TY - JOUR
T1 - Levitation force between a superconductor and a permanent magnet with cylindrical symmetry
AU - Sanchez, Alvaro
AU - Navau, Carles
PY - 2001/11/1
Y1 - 2001/11/1
N2 - In order to understand the levitation phenomena of superconductors (SCs), experiments are often realized by studying the levitation force between a cylindrical SC and a coaxial permanent magnet. In this work, we study these experiments by theoretical models we have derived in two stages. In the first stage, we assume both that the SC has no demagnetizing effects and that the applied field is vertical in the SC volume. Within these approximations, we derive simple analytical models that can explain the main features of levitation. In a second step, we present a numerical model which simulates the general case, including the effect of demagnetizing fields in the SC and the application of an arbitrary external field that keeps the cylindrical symmetry. The conditions for using either the simplified analytical models or the complete numerical one are discussed. © 2001 Elsevier Science B.V. All rights reserved.
AB - In order to understand the levitation phenomena of superconductors (SCs), experiments are often realized by studying the levitation force between a cylindrical SC and a coaxial permanent magnet. In this work, we study these experiments by theoretical models we have derived in two stages. In the first stage, we assume both that the SC has no demagnetizing effects and that the applied field is vertical in the SC volume. Within these approximations, we derive simple analytical models that can explain the main features of levitation. In a second step, we present a numerical model which simulates the general case, including the effect of demagnetizing fields in the SC and the application of an arbitrary external field that keeps the cylindrical symmetry. The conditions for using either the simplified analytical models or the complete numerical one are discussed. © 2001 Elsevier Science B.V. All rights reserved.
KW - Critical state
KW - Demagnitizing effects
KW - Levitation
KW - Levitation force
U2 - https://doi.org/10.1016/S0921-4534(01)00796-1
DO - https://doi.org/10.1016/S0921-4534(01)00796-1
M3 - Article
VL - 364-365
SP - 360
EP - 362
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
ER -