First-principles study of structural and mechanical properties of AgB2 and AuB2 compounds under pressure

Currently, superconductivity in two-dimensional (2D) materials is a hot topic of research owing to their enormous potential applications. We have observed peculiar magnetic meissner effect in 2D Nb2C MXene leading to signatures of superconductivity in the material with an onset transition temperature of 12.5 K. Systematically optimized chemical etching process of bulk Nb2AlC MAX phase led to the formation of 2D Nb2C MXene as confirmed using scanning electron microscope (SEM) and X-ray diffraction (XRD) indicating a significant increase in the c-lattice parameter from 13.83A to 22.72A. The Meissner effect and its unusual magnetic nature is observed using superconducting quantum interference device (SQUID: Quantum Design). Fittings of experimentally obtained lower and upper critical fields as a function of temperature to the Ginzburg-Landau (GL) theory confirms possibility of presence of type-II superconductivity in our Nb2C samples. This peculiar magnetic behaviour, observed in as-synthesized Nb2C MXene in powder form is intrinsic property of our sample. It is to be noted that we have tried to measure the transport properties of our sample but due to its powdered nature, this was not possible. We insist that this work is a significant advancement in the field of magnetism and superconductivity in 2D MXene which may be explored further to determine superconductivity by measuring the transport properties in future.

Peculiar magnetic behaviour and Meissner effect in two-dimensional layered Nb2C MXene

Dc magnetization studies were carried out on a polycrystalline MgB2 superconductor, which was synthesized at 750°C in Fe tube encapsulation under a vacuum of 10−5Torr. Zero resistances at H=0 and 8T are obtained at 38 and 22K, respectively. The material possesses a sharp diamagnetic transition in the zero-field-cooled branch, whereas the field-cooled branch exhibits the paramagnetic-Meissner-effect-like phenomenon below Tc, indicating strong pinning in this compound. The critical current density at 20K and 2T, estimated by the Bean model is higher than 105A∕cm2. Due to the strong pinning, we observed the presence of flux avalanches below H=2T at temperatures below 20K. The magnetization M(H) grows (as usual) slowly with H and falls sharply to near zero moment value, and further grows again in a common way. The flux avalanches were seen quite symmetric in both increasing∕decreasing the field in all four quadrants of the M(H) loops. The dynamics behavior of sinusoidal-like symmetric reproducible flux avalan...

Avalanche of flux jumps in polycrystalline MgB2 superconductor

We investigated the influence of reactivity of commonly used sheath materials (Fe, SS, Cu, and Ni) with Mg/B, processed by in situ powder in sealed tube method on superconducting properties of MgB2. X-ray diffraction characterization of samples yields quantitative data of the volume fraction of MgB2 core, whereas magnetic measurements show the influence of added sheath materials on TC , JC(H), Hirr, and flux pinning behavior of MgB2. Our comparative study gives better phase purity, JC(H) characteristics, and flux pinning behavior for Fe and SS added samples, which shows the suitability of Fe and SS as sheath materials in MgB2 wire/tape fabrication.

Influence of reactivity of sheath materials with Mg/B on superconducting properties of MgB2

Physical property characterization of bulk MgB2 superconductor

Measurements have been performed on the resistivity of samples MgB2, AlB2 and AgB2. The samples show presence of impurities. By analyzing the data in terms of impurity scattering, electron-phonon scattering, and weak localization, it has been found that the AlB2 (AgB2) sample involves maximum (minimum) effect of the impurity, electron-phonon interaction and weak localization.

A COMPARISON OF THE RESISTIVITY BEHAVIOR OF MgB2, AlB2 AND AgB2 SYSTEMS

Samples of series Bi1.6Pb0.4Sr2Ca2Cu3-xZnxO10-δ with x = 0.0, 0.015, 0.03, 0.06, 0.09 and 0.12 are synthesized by solid-state reaction route. All the samples crystallize in tetragonal structure with majority (> 90%) of Bi-2223(Bi2Sr2Ca2Cu3O10) phase (c-lattice parameter ~ 36 A). The proportion of Bi-2223 phase decreases slightly with an increase in x. The lattice parameters a and c of main phase (Bi-2223) do not change significantly with increasing x. Superconducting critical transition temperature (Tc) decreases with x as evidenced by both resistivity [ρ(T)] and ac magnetic susceptibility [χ(T)] measurements. Interestingly the decrement of Tc is not monotonic and the same saturates at around 96 K for x > 0.06. In fact Tc decreases fast (~ 10 K/at%) for x = 0.015 and 0.03 samples and later nearly saturates for higher x values. Present results of Zn doping in Bi-2223 system are compared with other Zn-doped HTSC (high temperature superconducting) systems, namely the RE-123 (REBa2Cu3O7) and La-214 ((La, Sr)2CuO4).

IMPACT OF Zn SUBSTITUTION ON PHASE FORMATION AND SUPERCONDUCTIVITY OF Bi1.6Pb0.4Sr2Ca2Cu3-xZnxO10-δ WITH x = 0.0, 0.015, 0.03, 0.06, 0.09 AND 0.12

http://arxiv.org/pdf/cond-mat/0605689.pdf

Physical property characterization of Fe-tube encapsulated and vacuum annealed bulk MgB2

Measurements have been performed of the resistivity of the samples of MgB2, AlB2 and AgB2. The samples show presence of impurities. Analyzing the data in terms of the impurity scattering, electron-phonon scattering, and weak localization it has been found that the AlB2 (AgB2) sample involves maximum (minimum) effect of the impurity, electron-phonon interaction and weak localization.

https://arxiv.org/pdf/cond-mat/0509674.pdf

A comparison of the resistivity behavior of MgB2, AlB2 and AgB2 systems

Handle everyday research tasks with reliable, citation-backed results

Your personal Research Agent to handle research tasks with citation-backed results

Popular Tasks used by Researchers

How can I help with your research?

Meet SciSpace

Get more enhanced response by uploading the PDFs you want me to reference.

No relevant PDFs in your library

SciSpace is the AI research assistant for academics. Run systematic literature reviews on 280M+ papers, and write papers with cited sources. Trusted by 1M+ students, PhDs & researchers.

SciSpace | AI for Research

Analyze PDFs

Code & Manuscripts

Funding & Grants

Literature & Patents

Medical & Clinical Data

Systematic Review

Visualize & Present

Web & Data

Build a Google Scholar-like website for your research.

Build a website

Create charts and images for your research

Create a Chart

Write a paper for submission to a journal

Draft a manuscript

Patent Search

Design eye-catching scientific posters in minutes.

Scientific Poster Generation

Systematic Literature Review

One task is running at the moment. Your messages will be shown right after.

Drag and drop or click here to browse

Loved by <highlight>1 million+</highlight> researchers

Extract a list of specific topics and their sources from unstructured text

Topics

Compare and analyze relevant papers that matches with your search

Papers

Get insights from PDFs and bookmarked papers from your library

My library

Recent searches

Try searching for:

Catch AI-generated content in scholarly and non-scholarly content

{ai} Detector

Ai Writer

Get PDF Summaries, highlighted text explanations 

Chat with PDF

Effortlessly create in-text citations and bibliographies in APA and 2,500 other formats

Citation generator

Get explanations, summaries, and answers on academic papers

Ease up your research workflow with {scispace}'s cohort of exciting AI tools

Elevate your academic writing skills and convey your ideas the way you want

Paraphraser

Explore our range of reading and writing tools

Your file is being prepared and should be ready in a few minutes. If it's a large file, it might take a bit longer. You can close this window, and we'll email you the file when it's done.

You have reached a maximum limit of <strong>{limit}</strong> columns in the table. Remove at least <strong>1</strong> column to add or create another one.

K. P. Singh

Author Tools

Chat about Author

Papers

A COMPARISON OF THE RESISTIVITY BEHAVIOR OF MgB2, AlB2 AND AgB2 SYSTEMS

IMPACT OF Zn SUBSTITUTION ON PHASE FORMATION AND SUPERCONDUCTIVITY OF Bi1.6Pb0.4Sr2Ca2Cu3-xZnxO10-δ WITH x = 0.0, 0.015, 0.03, 0.06, 0.09 AND 0.12

Physical property characterization of Fe-tube encapsulated and vacuum annealed bulk MgB2

A comparison of the resistivity behavior of MgB2, AlB2 and AgB2 systems