Large magneto-resistance of high-TC superconductor based composites to low magnetic fields at the liquid nitrogen temperature

2004 ◽  
Vol 408-410 ◽  
pp. 943-944 ◽  
Author(s):  
D.A. Balaev ◽  
K.A. Shaihutdinov ◽  
S.I. Popkov ◽  
D.M. Gokhfeld ◽  
M.I. Petrov
Keyword(s):  
Magnetic Fields ◽  
Liquid Nitrogen ◽  
Liquid Nitrogen Temperature ◽  
High Tc ◽  
High Tc Superconductor ◽  
Magneto Resistance

Preparation of Y-BA-CU Oxide Superconducting Composite Tapes by a Diffusion Process

1987 ◽  
Vol 99 ◽  
Author(s):  
K. Tachikawa ◽  
M. Sugimoto ◽  
N. Sadakata ◽  
O. Kohno
Keyword(s):  
Diffusion Process ◽  
Critical Current ◽  
Liquid Nitrogen ◽  
Liquid Nitrogen Temperature ◽  
Oxide Compound ◽  
High Tc ◽  
Powder Metallurgical Process ◽  
Current Densities ◽  
Wire Fabrication ◽  
Made In

Since discovery of the Y-Ba-Cu oxide compound showing superconductivity above liquid nitrogen temperature, intensive study has been under way to clarify nature of the high Tc oxides[l-4]. Much efforts were also made in the field of superconductor applications. A number of studies have been carried out by a powder metallurgical process of Y-Ba-Cu oxide compound wires, although, obtained critical current densities were still low at liquid nitrogen temperature[5–6]. Other techniques for wire fabrication is also being attempted[7–9]. In this study, Y-Ba-Cu oxide superconducting composite tapes were prepared by a diffusion process, which is one of the promising methods to obtain a high critical current density.

Fabrication and Superconducting Properties of High Tc Oxide Wire

1987 ◽  
Vol 99 ◽  
Author(s):  
N. Sadakata ◽  
Y. Ikeno ◽  
M. Nakagawa ◽  
K. Gotoh ◽  
O. Kohno
Keyword(s):  
Critical Current Density ◽  
Liquid Nitrogen ◽  
Liquid Nitrogen Temperature ◽  
Intrinsic Properties ◽  
Superconducting Properties ◽  
Intensive Study ◽  
High Tc ◽  
Fabrication Procedure ◽  
Paper Fabrication ◽  
Critical Current Density Jc

Since the discovery of high Tc superconducting oxide such as Ln-Ba-Cu-O system which shows superconductivity above liquid nitrogen temperature, intensive study has been carried out to investigate its intrinsic properties[l-4]. Superconducting wire which operates in liquid nitrogen is one of the emerging products among application, however, there are many factors to be investigated for practical use. Critical current density, Jc, is one of the most important characteristics of superconductor, although, only few report describing Jc measurement ever published[5]. In this paper, fabrication procedure of silver sheathed Y-Ba-Cu-O wire by powder metallurgical technique and its superconducting properties have been reported. Other factors which may influence superconductivity such as microstructure of the oxide, configuration of wires, etc. are also discussed.

LOWER CRITICAL MAGNETIC FIELDS OF Y-Ba-Cu-O SUPERCONDUCTOR IN HIGH TEMPERATURE REGION

1987 ◽  
Vol 01 (07n08) ◽  
pp. 309-314 ◽  
Author(s):  
DING SHIYING ◽  
YAN JIALIE ◽  
SHI KEXING ◽  
YU ZHENG ◽  
CHENG JUN ◽  
...  
Keyword(s):  
High Temperature ◽  
Magnetic Fields ◽  
Liquid Nitrogen ◽  
Temperature Region ◽  
Liquid Nitrogen Temperature ◽  
High Temperature Region ◽  
Critical Fields ◽  
Critical Magnetic Fields ◽  
Small Fields

We have measured the magnetizations and determined the dependence of lower critical magnetic fields on temperature for high Tc Y-Ba-Cu-O Superconductor in liquid nitrogen temperature region. The structure examinations and the measurements of virgin magnetization in small fields show that our samples are made up of granules coupled to each other. Therefore the measured lower critical fields are attributed to the values at which flux enters the granulas.

The magnetic field at chromium nuclei in iron and nickel

1976 ◽  
Vol 54 (8) ◽  
pp. 827-829 ◽  
Author(s):  
S. A. Wender ◽  
L. Keszthelyi ◽  
J. A. Cameron
Keyword(s):  
Magnetic Field ◽  
Angular Distribution ◽  
Magnetic Fields ◽  
Liquid Nitrogen ◽  
Liquid Nitrogen Temperature ◽  
Γ Rays ◽  
The Magnetic Field

The integral rotation of the angular distribution of γ rays from the 749 keV level of 51 Cr excited by the (α,n) reaction in Ti5Fe95 and Ti5Ni95 targets has been used to measure the hyperfine magnetic fields at Cr nuclei in these alloys at liquid nitrogen temperature. The values are[Formula: see text]

Suitability of a diamagnetic crystal for the measurement of magnetic fields

1938 ◽  
Vol 34 (4) ◽  
pp. 625-633
Author(s):  
R. G. Stansfield
Keyword(s):  
Magnetic Fields ◽  
Magnetic Anisotropy ◽  
Liquid Nitrogen ◽  
Sodium Nitrate ◽  
Room Temperature ◽  
Liquid Nitrogen Temperature ◽  
Strong Magnetic Fields ◽  
Small Fields

The magnetic anisotropy of crystals of calcite and sodium nitrate does not alter between room temperature and liquid nitrogen temperature. By using such diamagnetic crystals, it is easy to compare strong magnetic fields to 1 part in 1000. The effect is large enough for the measurement of fields of the order of 100 gauss, but in small fields the accuracy is limited by ferromagnetic contamination.

The magnetization properties of high-Tc superconductor YBa2Cu3O∼7 at low magnetic fields

1988 ◽  
Vol 65 (10) ◽  
pp. 1125-1129 ◽  
Author(s):  
H. Zhang ◽  
S.S. Yan ◽  
H. Ma ◽  
J.L. Peng ◽  
Y.X. Sun ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
High Tc ◽  
High Tc Superconductor

AC LOSSES OF BI-2223 MULTIFILAMENTARY TAPES CARRYING AC CURRENT AND EXPOSED TO AC MAGNETIC FIELDS

2003 ◽  
Vol 17 (04n06) ◽  
pp. 966-971
Author(s):  
L. GIANNI ◽  
S. GINOCCHIO ◽  
L. ROGNONI ◽  
S. ZANNELLA ◽  
I. BALDI ◽  
...  
Keyword(s):  
Numerical Model ◽  
Magnetic Fields ◽  
Liquid Nitrogen ◽  
Liquid Nitrogen Temperature ◽  
Operating Conditions ◽  
Ac Losses ◽  
Energy Losses ◽  
Ac Current ◽  
Experimental Values ◽  
Multifilamentary Tapes

For power applications of HTS it is crucial to predict their AC losses in the typical operating conditions. We report measurements of energy losses in Bi-2223 multifilamentary tapes carrying AC currents and exposed to AC magnetic fields oriented perpendicular or parallel to their wide surface. Losses have been evaluated at liquid nitrogen temperature by transport and magnetisation measurements. The results have been compared to the experimental values obtained by calorimetric method the values estimated by a numerical model specifically developed of evaluation of AC losses in HTS tapes.

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