Title :
Superconducting Properties of Aromatic Hydrocarbon-Added Powder-in-Tube MgB2/Fe Tapes
Author :
Yamada, H. ; Uchiyama, N. ; Kumakura, H. ; Kitaguchi, H. ; Matsumoto, A.
Author_Institution :
Central Japan Railway Co., Komaki
fDate :
6/1/2007 12:00:00 AM
Abstract :
We investigated the superconducting properties of aromatic hydrocarbon added in situ-processed powder-in-tube (PIT) MgB2/Fe tapes. We used aromatic hydrocarbons such as benzene, naphthalene, thiophene, ethyltoluene, toluene and xylene. We found that these aromatic hydrocarbons were very effective for increasing the Jc values. X-ray diffraction analyses suggest that the substitution of carbon for boron occurred in these tapes. The Jc values of 20 mol% benzene-added tapes reached 130 A/mm2 at 4.2 K and 10 T. This value was almost comparable to that of 10 mol% SiC-added tapes. The 10 mol% ethyltoluene-added tape showed a Jc of 390 at A/mm2 4.2 K and 8 T. This value is higher than that of the 10 mol% SiC-added tape.
Keywords :
X-ray diffraction; critical current density (superconductivity); iron; magnesium compounds; organic compounds; superconducting tapes; type II superconductors; MgB2-Fe - Interface; X-ray diffraction; aromatic hydrocarbons; benzene; critical current density; ethyltoluene; magnetic flux density 8 T; naphthalene; powder-in-tube MgB2/Fe tapes; superconducting properties; temperature 4.2 K; thiophene; toluene; xylene; Boron; Fabrication; Hydrocarbons; Iron; Magnetic fields; Powders; Silicon carbide; Superconducting filaments and wires; Superconducting films; Superconducting transition temperature; in situ-process; ${rm MgB}_{2}$; Aromatic hydrocarbon; critical current; powder-in-tube;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2007.898952
