✦ LIBER ✦

Standard reference devices for high temperature superconductor critical current measurements

✍ Scribed by L.F. Goodrich; A.N. Srivastava; T.C. Stauffer

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 713 KB
Volume: 33
Category: Article
ISSN: 0011-2275
DOI: 10.1016/0011-2275(93)90008-c

No coin nor oath required. For personal study only.

✦ Synopsis

Obtaining repeatable critical current measurements for a high temperature superconductor (HTS) is a challenging task, since HTSs are highly susceptible to degradation due to mechanical stress, moisture, thermal cycling and aging. This paper discusses the development of a high temperature superconducting standard reference device (SRD) to address these measurement concerns and gives preliminary data on its characteristics. An SRD is an HTS specimen that has had its critical current / c non-destructively evaluated. Because HTSs are sensitive to mechanical alterations, minor changes in sample preparation or mounting procedure could yield large changes in the measured critical current. Preliminary data on SRDs made using Bi-based oxide tapes ( ) with an Ag substrate are presented. Differences between two consecutive measurements of / c can typically change by 40%; these deviations have been reduced to ~ 4%.

📜 SIMILAR VOLUMES

Apparatus for critical current measureme

Apparatus for critical current measurement of high current superconductors

✍ L.S. Shirshov; G. Enderlein 📂 Article 📅 1985 🏛 Elsevier Science 🌐 English ⚖ 180 KB

he hlled h> 2(l()() i'~'.,i ( 1 ' ~ 7N MPa) (\_ia'~ taken Ir~)m ,me (~l thence b~Hile~, wan ~Lih,,equeIHl~,' pa,~sed ihr¢~uj/,h a TTIilII;.! lure IHe/4 HI.' I",IHL)pIL' L'()i|~.'enlralli\_)[l cr¥o'.,lal ~ lhai WOl.ihJ have inL'rea.'.;ed IIN 'He/'IHe rall~l l',V a lacl~r ~I ,-I ~,() II w'a.~ h~urld +

Critical current calculations in high te

Critical current calculations in high temperature superconductors from levitation force measurements

✍ T Gazinszky; J Bánkuti 📂 Article 📅 1997 🏛 Elsevier Science 🌐 English ⚖ 176 KB

The critical current density in high temperature superconductor grains were taken from magnetic levitation data. The nature of this current is given by the critical state model and calculations were made for different models, supposing field dependence. The regimes in which the critical state is val

Scaling law for critical currents and ma

Scaling law for critical currents and magnetization in high temperature superconductors

✍ H.W. Neumüller; G. Ries; J. Bock; E. Preisler 📂 Article 📅 1990 🏛 Elsevier Science 🌐 English ⚖ 388 KB

The field and temperature dependent critical current density, jc(B, T), and magnetization, M(B, T), of melt processed Bi2Sr2CaCu208 samples have been examined in fields up to 8 T. In addition, published data on an epitaxially grown YBa2Cu307 film have been analysed. Both sources of information show

Simple device for measurement of transpo

Simple device for measurement of transport properties of new high temperature superconductors

✍ P. Svoboda 📂 Article 📅 1989 🏛 Elsevier Science 🌐 English ⚖ 191 KB

A simple device provides all necessary experimental conditions for an investigation of transport properties of new superconductors of types La-Ba-Cu-O or Y-Ba-Cu-O in both their normal and superconducting states.