|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'500'096
Articles rated: 2609
19 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Critical state analysis in MgB2 bulk by means of quantitative MO technique | | L. Gozzelino
; F. Laviano
; D. Botta
; A. Chiodoni
; R. Gerbaldo
; G. Ghigo
; E. Mezzetti
; G. Giunchi
; S. Ceresara
; G.Ripamonti
; M. Poyer
; | | Date: |
4 Apr 2001 | | Subject: | Superconductivity | cond-mat.supr-con | | Affiliation: | INFM-U.d.R To-Politecnico;INFN-Sez.To; Politecnico di Torino,Torino,Italy. Edison S.p.A., Milano, Italy | | Abstract: | An extended magneto-optical (MO) analysis of samples cut from high-density pellets of MgB2 is reported. For sake of comparison some magnetic measurements and critical values are also shown. Notwithstanding the fact that the optical and SEM images exhibit grains with different shape and size, all the samples investigated by MO analysis (three specimens of different shape and size) enter as a whole into a critical state. The current at different temperatures and fields, in a phase zone accessible to MO are calculated by means of a quantitative analysis. The analysis, based on the inversion of the Biot-Savart law, corresponds to three regimes: under-critical, critical and over-critical, respectively. A possible qualitative interpretation of the absence of magnetic granularity is given in the framework of a critical state likely reached by a network of strongly coupled Josephson Junctions. | | Source: | arXiv, cond-mat/0104069 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser claudebot
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER