Abstract
The low-temperature microscopic magnetic properties of the quasi-2D heavy- fermion compound, CePt2In7 are investigated by using a positive muon-spin rotation and relaxation (μ+SR) technique. Clear evidence for the formation of a commensurate antiferromagnetic order below TN ≈ 5.40 K is presented. The magnetic order parameter is shown to fit well to a modified BCS gap-energy function in a strong-coupling scenario.
Highlights
IntroductionNuclear quadrupolar resonance (NQR) studies have indicated that the AF structure could be both commensurate [7] as well as incommensurate [9], the details of which are strongly dependent on how the polycrystalline or single crystalline samples were prepared
CePt2In7 is a recently discovered heavy fermion material belonging to the same family as the rather famous CeIn3 [1] and CeM In5 (M = Co, Rh, Ir) [2, 3] compounds
Nuclear quadrupolar resonance (NQR) studies have indicated that the AF structure could be both commensurate [7] as well as incommensurate [9], the details of which are strongly dependent on how the polycrystalline or single crystalline samples were prepared
Summary
Nuclear quadrupolar resonance (NQR) studies have indicated that the AF structure could be both commensurate [7] as well as incommensurate [9], the details of which are strongly dependent on how the polycrystalline or single crystalline samples were prepared This suggests that strain may affect the magnetic properties of CePt2In7. Electrical resistivity and ac-calorimetry measurements under pressure were recently carried out on single crystals of CePt2In7 [10] These experiments reveal a quantum critical point at a critical pressure Pc ≈ 3.2 GPa where the AF order is completely suppressed, in which the electrical resistivity exhibits a powerlaw T -dependence near Pc. In addition, a narrow dome of superconductivity is observed around Pc, suggesting that critical AF fluctuations may mediate the Cooper pairing. NMR/NQR measurements under pressure on single crystals [12] reveal that a localized-itinerant crossover of the Ce-4f electron occurs within the AF state at P ∗ ≈ 2.5 GPa, approximately the pressure where superconductivity first emerges
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
