Interaction between a magnetic dipole and a superconducting sphere.
On the basis of the Meissner effect and the London theory of superconductivity, we theoretically studied the interaction between a magnetic point dipole and a superconducting sphere. Furthermore, the force acting on the tip of a magnetic force microscope from a superconducting sphere was derived on the basis of the London theory of superconductivity. For a micro-system, we derived an analytical expression of the repelling forces as a function of the London penetration depth {lambda}(T) and suggest an experimental method to measure {lambda}(T) as a function of temperature T. From the model study, we show the invalidity of the frequency used image method for some superconductor-magnet systems.
- Research Organization:
- Argonne National Laboratory (ANL)
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 942338
- Report Number(s):
- ANL/ET/JA-30419
- Journal Information:
- Solid State Commun., Journal Name: Solid State Commun. Journal Issue: 12 ; 1998 Vol. 107; ISSN 0038-1098; ISSN SSCOA4
- Country of Publication:
- United States
- Language:
- ENGLISH
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