Density effect on critical current density and flux pinning properties of polycrystalline SmFeAsO1-xFx superconductor

Details Density effect on critical current density and flux pinning properties of polycrystalline SmFeAsO1-xFx superconductor Density effect on critical current density and flux pinning properties of polycrystalline SmFeAsO1-xFx superconductor

2011-10-20

arxiv.org/abs/1110.4532v2

Physics

Condensed Matter

Superconductivity

23 pages, 8 figures, 1 table

Scientific paper

A series of polycrystalline SmFeAs1-xOx bulks was prepared to systematically investigate the influence of sample density on flux pinning properties. Different sample densities were achieved by controlling the pelletizing pressure. The superconducting volume fraction, the critical current densities Jcm and the flux pinning force densities Fp were estimated from the magnetization measurements. Experimental results manifest that: (1) the superconducting volume fraction decreases with the decreasing of sample density. (2) The Jcm values have the similar trend except for the sample with very high density may due to different connectivity and pinning mechanism. Moreover, The Jcm(B) curve develops a peak effect at approximately the same field at which the high-density sample shows a kink. (3) The Fp(B) curve of the high-density sample shows a low-field peak and a high-field peak at several temperatures, which can be explained by improved intergranular current, while only one peak can be observed in Fp(B) of the low-density samples. Based on the scaling behaviour of flux pinning force densities, the main intragranular pinning is normal point pinning.

Affiliated with

Also associated with

No associations

Rating

Density effect on critical current density and flux pinning properties of polycrystalline SmFeAsO1-xFx superconductor 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 Density effect on critical current density and flux pinning properties of polycrystalline SmFeAsO1-xFx superconductor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Density effect on critical current density and flux pinning properties of polycrystalline SmFeAsO1-xFx superconductor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-551814