongly correlated materials. Scaling ideas were important to establish this approach. We give below a brief and personal account of the genesis of some of these ideas 15 years ago, their implications and the future prospects for this exciting field.

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“…(3) and (4) is the constant Γ which turns out from the fit to be, Γ/k B = 14.2 K (CePt) and Γ/k B = 2.42 K (YbFe 2 Ge 2 ), values comparable with Γ values for other HFs with magnetic-QCP transitions. 35) As shown in Fig. 3, the critical line T N/C (P ) is reproduced even far from the QCP.…”

Section: )mentioning

confidence: 64%

Quantum Criticality of CePt and YbFe₂Ge₂Heavy Fermions under Pressure

Fontes

Baggio-Saitovitch

et al. 2007

J. Phys. Soc. Jpn.

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This work reports the study of the quantum criticality of the ferromagnetic (FM) CePt Kondo lattice and the new non-magnetic YbFe2Ge2 heavy fermion compound using electrical resistivity measurements under high pressures (P ≤ 20 GPa). Pressure drives these systems to different types of magnetic quantum critical point, at different critical pressures (Pc): FM-QCP for CePt (Pc ∼12.1 GPa) and AF-QCP YbFe2Ge2 (Pc ∼9.4 GPa). Despite of that, the quantum critical behavior of both compounds at the two sides of the zero temperature transition is dominated by two dimensional (2D) spin fluctuations.

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Anisotropic quantum critical behavior inCeCoGe3−xSix

Cited by 80 publications

References 5 publications

Magnetic phase diagram of CePt3B1−xSix

Magnetic phase diagram of CePt3B1−xSix

Quantum critical point in heavy fermions

Quantum Criticality of CePt and YbFe₂Ge₂Heavy Fermions under Pressure

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Anisotropic quantum critical behavior inCeCoGe3−xSix

Cited by 80 publications

References 5 publications

Magnetic phase diagram of CePt3B1−xSix

Magnetic phase diagram of CePt3B1−xSix

Quantum critical point in heavy fermions

Quantum Criticality of CePt and YbFe2Ge2Heavy Fermions under Pressure

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Product

Resources

About

Quantum Criticality of CePt and YbFe₂Ge₂Heavy Fermions under Pressure