scholarly journals Investigation on the flux pinning force and flux pinning mechanism in Ba1-xKxFe2As2 single crystal with Tc = 38.5 K

2015 ◽  
Vol 64 (11) ◽  
pp. 117401
Author(s):  
Wang Chun-Lei ◽  
Yi Xiao-Lei ◽  
Yao Chao ◽  
Zhang Qian-Jun ◽  
Lin He ◽  
...  
Keyword(s):  
Single Crystal ◽  
Flux Pinning ◽  
Pinning Force ◽  
Pinning Mechanism ◽  
Flux Pinning Force

TEMPERATURE SCALING OF THE FLUX PINNING FORCE FOR SmBa2Cu3O7-x SINGLE CRYSTAL

2005 ◽  
Vol 19 (01n02) ◽  
pp. 55-58
Author(s):  
L. ZHANG ◽  
G. LIU ◽  
X. LENG ◽  
X. B. XU ◽  
S. Y. DING ◽  
...  
Keyword(s):  
Single Crystal ◽  
Flux Pinning ◽  
Scaling Law ◽  
Force Density ◽  
Pinning Force ◽  
Pinning Mechanism ◽  
Maximum Value ◽  
Temperature Scaling ◽  
Pinning Force Density ◽  
Flux Pinning Force

Magnetic critical current density was measured at various temperatures and fields for SmBa 2 Cu 3 O 7-x single crystal. Pronounced second peaks were observed at intermediate fields and temperatures. Normalized pinning force density [Formula: see text] exhibited a clear scaling law when H was normalized by H max where the pinning force density has the maximum value. This is an indication that a single pinning mechanism exists in the investigated temperature region.

The cooling rate effect on structure and flux pinning force of FeTeSe single crystal deposited by self-flux method

2018 ◽  
Vol 29 (8) ◽  
pp. 6477-6483 ◽  
Author(s):  
Derya Farisoğulları ◽  
Nilay Kantarcı Güler ◽  
Kübra Yakıncı ◽  
Ahmet Ekicibil ◽  
Faruk Karadağ ◽  
...  
Keyword(s):  
Single Crystal ◽  
Cooling Rate ◽  
Flux Pinning ◽  
Rate Effect ◽  
Pinning Force ◽  
Flux Method ◽  
Flux Pinning Force

Macrosegregation of Y2Ba1Cu1O5 particles in Y1Ba2Cu3O7−δ crystals grown by an undercooling method

1996 ◽  
Vol 11 (4) ◽  
pp. 795-803 ◽  
Author(s):  
A. Endo ◽  
H. S. Chauhan ◽  
T. Egi ◽  
Y. Shiohara
Keyword(s):  
Growth Rate ◽  
Flux Pinning ◽  
Faraday Effect ◽  
Growth Direction ◽  
Pinning Force ◽  
Garnet Film ◽  
Iron Garnet ◽  
Flux Pinning Force ◽  
Good Agreement ◽  
Iron Garnet Film

Macrosegregation of Y2Ba1Cu1O5 (Y211) particles was observed in Pt-added Y1Ba2Cu3O7−δ (Y123) crystals grown by an undercooling method. It was found that the macrosegregation of Y211 particles depended on the growth direction and the growth rate (R) as a function of undercooling (ΔT). The amount of Y211 particles in Y123 crystals grown at large R was larger than at small R. Also, the amount of Y211 in Y123 growing along the a-direction was larger than that along the c-direction. Further, it was noted that the smaller Y211 particles in size were distributed in Y123 grown at large R. These phenomena could be at least qualitatively explained by the prevalent trapping/pushing theory. In the direct observation of magnetic flux with the Faraday effect of iron garnet film, the flux pinning force was found to be in good agreement with the macrosegregation of Y211 particles.

Anisotropic critical current density and flux pinning mechanism of Fe1+yTe0.6Se0.4 single crystals

2021 ◽  
Author(s):  
Yongqiang Pan ◽  
Nan Zhou ◽  
Bencheng Lin ◽  
Jinhua Wang ◽  
Zengwei Zhu ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Single Crystals ◽  
Critical Current ◽  
Current Density ◽  
Flux Pinning ◽  
Magnetic Hysteresis ◽  
Magnetic Hysteresis Loop ◽  
Pinning Force ◽  
Magnetization Relaxation ◽  
Pinning Mechanism

Abstract Fe1+yTe0.6Se0.4 has considerable application potential due to its large critical current density (J c) and high upper critical magnetic field (H c2). However, the uncertainty of the anisotropy of J c and the unclear flux-pinning mechanism have limited the application of this material. In this study, the J c in three directions were obtained from magnetic hysteresis loop measurements. A large anisotropy of J c ab /J c c ~ 10 was observed, and the origin of the anisotropy was discussed in details. Flux pinning force densities (F p) were obtained from J c, and a non-scaling behavior was found in the normalized pinning force f p[F p/F p-max] versus the normalized field h[H/H c2]. The peaks of pinning force shift from a high h to a low h with increasing temperature. Based on the vortex dynamics analysis, the peak shift was found to originate from the magnetization relaxation. The J c and F p at critical states free from the magnetic relaxation were regained. According to the Dew-Hughes model, the dominant pinning type in Fe1+yTe0.6Se0.4 clean single crystals was confirmed to be normal point pinning.

scholarly journals Enhancement of superconducting properties and flux pinning mechanism on Cr0.0005NbSe2 single crystal under Hydrostatic pressure

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
S. Arumugam ◽  
Manikandan Krishnan ◽  
Kent Ishigaki ◽  
Jun Gouchi ◽  
Rukshana Pervin ◽  
...  
Keyword(s):  
Hydrostatic Pressure ◽  
Single Crystal ◽  
Flux Pinning ◽  
Superconducting Properties ◽  
Pinning Mechanism

scholarly journals Increased flux pinning force and critical current density in MgB2 by nano-La2O3 doping

2020 ◽  
Vol 756 ◽  
pp. 012019
Author(s):  
Danlu Zhang ◽  
Fang Wan ◽  
Michael D. Sumption ◽  
Edward W. Collings ◽  
CJ Thong ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Flux Pinning ◽  
Pinning Force ◽  
Flux Pinning Force

scholarly journals Pinning Force Scaling Analysis of Polycrystalline MgB2

2020 ◽  
Vol 33 (11) ◽  
pp. 3333-3339
Author(s):  
M. R. Koblischka ◽  
A. Wiederhold ◽  
A. Koblischka-Veneva ◽  
C. Chang
Keyword(s):  
Grain Boundaries ◽  
Flux Pinning ◽  
The Other ◽  
Scaling Analysis ◽  
Pinning Force ◽  
Spark Plasma ◽  
Force Scaling ◽  
Flux Pinning Force

Abstract Flux pinning force scaling $f=F_{p}/F_{p,\max \limits }$ f = F p / F p , max vs. h = Ha/Hirr was performed on a variety of pure MgB2 samples, including a spark plasma sintered (SPS) one and a series of samples sintered at various reaction temperatures ranging between 775 and 950 ∘C. The SPS sample exhibits a well-developed scaling at all temperatures, and also the sintered samples prepared at 950 ∘C; however, the obtained peak positions of the pinning force scalings are distinctly different: The SPS sample reveals dominating pinning at grain boundaries, whereas the dominating pinning for the other one is point-pinning. All other samples studied reveal an apparent non-scaling of the pinning forces. The obtained pinning parameters are discussed in the framework of the Dew–Hughes’ pinning force scaling approach.

Sign in / Sign up

Export Citation Format

Share Document