Superconducting nanowire fiber mats and the paramagnetic Meissner effect

2021 ◽  
Author(s):  
M.R. Koblischka ◽  
A. Koblischka-Veneva ◽  
A.L. Pessoa ◽  
C.L. Carvalho ◽  
R. Zadorosny
Keyword(s):  
Meissner Effect ◽  
Fiber Mats ◽  
Paramagnetic Meissner Effect ◽  
Superconducting Nanowire

scholarly journals Paramagnetic Meissner effect in multiply-connected superconductors

2000 ◽  
Vol 62 (21) ◽  
pp. 14380-14383 ◽  
Author(s):  
A. P. Nielsen ◽  
A. B. Cawthorne ◽  
P. Barbara ◽  
F. C. Wellstood ◽  
C. J. Lobb ◽  
...  
Keyword(s):  
Meissner Effect ◽  
Paramagnetic Meissner Effect ◽  
Multiply Connected

NOVEL MAGNETIC PROPERTIES IN MULTI-WALLED CARBON NANOTUBE MATS: CONSISTENT WITH THE PARAMAGNETIC MEISSNER EFFECT DUE TO ULTRAHIGH-TEMPERATURE SUPERCONDUCTIVITY

2009 ◽  
Vol 23 (20n21) ◽  
pp. 4285-4296 ◽  
Author(s):  
GUO-MENG ZHAO ◽  
PIEDER BEELI
Keyword(s):  
Carbon Nanotube ◽  
Saturation Magnetization ◽  
Magnetic Measurements ◽  
Meissner Effect ◽  
Magnetic Data ◽  
Ferromagnetic Transition ◽  
Measured Concentration ◽  
Paramagnetic Meissner Effect ◽  
Multi Walled Carbon Nanotube ◽  
Ultrahigh Temperature

We report magnetic measurements up to 1200 K on iron-contaminated multi-walled carbon nanotube mats with a Quantum Design vibrating sample magnetometer. Extensive magnetic data consistently show a ferrromagnetic transition at about 1000 K and a ferromagnetic-like transition at about 1275 K. The ferromagnetic transition at about 1000 K is associated with an Fe impurity phase and its saturation magnetization is in quantitative agreement with the Fe concentration measured by an inductively coupled plasma mass spectrometer. On the other hand, the saturation magnetization for the ferromagnetic-like phase (at 1275 K) is about four orders of magnitude larger than that expected from the measured concentration of Co or CoFe . We show that this ultrahigh-temperature ferromagnetic-like behavior cannot be explained by ferromagnetism of any Fe -carbon phases, carbon-based phases, or magnetic impurities, but is consistent with the paramagnetic Meissner effect (orbital ferromagnetism) due to the existence of π Josephson junctions in a granular superconductor.

scholarly journals Paramagnetic Meissner effect and strong time dependence at high fields in melt-textured high-T C superconductors

2013 ◽  
Vol 62 (10) ◽  
pp. 1414-1417 ◽  
Author(s):  
Cristol de Paiva Gouvêa ◽  
Fábio Teixeira Dias ◽  
Valdemar das Neves Vieira ◽  
Douglas Langie da Silva ◽  
Jacob Schaf ◽  
...  
Keyword(s):  
Time Dependence ◽  
Meissner Effect ◽  
Paramagnetic Meissner Effect ◽  
High Fields

Phenomenological theory of the paramagnetic Meissner effect

1994 ◽  
Vol 72 (17) ◽  
pp. 2773-2776 ◽  
Author(s):  
Daniel Domínguez ◽  
E. A. Jagla ◽  
C. A. Balseiro
Keyword(s):  
Phenomenological Theory ◽  
Meissner Effect ◽  
Paramagnetic Meissner Effect

Paramagnetic Meissner effect in HTSC

1994 ◽  
Vol 194-196 ◽  
pp. 2229-2230 ◽  
Author(s):  
N. Knauf ◽  
W. Braunisch ◽  
G. Bauer ◽  
A. Kock ◽  
A. Becker ◽  
...  
Keyword(s):  
Meissner Effect ◽  
Paramagnetic Meissner Effect
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