27 August 2017 to 1 September 2017
RAI Congress Center, Amsterdam, The Netherlands
Europe/Amsterdam timezone

Strong flux pinning caused by phase distribution characteristics in (Ba, K)Fe2As2 films

30 Aug 2017, 13:15
1h 45m
Posters Area

Posters Area

Poster Presentation of 1h45m F3 - MgB2 and Iron-based Wires and Cables Wed-Af-Po3.09

Speaker

Prof. Younjung Jo (Kyungpook National University)

Description

We report that the strong flux pinning of (Ba, K)Fe2As2 thin films is induced by the superconducting phase distribution characteristics. Depending on the growth conditions, our thin films have distribution diversity which can induce various superconducting properties. The activation energy is one of the parameters representing pinning forces. We compare the activation energy of two different distributions, which has 16780 K and 5900 K, respectively. The sample of higher activation energy forms a mesh-textured-like distribution which has delta-Tc pinning mechanism while the lower activation energy sample has an intrinsic pinning mechanism. Moreover these distributions are achieved from EPMA elemental mapping which modified by overlay method. We conclude that superconducting phase distribution have strong relation to the flux pinning potential in the (Ba, K)Fe2As2 films.

Submitters Country South Korea

Primary authors

Prof. Younjung Jo (Kyungpook National University) Mr Oh MyeongJun (Kyungpook National University)

Presentation Materials

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