Critical-current density from magnetization loops of finite high-Tcsuperconductors

Comment on “ Critical current density from magnetization hysteresis data using the critical - state model ”

A recent paper [Physical Review B 64 014508 (2001)] claims to present an exact method to extract the critical current density J C from the M-H hysteresis curve. We show that this claim appears unjustified.

High Critical Current Density Superconductivity

This project was focused on a basic scientific problem, one that is at the heart of application and development of superconductivity for efficient energy usage. This is improvement in high current density which can only be achieved by learning to pin vortices to the physical structure of its underlying superconducting material. Quantized vortices are the tornado of electrical supercurrents, ubi...

High Critical Current Density MgB

the effect of traffic density on the accident externality from driving the case study of tehran

در این پژوهش به بررسی اثر افزایش ترافیک بر روی تعداد تصادفات پرداخته شده است. به این منظور 30 تقاطع در شهر تهران بطور تصادفی انتخاب گردید و تعداد تصادفات ماهیانه در این تقاطعات در طول سالهای 89-90 از سازمان کنترل ترافیک شهر تهران استخراج گردید و با استفاده از مدل داده های تابلویی و نرم افزار eviews مدل خطی و درجه دوم تخمین زده شد و در نهایت این نتیجه حاصل شد که تقاطعات پر ترافیک تر تعداد تصادفا...

Vortex plastic flow, local flux density, magnetization hysteresis loops, and critical current, deep in the Bose-glass and Mott-insulator regimes.

We present simulations of flux-gradient-driven superconducting vortices interacting with strong columnar pinning defects as an external field H(t) is quasistatically swept from zero through a matching field Bf . We analyze several measurable quantities, including the local flux density B„x ,y ,H(t)..., magnetization M „H(t)..., critical current Jc„B(t)..., and the individual vortex flow paths. ...