Peak effect of flux pinning in Sc5Ir4Si10 superconductors

Sun, Yue; Shi, Zhixiang; Gu, Dongmei; Miura, Makoto; Tamegai, T.

doi:10.1063/1.3486467

Cited by 6 publications

(6 citation statements)

References 14 publications

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“…5(b). These narrow peaks at low fields have also been seen in our previous work on Sc5Ir4Si10, [33] where it was ascribed to the surface barrier. In InTe0.9Se0.1, the very asymmetric MHLs shown in Fig.…”

supporting

confidence: 82%

Critical Current Density, Vortex Pinning, and Phase Diagram in the NaCl-Type Superconductors InTe_1–xSe_x (x = 0, 0.1, 0.2)

Song²,

Xing³

et al. 2023

Chinese Phys. Lett.

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Research of vortex properties in type-II superconductors is of great importance for potential applications and fundamental physics. Here, we present a comprehensive study of the critical current density J c, vortex pinning, and phase diagram of NaCl-type InTe1-x Se x (x = 0, 0.1, 0.2) superconductors synthesized by high-pressure technique. Our studies reveal that the values of J c calculated by the Bean model exceed 104 A/cm2 in the InTe1-x Se x system, signifying good potential for applications. The magnetic hysteresis loops (MHLs) show an asymmetric characteristic at various degrees, which is associated with the surface barrier. Intriguingly, a rare phenomenon in which the second magnetization peak in the MHLs occurs only in the field-descending branch is detected in InTe0.9Se0.1. Such an anomalous behavior has not been observed previously and can be described by considering the respective roles of the surface barrier and bulk pinning in the field-ascending and field-descending branches. By analyzing the pinning force density versus reduced field, the pinning mechanisms are studied in detail in the framework of Dew-Hughes model. Finally, combining the results of resistivity and magnetization measurements, the vortex phase diagrams are constructed and discussed.

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confidence: 82%

Critical Current Density, Vortex Pinning, and Phase Diagram in the NaCl-Type Superconductors InTe_1–xSe_x (x = 0, 0.1, 0.2)

Song²,

Xing³

et al. 2023

Chinese Phys. Lett.

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“…Those h locations are almost unchanged with temperatures, and only the peak intensity becomes different. This phenomenon can be found in Sc 5 Ir 4 Si 10 [36] and FeSe 0.91 S 0.09 [37]. Here, the f p peak position shifts gradually with temperature in Fe 1+y Te 0.6 Se 0.4 , excluding the possibility of different pinning mechanisms.…”

Section: Non-scaling Behavior Of Fp Along C Axismentioning

confidence: 54%

Anisotropic critical current density and flux pinning mechanism of Fe 1+y Te_0.6Se_0.4 single crystals

Pan

Zhou

Lin

et al. 2021

Supercond. Sci. Technol.

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Fe 1 + y Te0.6Se0.4 has considerable application potential due to its large critical current density (J c) and high upper critical magnetic field ( H c2 ). However, the uncertainty of the anisotropy of J c and the unclear flux-pinning mechanism have limited the application of this material. In this study, the J c in three directions were obtained from magnetic hysteresis loop measurements. A large anisotropy of J c a b / J c c ∼ 10 was observed, and the origin of the anisotropy was discussed in details. Flux pinning force densities (F p) were obtained from J c, and a non-scaling behavior was found in the normalized pinning force f p [ F p / F p-max ] versus the normalized field h[H/ H c2 ]. The peaks of pinning force shift from a high h to a low h with increasing temperature. Based on the vortex dynamics analysis, the peak shift was found to originate from the magnetization relaxation. The J c and F p at critical states free from the magnetic relaxation were regained. According to the Dew-Hughes model, the dominant pinning type in Fe 1 + y Te0.6Se0.4 clean single crystals was confirmed to be normal point pinning.

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“…Detailed structure and composition analyses have been reported in our previous publication. 13) Temperature dependences of zero-field-cooled (ZFC) and field-cooled based on the BCS theory…”

Section: Resultsmentioning

confidence: 99%

“…25,26) In the case of anisotropic s-wave, Nakai et al 27) theoretically revealed that ( ) H γ shows a crossover from H linear dependence at low field to H at high fields. Thus we replot the 13) together with that from Sc 5 Ir 4 Si 10 single crystal.…”

Section: Resultsmentioning

confidence: 99%

“…Crystal structure were characterized by x-ray diffraction (XRD).Details of the preparation, structure analysis, transport and magnetic properties of the textured sample have been reported previously. 13) Magnetization measurements were performed using a commercial SQUID magnetometer (MPMS-XL5, Quantum Design). Specific heat data were obtained on the same sample under the applied field from 0 to 2 T using the Quantum Design Physical Property Measurement System (PPMS) via the relaxation method.…”

Section: Experimental Methodsmentioning

confidence: 99%

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Specific Heat and Upper Critical Field of Sc₅Ir₄Si₁₀Superconductor

Sun

Ding

et al. 2013

J. Phys. Soc. Jpn.

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Temperature and magnetic field dependent specific heat of textured Sc 5 Ir 4 Si 10 superconductor was investigated in detail. Based on the fitting of zero-field electronic specific heat by different gap structures as well as the discussion on field-induced specific heat coefficient, Sc 5 Ir 4 Si 10 is proved to be an anisotropic s-wave superconductor with a gap anisotropy, min max / Δ Δ , of 0.53. The anisotropy of upper critical field suggests the weakly one-dimensional Fermi surface, and the value is consistent with the gap anisotropy result obtained from the specific heat data.

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Peak effect of flux pinning in Sc5Ir4Si10 superconductors

Cited by 6 publications

References 14 publications

Critical Current Density, Vortex Pinning, and Phase Diagram in the NaCl-Type Superconductors InTe_1–xSe_x (x = 0, 0.1, 0.2)

Critical Current Density, Vortex Pinning, and Phase Diagram in the NaCl-Type Superconductors InTe_1–xSe_x (x = 0, 0.1, 0.2)

Anisotropic critical current density and flux pinning mechanism of Fe 1+y Te_0.6Se_0.4 single crystals

Specific Heat and Upper Critical Field of Sc₅Ir₄Si₁₀Superconductor

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Peak effect of flux pinning in Sc5Ir4Si10 superconductors

Cited by 6 publications

References 14 publications

Critical Current Density, Vortex Pinning, and Phase Diagram in the NaCl-Type Superconductors InTe1–x Se x (x = 0, 0.1, 0.2)

Critical Current Density, Vortex Pinning, and Phase Diagram in the NaCl-Type Superconductors InTe1–x Se x (x = 0, 0.1, 0.2)

Anisotropic critical current density and flux pinning mechanism of Fe 1+y Te0.6Se0.4 single crystals

Specific Heat and Upper Critical Field of Sc5Ir4Si10Superconductor

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Critical Current Density, Vortex Pinning, and Phase Diagram in the NaCl-Type Superconductors InTe_1–xSe_x (x = 0, 0.1, 0.2)

Critical Current Density, Vortex Pinning, and Phase Diagram in the NaCl-Type Superconductors InTe_1–xSe_x (x = 0, 0.1, 0.2)

Anisotropic critical current density and flux pinning mechanism of Fe 1+y Te_0.6Se_0.4 single crystals

Specific Heat and Upper Critical Field of Sc₅Ir₄Si₁₀Superconductor