Detection of the flux dynamical regimes in Bi 4 O 4 S 3 by multiharmonic AC susceptibility

Mancusi, D; Giubileo, Filippo; Mizuguchi, Yoshikazu; Pace, S.; Polichetti, Massimiliano

doi:10.1016/j.physc.2014.10.002

Cited by 2 publications

(1 citation statement)

References 56 publications

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“…In fact, when µ 0 H DC ̸ = 0 T, we have to use an exponential law U ∝ exp (−H AC ), as reported in the inset of figure 5 with a blue dotted line, that well describes our experimental data. It is worth to underline that the U values obtained are very high if compared with other sample types and other Fe-based materials [62][63][64][65][66][67][68][69][70] showing that the sample that we are investigating has a perfect combination of weak and strong pinning centers (twin boundaries) that allows to achieve a vortex and crystal structure stability not easy to obtain. So, the study of this kind of good balanced samples becomes fundamental to fabricate high power or electronic devices whose performances are affected by the vortex dynamics.…”

Section: Resultsmentioning

confidence: 87%

Mixed state properties analysis in AC magnetic field of strong pinning Fe(Se,Te) single crystal

Galluzzi¹,

Buchkov²,

Tomov³

et al. 2020

Supercond. Sci. Technol.

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The fundamental harmonic of the AC magnetic susceptibility of a Fe(Se,Te) single crystal iron based superconductor has been studied at different AC field amplitudes and frequencies with and without a superimposed DC magnetic field with the aim of analyzing its superconducting properties that can be also suitable for power applications such as the critical current density and the pinning energy in AC regime. From the analysis of the fundamental Cole-Cole plots a finite influence of flux creep phenomena has been detected. Its study, by means of the Arrhenius plots, evidences thermal activation energy U values as high as 10 3 K, whose dependence on the DC and AC fields, and of the temperature, has been also obtained. The magnetic field dependence shows the existence of the strong pinning regime characterized by plastic deformations of the vortex lattice, whereas the temperature dependence of the critical current density J c (T) is consistent with the δl pinning model. Finally, the irreversibility field values H irr (T) have been extracted from the J c (T) at the different AC frequencies showing very high values if compared with the literature.

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Section: Resultsmentioning

confidence: 87%

Mixed state properties analysis in AC magnetic field of strong pinning Fe(Se,Te) single crystal

Galluzzi¹,

Buchkov²,

Tomov³

et al. 2020

Supercond. Sci. Technol.

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Material Development and Physical Properties of BiS₂-Based Layered Compounds

Mizuguchi

2019

J. Phys. Soc. Jpn.

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In 2012, we discovered superconductivity in Bi 4 O 4 S 3 and LaO 1-x F x BiS 2 , whose crystal structures are composed of alternate stacks of a BiS 2 -type conduction layer and a blocking layer. Since the discovery, many related superconductors and functional materials have been synthesized. Furthermore, the possibility of unconventional superconductivity has been proposed in recent theoretical and experimental studies. In addition, notable correlations between local structure and physical properties have been revealed in the BiS 2 -based systems. In this review article, we summarize the material development (probably all the compounds) and physical properties of BiS 2 -related materials developed in the last six years. The key parameters for the emergence of bulk superconductivity in the BiS 2 -based compounds are carrier doping to the parent phase (band insulator), pressure-induced structural transition, in-plane chemical pressure, and the suppression of in-plane disorder. We systematically review those parameters and the method of designing new superconductors with BiS 2 layers. In addition, studies of BiS 2 -based compounds as thermoelectric materials are briefly reviewed.Recently, the various functionalities of thermoelectric, photocatalytic, and spintronics materials have been observed (or predicted) for layered chalcogenides related to the BiS 2 -based superconductors. Therefore, for the further development of the layered metal chalcogenide family as high-T c and unconventional superconductors or promising functional materials, understanding the crystal structure and physical properties is crucial.In this review article, we summarize the material development of the BiS 2 -related layered compounds and their physical and chemical properties. First, material information from Refs. 12-219, categorized into properties shown in the paper, is summarized in Table I. On the basis of the table, the essence of the structural variation and the physical properties is described. Furthermore, we try to systematically clarify the physical and chemical parameters essential for the emergence of 18, 19, 89, 90, 91, 92, 94, 103, 105, 108, 109, 110, 154, 170 154, 161, 170, 207 La(O,F)BiS 2 3( AP) 11 (HP) 11.5 (HPA)

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Detection of the flux dynamical regimes in Bi 4 O 4 S 3 by multiharmonic AC susceptibility

Cited by 2 publications

References 56 publications

Mixed state properties analysis in AC magnetic field of strong pinning Fe(Se,Te) single crystal

Mixed state properties analysis in AC magnetic field of strong pinning Fe(Se,Te) single crystal

Material Development and Physical Properties of BiS₂-Based Layered Compounds

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Detection of the flux dynamical regimes in Bi 4 O 4 S 3 by multiharmonic AC susceptibility

Cited by 2 publications

References 56 publications

Mixed state properties analysis in AC magnetic field of strong pinning Fe(Se,Te) single crystal

Mixed state properties analysis in AC magnetic field of strong pinning Fe(Se,Te) single crystal

Material Development and Physical Properties of BiS2-Based Layered Compounds

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Material Development and Physical Properties of BiS₂-Based Layered Compounds