Anomalous Behavior of the Upper-Critical-Field in Heavy-Fermion Superconductor CeRhSi<sub>3</sub>

Sugawara, Takanori; Kimura, Noriaki; Aoki, Haruyoshi; Lévy, F.; Sheikin, I.; Terashima, Taichi

doi:10.1143/jpsj.79.063701

Cited by 8 publications

(20 citation statements)

References 9 publications

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“…For H k c, similar evolution of the plateau is observed above P 1 . 16) The emergence of the plateau is attributed to the difference between the pressure dependences of the resistivity in the paramagnetic and antiferromagnetic states. As shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

“…16) For H k c, a bend in the H c2 ðT Þ curve appears above P 1 . A transition or crossover line emerges from the bend point into the normal state.…”

Section: Introductionmentioning

confidence: 95%

“…In CeRhSi 3 , for example, H c2 ð0Þ reaches approximately 30 T for fields along the c-axis, while it does not exceed 8 T in the basal plane. 16,17) In addition to exhibiting the characteristic properties in the upper critical field, CeRhSi 3 can provide a good opportunity to investigate the interplay between magnetism and superconductivity since both can be controlled by the application of pressure P. 18,19) At ambient pressure, CeRhSi 3 has antiferromagnetic order below T N ¼ 1:6 K. With increasing P, T N initially increases and then starts to decrease at about 0.9 GPa. Superconductivity appears above about 0.2 GPa and the superconducting transition temperature T c increases with increasing P. T c approaches T N but the antiferromagnetism disappears at about 2.4 GPa ( P 1 ) just before T c coincides with T N .…”

Section: Introductionmentioning

confidence: 99%

“…In our previous paper, we proposed that the anomaly in the resistivity may be due to a different type of antiferromagnetic order from that observed below P 1 and that the superconductivity is suppressed by this magnetism. 16) However, the origin of the anomalous behavior in the resistivity was still unclear.…”

Section: Introductionmentioning

confidence: 99%

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Absence of Quantum Criticality and Presence of Superconducting Fluctuation in Pressure-Induced Heavy-Fermion Superconductor CeRhSi₃

et al. 2012

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We report the pressure dependence of antiferromagnetism and superconductivity in the heavy-fermion CeRhSi 3 on the magnetic field in the tetragonal basal plane. The anomaly of the resistivity at the antiferromagnetic transition changes in behavior with increasing pressure. This is caused by the monotonic reduction of the A coefficient in ðT Þ ¼ 0 þ AT with increasing pressure. The analysis of the pressure dependence of the resistivity strongly indicates that there is no enhancement of spin fluctuation in the vicinity of the pressure at which antiferromagnetism disappears. At the pressures where superconductivity occurs in the antiferromagnetic state, the ac susceptibility shows weak magnetic shielding with a large dissipation energy in the superconducting state. This probably indicates that the superconducting fluctuation is dominant under the magnetic order.

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Section: Methodsmentioning

confidence: 99%

“…16) For H k c, a bend in the H c2 ðT Þ curve appears above P 1 . A transition or crossover line emerges from the bend point into the normal state.…”

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Absence of Quantum Criticality and Presence of Superconducting Fluctuation in Pressure-Induced Heavy-Fermion Superconductor CeRhSi₃

et al. 2012

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“…Moreover, we found a bend in the B c2 (T )-curve, 4) which indicates that distinct superconducting states with different coherence lengths are realized. Althogh the superconductivity of CeRhSi 3 is quite intriguing, the inside of the superconducting state has not been well investigated.…”

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confidence: 73%

Ac-Susceptibility of Heavy-Fermion Superconductor CeRhSi₃under Pressure

2011

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We report the temperature dependence of the zero-field ac-susceptibility of CeRhSi 3 under several pressures. We have observed a clear difference between the onset temperature of superconducting transition T , χ drops and χ peaks sharply as those of conventional superconductors. These results imply that CeRhSi 3 has two different types of pinning state in the superconductivity and the appearance of them is probably associated with the antiferromagnetic state.KEYWORDS: heavy-fermion, noncentrosymmetric superconductor, antiferromagnetism, quantum phase transition, ac-susceptibility, CeRhSi 3After the discovery of the pressure-induced superconductivity in Ce-based heavy-fermion compounds CePd 2 Si 2 and CeIn 3 , 1) the nature of the superconductivity has been attracting growing interest because the superconductivity appears in the vicinity of the magnetic quantum phase transition or quantum critical point, where a long-range magnetic order vanishes. In the heavy-fermion systems, magnetism and superconductivity can be effectively controlled by adjusting the pressure. Therefore, experimental studies on pressure dependence of the superconductivity is a key to reveal the interplay of magnetism and superconductivity. Recently, we have found the noncentrosymmetric heavy-fermion antiferromagnet CeRhSi 3 which shows the superconductivity under pressure.2) The superconductivity emerges above 0.2 GPa and its transition temperature T c increases with increasing pressure P, while the Néel temperature T N initially increases and then turns to decrease above 0.75 GPa. They become almost comparable at about P 1 = 2.4 GPa under zero-field and the antiferromagnetism disappears above this pressure. The superconducting upper-critical-field B c2 (T ) is revealed to be quite anisotropic with respect to the magnetic field direction.3) B c2 (0) for B c-axis probably reaches 30 T although T c only attains 1.1 K. These observations are qualitatively understood in terms of the absence or the strong reduction in the paramagnetic pair-breaking effect which is characteristic of the noncentrosymmetric (Rashba-type) crystal structure. Moreover, we found a bend in the B c2 (T )-curve, 4) which indicates that distinct superconducting states with different coherence lengths are realized. Althogh the superconductivity of CeRhSi 3 is quite intriguing, the inside of the superconducting state has not been well investigated.To clarify the inside of the superconducting state in CeRhSi 3 , we have performed zero-field ac-susceptibility mesurement under several pressures across P 1 . Acsusceptibility mesurement is one of the most useful probes to investigate the inside of the superconducting state.The single crystals of CeRhSi 3 were grown by using Czochralski pulling method in a tetra-arc furnace. They were annealed at 900• C under a vacuum of 2 × 10 −6 Torr for a * E-mail address: t.sugawara@mail.clts.tohoku.ac.jp week and cooled down to room temperature taking a week.To check the sample dependence of the superconductivity, we used four samples cut from ...

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Antiferromagnetism in EuPdGe3

Albedah

Al-Qadi

Stadnik

et al. 2014

Journal of Alloys and Compounds

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Anomalous Behavior of the Upper-Critical-Field in Heavy-Fermion Superconductor CeRhSi₃

Cited by 8 publications

References 9 publications

Absence of Quantum Criticality and Presence of Superconducting Fluctuation in Pressure-Induced Heavy-Fermion Superconductor CeRhSi₃

Absence of Quantum Criticality and Presence of Superconducting Fluctuation in Pressure-Induced Heavy-Fermion Superconductor CeRhSi₃

Ac-Susceptibility of Heavy-Fermion Superconductor CeRhSi₃under Pressure

Antiferromagnetism in EuPdGe3

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Anomalous Behavior of the Upper-Critical-Field in Heavy-Fermion Superconductor CeRhSi3

Cited by 8 publications

References 9 publications

Absence of Quantum Criticality and Presence of Superconducting Fluctuation in Pressure-Induced Heavy-Fermion Superconductor CeRhSi3

Absence of Quantum Criticality and Presence of Superconducting Fluctuation in Pressure-Induced Heavy-Fermion Superconductor CeRhSi3

Ac-Susceptibility of Heavy-Fermion Superconductor CeRhSi3under Pressure

Antiferromagnetism in EuPdGe3

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Product

Resources

About

Anomalous Behavior of the Upper-Critical-Field in Heavy-Fermion Superconductor CeRhSi₃

Absence of Quantum Criticality and Presence of Superconducting Fluctuation in Pressure-Induced Heavy-Fermion Superconductor CeRhSi₃

Absence of Quantum Criticality and Presence of Superconducting Fluctuation in Pressure-Induced Heavy-Fermion Superconductor CeRhSi₃

Ac-Susceptibility of Heavy-Fermion Superconductor CeRhSi₃under Pressure