Vortex phase diagram in 1111-type CaFe0.89Co0.11AsF single crystal

Abstract Studying the vortex properties in high-Tc superconductors is crucial for understanding the high temperature superconducting mechanism. However, until now, only few vortex studies have been performed in 1111-type iron-based superconductors due to their smaller-sized single crystals. In this study, we have synthesized the millimeter-sized CaFe0.89Co0.11AsF single crystals by self-ﬂux method. Three dimensional vortex nature was conﬁrmed in the thermally activated ﬂux ﬂow region. Second magnetization peak was observed on the isothermal magnetization curves. Meanwhile, the dominated role of the normal point pinning was also conﬁrmed. Finally, the various phase boundaries of the vortex were determined based on the analysis of the resistivity and magnetization data, and a complete vortex phase diagram of CaFe0.89Co0.11AsF single crystals was established.

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ANISOTROPIC VORTEX DYNAMICS AND PHASE DIAGRAM OF YBa2Cu3O7 SINGLE CRYSTALS WITH CANTED COLUMNAR DEFECTS

International Journal of Modern Physics B ◽

10.1142/s0217979296001215 ◽

1996 ◽

Vol 10 (22) ◽

pp. 2723-2743 ◽

Cited By ~ 10

Author(s):

D. S. REED ◽

N.-C. YEH ◽

W. JIANG ◽

U. KRIPLANI ◽

M. KONCZYKOWSKI ◽

...

Keyword(s):

Phase Diagram ◽

Magnetic Fields ◽

Vortex Dynamics ◽

Flow Model ◽

Flux Flow ◽

Thermally Activated ◽

Liquid Transition ◽

Columnar Defects ◽

Thermally Activated Flux Flow ◽

Activated Flux

The anisotropic vortex dynamics and phase diagram are determined for a YBa 2 Cu 3 O 7 single crystal with columnar defects oriented at ±7.5° relative to the crystalline c-axis. A second-order splayed-glass to vortex-liquid transition is manifested for magnetic fields nearly parallel to the columns via the critical scaling of vortex AC and DC transport properties. In contrast, for magnetic fields aligned close to the ab-plane, an XY-like vortex-glass transition prevails. For magnetic fields at intermediate angles, there is no evidence of any vortex phase transition, and the vortex dynamics is described in terms of the thermally activated flux flow model.

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Vortex phase diagram in heavy ion irradiated untwinned YBa2Cu3Oy single crystals

Physica C Superconductivity ◽

10.1016/j.physc.2007.04.051 ◽

2007 ◽

Vol 460-462 ◽

pp. 1204-1205 ◽

Cited By ~ 1

Author(s):

Norio Kobayashi ◽

Terukazu Nishizaki ◽

Kuniaki Kasuga ◽

Satoru Okayasu

Keyword(s):

Phase Diagram ◽

Single Crystals ◽

Heavy Ion ◽

Vortex Phase Diagram ◽

Vortex Phase

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MAGNETORESISTANCE IN Bi1.8Pb0.4Sr2Ca2Cu3Oy THICK FILM

Modern Physics Letters B ◽

10.1142/s0217984994001606 ◽

1994 ◽

Vol 08 (26) ◽

pp. 1661-1665

Author(s):

WANG ZHIHE ◽

HAN HANMIN ◽

HAN GUCHANG ◽

WANG SHUNXI

Keyword(s):

Magnetic Field ◽

Thick Film ◽

Applied Magnetic Field ◽

Flow Region ◽

Irreversibility Line ◽

Flow Process ◽

Flux Flow ◽

Thermally Activated ◽

Thermally Activated Flux Flow ◽

Activated Flux

The magnetoresistance curves of Bi(2223) thick film were measured near T c with applied magnetic field parallel and perpendicular to the c axis ranging up to 0.12 T. The results show that thermally activated flux flow region does not exist very close to T c and magnetoresistive transition can be well described by a thermally activated flux flow process below 108.5 K and at lower magnetic field. The relation between applied magnetic field H and temperature T was found to fit with “irreversibility line.”

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