Physics – Condensed Matter – Superconductivity
Scientific paper
2002-10-17
Supercond. Sci. Technol. 16 (2003) 668-671
Physics
Condensed Matter
Superconductivity
Scientific paper
10.1088/0953-2048/16/6/302
We report here on a new heat treatment to prepare both dense polycrystalline and single crystal MgB2 high quality samples in one single process. Resistivity measurements for polycrystalline part of the sample gives a residual resistivity ratio RRR=16.6 and a very low normal state resistivity rho(40K)= 0.28 microOhmcm. Both SEM and SQUID study on polycrystals reveal the high quality, dense character and well coupling of grain boundaries. On the other hand, the high quality single crystals have a unique shape that resembles the hexagonal crystal structure. SQUID measurements reveals very weak flux pinning character implying our single crystals to be very clean. In this study, we conclude that heat treatment is playing a major rule on the characteristics of both polycrystalline and single crystal MgB2. Samples are thoroughly characterized by x-ray, resistivity, dc SQUID and SEM.
Badr Mohamed H.
Ng Kin-Wang
No associations
LandOfFree
New heat treatment to prepare high quality polycrystalline and single crystal MgB2 in single process does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with New heat treatment to prepare high quality polycrystalline and single crystal MgB2 in single process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and New heat treatment to prepare high quality polycrystalline and single crystal MgB2 in single process will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-671422