IDC351 Report number:01
Physics Talk
Melting of the vortex lattice in a Type
II superconductor:A story from images
Speaker:
Prof. Pratap Raychaudhury
Tata Institute of Fundamental Research
Date: 10/03/2017
Author:
Meenakshi
MS14077
I. BACKGROUND AND SUMMARY OF TALK
In a type-II superconductor,magnetic flux lines interacts among themselves to form a periodic structure called ”vortex lattice”. This occurs above a certain critical field strength. The vortex density increases with increasing field strength.This system has long been used as a versatile model system to study the interplay between interaction and random pinning.The pinning is very strong when the vortices are completely frozen in their position.These factors determine the pinning force
of
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How to Supercool water?
In the end the speaker asked us to do a small task and see the supercooling of water.All we need is bottle of distilled water and refrigerator. We will put bottle of distilled water in the freezer for about 2-3 hours and we going to need to take it out carefully from the freezer and when ever you ready to make Instant Ice just hit the bottle and it will turn to ice in seconds.
This happens because the water kept in the bottle is pure and requires some event/hit to start nucleation process so that some of the molecules can be lined up forming ice and subsequently others follows them.Tapping the bottle does that and hence ice formation starts in the bottle.
Future Aspects
The future aspects are to probe other systems,such as colloidal crystals and magnetic arrays to explore if this scenario is generic to order-disorder transitions in the presence of random pinning.
II. COMMENTS ON TALK CONTENT
The talk material included all the significant effects of the magnetic field on the type-II
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8. Pour 16 oz of room-temperature water into the bottle. 9. Stretch
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