scholarly journals Extended dislocation-based pinning mechanism in superconducting YBa2Cu3O7 films

2010 ◽  
Vol 107 (9) ◽  
pp. 09E118 ◽  
Author(s):  
S. V. Pysarenko ◽  
A. V. Pan ◽  
S. X. Dou ◽  
R. Nigam
Keyword(s):  
Pinning Mechanism ◽  
Extended Dislocation

scholarly journals On the pinning force in high density MgB2 samples

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
V. Sandu ◽  
A. M. Ionescu ◽  
G. Aldica ◽  
M. A. Grigoroscuta ◽  
M. Burdusel ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Field Dependence ◽  
Scaling Law ◽  
Critical Force ◽  
High Density ◽  
Pinning Force ◽  
Pinning Mechanism ◽  
Grain Boundary Pinning ◽  
Peaked Function ◽  
Main Factor

AbstractAn analysis of the field dependence of the pinning force in different, high density sintered samples of MgB2 is presented. The samples were chosen to be representative for pure MgB2, MgB2 with additives, and partially oriented massive samples. In some cases, the curves of pinning force versus magnetic field of the selected samples present peculiar profiles and application of the typical scaling procedures fails. Based on the percolation model, we show that most features of the field dependence of the critical force that generate dissipation comply with the Dew-Hughes scaling law predictions within the grain boundary pinning mechanism if a connecting factor related to the superconducting connection of the grains is used. The field dependence of the connecting function, which is dependent on the superconducting anisotropy, is the main factor that controls the boundary between dissipative and non-dissipative current transport in high magnetic field. Experimental data indicate that the connecting function is also dependent on the particular properties (e.g., the presence of slightly non-stoichiometric phases, defects, homogeneity, and others) of each sample and it has the form of a single or double peaked function in all investigated samples.

scholarly journals The competitive nucleation of misfit dislocation dipole and misfit extended dislocation dipole in nanocomposites

2017 ◽  
Vol 228 (7) ◽  
pp. 2541-2554 ◽  
Author(s):  
Jianfeng Zhao ◽  
Jinlin Liu ◽  
Guozheng Kang ◽  
Linan An ◽  
Xu Zhang
Keyword(s):  
Misfit Dislocation ◽  
Dislocation Dipole ◽  
Extended Dislocation

scholarly journals Magnetophonons & type-B Goldstones from hydrodynamics to holography

2020 ◽  
Vol 2020 (9) ◽  
Author(s):  
Matteo Baggioli ◽  
Sebastian Grieninger ◽  
Li Li
Keyword(s):  
Magnetic Field ◽  
2D Materials ◽  
Goldstone Boson ◽  
Quasinormal Modes ◽  
Effective Field ◽  
Zero Magnetic Field ◽  
Type B ◽  
Hydrodynamic Modes ◽  
Pinning Mechanism ◽  
The Magnetic Field

Abstract We perform a detailed analysis of a large class of effective holographic models with broken translations at finite charge density and magnetic field. We exhaustively discuss the dispersion relations of the hydrodynamic modes at zero magnetic field and successfully match them to the predictions from charged hydrodynamics. At finite magnetic field, we identify the presence of an expected type-B Goldstone boson Re[ω] ∼ k2, known as magnetophonon and its gapped partner — the magnetoplasmon. We discuss their properties in relation to the effective field theory and hydrodynamics expectations. Finally, we compute the optical conductivities and the quasinormal modes at finite magnetic field. We observe that the pinning frequency of the magneto-resonance peak increases with the magnetic field, in agreement with experimental data on certain 2D materials, revealing the quantum nature of the holographic pinning mechanism.

Flux pinning mechanism in Ca1−xCdxLaBaCu3O7−y superconductor

1997 ◽  
Vol 282-287 ◽  
pp. 2129-2130
Author(s):  
Minghu Fang ◽  
Qinghu Chen ◽  
Zhengkuan Jiao ◽  
Qirui Zhang ◽  
Haihu Wen ◽  
...  
Keyword(s):  
Flux Pinning ◽  
Pinning Mechanism

scholarly journals Structure, Magnetic Properties and Magnetization Reversal Processes in Nanocrystalline Pr8Dy1Fe60Co7Mn6B14Zr1Ti3 Bulk Alloy

2019 ◽  
Vol 70 (11) ◽  
pp. 4086-4088
Keyword(s):  
Magnetic Properties ◽  
Magnetization Reversal ◽  
Exchange Interactions ◽  
Soft Magnetic ◽  
Bulk Alloy ◽  
Saturation Ratio ◽  
Pinning Mechanism ◽  
Strong Exchange ◽  
Xrd Studies ◽  
Bulk Alloys

The present paper presents results concerning on structure, magnetic properties and magnetization reversal processes in the as-cast Pr8Dy1Fe60Co7Mn6B14Zr1Ti3 alloy in the form of 1 mm plate. The XRD studies revealed coexistence of three phases dominant Pr2(Fe,Co)14B and minor á-Fe and Fe3B. The remanence-to-saturation ratio Jr/Js equaled 0.66 and indicated on existence of strong exchange interactions between hard and soft magnetic phases. The analysis of Mrev vs. Mirr dependences, the pinning mechanism was detected in studied alloy. Keywords: bulk alloys, magnetic properties, magnetization reversal processes

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

Hydrostatic pressure effect on superconductivity and vortex pinning mechanism of Sr(Fe0.88Co0.12)2As2 single crystal

2019 ◽  
Vol 563 ◽  
pp. 22-27
Author(s):  
Nallathambi Subbulakshmi ◽  
Ganesan Kalaiselvan ◽  
Krishnan Manikandan ◽  
Raman Thiyagarajan ◽  
Sonachalam Arumugam
Keyword(s):  
Hydrostatic Pressure ◽  
Single Crystal ◽  
Pressure Effect ◽  
Vortex Pinning ◽  
Pinning Mechanism
Sign in / Sign up

Export Citation Format

Share Document