Flux dynamics of MgB[sub 2] superconductor by AC susceptibility measurements

2002 ◽  
Author(s):  
M. J. Qin
Keyword(s):  
Ac Susceptibility ◽  
Flux Dynamics

Harmonic Analysis of the AC Magnetic Response on Directionally Solidified YBaCuO Samples

1999 ◽  
Vol 13 (09n10) ◽  
pp. 1101-1106 ◽  
Author(s):  
M. Polichetti ◽  
S. Pace ◽  
A. Vecchione
Keyword(s):  
Magnetic Field ◽  
Diffusion Processes ◽  
Ac Susceptibility ◽  
Magnetic Response ◽  
Experimental Conditions ◽  
Flux Dynamics ◽  
Flux Flow ◽  
Flux Lines ◽  
Flux Dynamic ◽  
Ac Response

The transport properties and the dynamics of the flux lines have been investigated on YBaCuO melt textured by measuring the AC susceptibility harmonics as function of the temperature, at different frequencies and amplitudes of the AC magnetic field. The interpretation of the behavior of the experimental curves has been done by their comparison with the results obtained by critical state pictures and by simulations of the diffusion processes of the magnetic field which determine the AC response in presence of different regimes of flux dynamics. The temperature dependencies of the third harmonics of the AC susceptibility at different frequencies have been used in particular to determine what is the flux dynamic regime governing the magnetic response of melt textured samples in the different experimental conditions. A good qualitative agreement has been found between the experimental curves and the ones simulated by assuming that dissipation processes are a sequence of independent flux creep and flux flow events within a collective pinning framework.

Frequency response of AC susceptibility in high temperature superconductors

2005 ◽  
Vol 135 (3) ◽  
pp. 203-207 ◽  
Author(s):  
S.L. Liu ◽  
G.J. Wu ◽  
X.B. Xu ◽  
J. Wu ◽  
H.M. Shao ◽  
...  
Keyword(s):  
High Temperature ◽  
Frequency Response ◽  
Ac Susceptibility ◽  
High Temperature Superconductors

scholarly journals New Radical Cation Salts Based on BDH-TTP Donor: Two Stable Molecular Metals with a Magnetic [ReF6]2− Anion and a Semiconductor with a [ReO4]− Anion

2021 ◽  
Vol 7 (4) ◽  
pp. 54
Author(s):  
Nataliya D. Kushch ◽  
Gennady V. Shilov ◽  
Lev I. Buravov ◽  
Eduard B. Yagubskii ◽  
Vladimir N. Zverev ◽  
...  
Keyword(s):  
Radical Cation ◽  
Low Temperatures ◽  
Ac Susceptibility ◽  
Slow Relaxation ◽  
Organic Radical ◽  
Inorganic Anion ◽  
Distinctive Features ◽  
Metallic Character ◽  
Radical Cation Salts ◽  
Partial Population

Three radical cation salts of BDH-TTP with the paramagnetic [ReF6]2− and diamagnetic [ReO4]− anions have been synthesized: κ-(BDH-TTP)4ReF6 (1), κ-(BDH-TTP)4ReF6·4.8H2O (2) and pseudo-κ″-(BDH-TTP)3(ReO4)2 (3). The crystal and band structures, as well as the conducting properties of the salts, have been studied. The structures of the three salts are layered and characterized by alternating κ-(1, 2) and κ″-(3) type organic radical cation layers with inorganic anion sheets. Similar to other κ-salts, the conducting layers in the crystals of 1 and 2 are formed by BDH-TTP dimers. The partial population of positions of Re atoms and disorder in the anionic layers of 1–3 are their distinctive features. Compounds 1 and 2 show the metallic character of conductivity down to low temperatures, while 3 is a semiconductor. The ac susceptibility of crystals 1 was investigated in order to test the possible slow relaxation of magnetization associated with the [ReF6]2− anion.

scholarly journals Flux dynamics at the groundwater-surface water interface in a tropical catchment

Limnologica ◽  
2018 ◽  
Vol 68 ◽  
pp. 36-45 ◽  
Author(s):  
Hai Manh Vu ◽  
Margaret Shanafield ◽  
Okke Batelaan
Keyword(s):  
Surface Water ◽  
Water Interface ◽  
Flux Dynamics

Temperature dependence of AC-susceptibility and resistivity of AS-cast and annealed Fe73Al5Ga2P11C5B4 ribbon

2000 ◽  
Vol 215-216 ◽  
pp. 260-263 ◽  
Author(s):  
H Sassik ◽  
M Schönhart ◽  
R Grössinger ◽  
R Sato Turtelli ◽  
A Kottar
Keyword(s):  
Temperature Dependence ◽  
Ac Susceptibility

INTERGRANULAR PROPERTIES OF (Y1-x-yZrxCay)Ba2Cu3O7-δ COMPOUNDS

1999 ◽  
Vol 13 (13) ◽  
pp. 1645-1654 ◽  
Author(s):  
I. GR. DEAC ◽  
E. BURZO ◽  
A. V. POP ◽  
V. POP ◽  
R. TETEAN ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Ac Susceptibility ◽  
Temperature Dependent ◽  
Susceptibility Data ◽  
Dc Magnetic Field ◽  
Complex Susceptibility ◽  
Granular Superconductors ◽  
Intergranular Critical Current Density

The intergranular properties of ( Y 1-x-y Zr x Ca y) Ba 2 Cu 3 O 7-δ ceramics were studies by using temperature-dependent ac susceptibility measurements at zero dc magnetic field. The intergranular critical current density was determined from ac susceptibility data by varying the field amplitude H ac . From the imaginary part of the complex susceptibility, χ″(T), we have determined the temperature dependence of the critical current density by using the Bean's model. The ac field dependencies of the intergrain χ″-peak temperatures T p are linear and agree with Müller critical state model. The results were analyzed in terms of superconductor-insulator-superconductor (SIS)-and superconductor-normal-superconductor (SNS)-type models for granular superconductors.

ac susceptibility and weak-link-free behavior in an epitaxial film ofGdBa2Cu3O7−δ

1992 ◽  
Vol 46 (14) ◽  
pp. 9190-9194 ◽  
Author(s):  
J. W. Li ◽  
R. L. Wang ◽  
H. R. Yi ◽  
H. C. Li ◽  
B. Yin ◽  
...  
Keyword(s):  
Epitaxial Film ◽  
Weak Link ◽  
Ac Susceptibility ◽  
Free Behavior
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