Thermal fluctuation effects on the magnetization above and below the superconducting transition in Bi2Sr2CaCu2O8 and YBa2Cu3O7?? crystals in the weak magnetic field limit

1996 ◽  
Vol 105 (5-6) ◽  
pp. 1111-1116 ◽  
Author(s):  
J. Mosqueira ◽  
M. V. Ramallo ◽  
A. Pomar ◽  
C. Torr�n ◽  
F�lix Vidal
Keyword(s):  
Magnetic Field ◽  
Weak Magnetic Field ◽  
Thermal Fluctuation ◽  
Superconducting Transition ◽  
Field Limit ◽  
Fluctuation Effects

Anomalous Hall Effect of YBa2Cu3O7-δ in the Low-Magnetic-Field Limit

1998 ◽  
Vol 12 (18) ◽  
pp. 719-726 ◽  
Author(s):  
Wang Yun-Ping ◽  
Zhang Dian-Lin ◽  
Zhao Bai-Ru
Keyword(s):  
Magnetic Field ◽  
Hall Effect ◽  
Anomalous Hall Effect ◽  
Superconducting Transition ◽  
Critical Fluctuation ◽  
Field Limit ◽  
Flux Flow ◽  
Hall Resistivity ◽  
Low Magnetic Field ◽  
The Magnetic Field

The Hall effect of YBa 2 Cu 3 O 7-δ epitaxial films in the vicinity of superconducting transition was studied under ultra low magnetic fields down to 10-3 T where some field-induced extrinsic effects, such as the reduction and broadening of the transition temperature and the enhancement of fluctuation, can be neglected. The Hall sign reversal was still observed down to the lowest field we arrived, which shows that any mechanism connected with above mentioned extrinsic changes cannot be responsible for the effect. The Hall resistivity ρxy, Hall angle tan α and Hall conductivity σxy are all simply proportional to the magnetic field, resembling the behaviors of the ordinary Hall effect in the low-magnetic-field limit. The temperature range with observable negative Hall resistivity coincides with the critical fluctuation region. These behaviors shows that the negative Hall effect cannot be understood in the picture of flux flow.

Enhancing weak magnetic field MME coupling in NdFeB magnet/piezoelectric composite cantilevers with stress concentration effect

2021 ◽  
Vol 118 (13) ◽  
pp. 132902
Author(s):  
Zhonghui Yu ◽  
Zhaoqiang Chu ◽  
Jikun Yang ◽  
Mohammad Javad Pourhosseini Asl ◽  
Zhanmiao Li ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Stress Concentration ◽  
Weak Magnetic Field ◽  
Concentration Effect ◽  
Piezoelectric Composite ◽  
Ndfeb Magnet ◽  
Stress Concentration Effect

scholarly journals Thermal fluctuation noise in Mo/Au superconducting transition-edge sensor microcalorimeters

2019 ◽  
Vol 125 (16) ◽  
pp. 164503 ◽  
Author(s):  
N. A. Wakeham ◽  
J. S. Adams ◽  
S. R. Bandler ◽  
S. Beaumont ◽  
J. A. Chervenak ◽  
...  
Keyword(s):  
Transition Edge Sensor ◽  
Thermal Fluctuation ◽  
Superconducting Transition ◽  
Transition Edge ◽  
Fluctuation Noise
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