Thermally activated flux motion in optimally electron-doped (Ca0.85La0.15)10(Pt3As8)(Fe2As2)5 and Ca10(Pt3As8)((Fe0.92Pt0.08)2As2)5 single crystals
The temperature dependence of the electric resistivity measured in various magnetic fields was analyzed by the vortex glass theory and the thermally activated flux motion (TAFM) theory. The vortex glass-to-vortex liquid (GTL) transition Tg obtained from the analysis shows a temperature dependence of...
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doaj-66652a7e45374df183b4d0bf4ec076032020-12-25T05:08:32ZengElsevierResults in Physics2211-37972020-12-0119103430Thermally activated flux motion in optimally electron-doped (Ca0.85La0.15)10(Pt3As8)(Fe2As2)5 and Ca10(Pt3As8)((Fe0.92Pt0.08)2As2)5 single crystalsW.J. Choi0Y.I. Seo1D. Ahmad2Yong Seung Kwon3Department of Emerging Materials Science, DGIST, Daegu 711-873, Republic of KoreaDepartment of Emerging Materials Science, DGIST, Daegu 711-873, Republic of KoreaDepartment of Emerging Materials Science, DGIST, Daegu 711-873, Republic of KoreaCorresponding author.; Department of Emerging Materials Science, DGIST, Daegu 711-873, Republic of KoreaThe temperature dependence of the electric resistivity measured in various magnetic fields was analyzed by the vortex glass theory and the thermally activated flux motion (TAFM) theory. The vortex glass-to-vortex liquid (GTL) transition Tg obtained from the analysis shows a temperature dependence of BgT=B01-T/Tcm. The vortex liquid region is divided into the critical region existing in a finite temperature region just above Tg and the TAFM region present in the finite temperature region above it. In the critical region, the activation energy is expressed as Ueff=kBTTc-T/(Tc-Tg), whereas in the TAFM region, the activity energy is expressed as temperature-nonlinear UT,B=U0B1-tq. In the GTL transition, (Ca0.85La0.15)10(Pt3As8)(Fe2As2)5 maintains the 3D vortex structure without exhibiting dimension crossover of the vortex, but Ca10(Pt3As8)((Fe0.92Pt0.08)2As2)5 exhibits the dimension crossover from the 3D vortex glass to the 2D vortex liquid.http://www.sciencedirect.com/science/article/pii/S2211379720318969Vortex dynamicsVortex phase diagramThermally activated flux motionVortex glassCritical regionVortex dimensional crossover |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
W.J. Choi Y.I. Seo D. Ahmad Yong Seung Kwon |
spellingShingle |
W.J. Choi Y.I. Seo D. Ahmad Yong Seung Kwon Thermally activated flux motion in optimally electron-doped (Ca0.85La0.15)10(Pt3As8)(Fe2As2)5 and Ca10(Pt3As8)((Fe0.92Pt0.08)2As2)5 single crystals Results in Physics Vortex dynamics Vortex phase diagram Thermally activated flux motion Vortex glass Critical region Vortex dimensional crossover |
author_facet |
W.J. Choi Y.I. Seo D. Ahmad Yong Seung Kwon |
author_sort |
W.J. Choi |
title |
Thermally activated flux motion in optimally electron-doped (Ca0.85La0.15)10(Pt3As8)(Fe2As2)5 and Ca10(Pt3As8)((Fe0.92Pt0.08)2As2)5 single crystals |
title_short |
Thermally activated flux motion in optimally electron-doped (Ca0.85La0.15)10(Pt3As8)(Fe2As2)5 and Ca10(Pt3As8)((Fe0.92Pt0.08)2As2)5 single crystals |
title_full |
Thermally activated flux motion in optimally electron-doped (Ca0.85La0.15)10(Pt3As8)(Fe2As2)5 and Ca10(Pt3As8)((Fe0.92Pt0.08)2As2)5 single crystals |
title_fullStr |
Thermally activated flux motion in optimally electron-doped (Ca0.85La0.15)10(Pt3As8)(Fe2As2)5 and Ca10(Pt3As8)((Fe0.92Pt0.08)2As2)5 single crystals |
title_full_unstemmed |
Thermally activated flux motion in optimally electron-doped (Ca0.85La0.15)10(Pt3As8)(Fe2As2)5 and Ca10(Pt3As8)((Fe0.92Pt0.08)2As2)5 single crystals |
title_sort |
thermally activated flux motion in optimally electron-doped (ca0.85la0.15)10(pt3as8)(fe2as2)5 and ca10(pt3as8)((fe0.92pt0.08)2as2)5 single crystals |
publisher |
Elsevier |
series |
Results in Physics |
issn |
2211-3797 |
publishDate |
2020-12-01 |
description |
The temperature dependence of the electric resistivity measured in various magnetic fields was analyzed by the vortex glass theory and the thermally activated flux motion (TAFM) theory. The vortex glass-to-vortex liquid (GTL) transition Tg obtained from the analysis shows a temperature dependence of BgT=B01-T/Tcm. The vortex liquid region is divided into the critical region existing in a finite temperature region just above Tg and the TAFM region present in the finite temperature region above it. In the critical region, the activation energy is expressed as Ueff=kBTTc-T/(Tc-Tg), whereas in the TAFM region, the activity energy is expressed as temperature-nonlinear UT,B=U0B1-tq. In the GTL transition, (Ca0.85La0.15)10(Pt3As8)(Fe2As2)5 maintains the 3D vortex structure without exhibiting dimension crossover of the vortex, but Ca10(Pt3As8)((Fe0.92Pt0.08)2As2)5 exhibits the dimension crossover from the 3D vortex glass to the 2D vortex liquid. |
topic |
Vortex dynamics Vortex phase diagram Thermally activated flux motion Vortex glass Critical region Vortex dimensional crossover |
url |
http://www.sciencedirect.com/science/article/pii/S2211379720318969 |
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