Types of superconductors, Physics

Assignment Help:

 

Type 1 and type 2 superconductors: For one group of SUPERCONDUCTOR in which below Hc is in the Meissner state, where it excludes all the magnetic flux from the interior of the sample. Above Hc it is in normal state, where the magnetic flux penetrates the sample as it would normally and the conductivity is finite. The superconductor of this group is called Type 1 superconductor or soft superconductor. They are usually pure specimens of some elements and the value of critical magnetic field for them is always too low to have any useful technical applications in coils for super conducting magnets. They are completely diamagnetic and give away their super conductivity at lower field strength. For other groups of superconductors, the transition does not occur sharply from the Meissner state to the normal state, but goes through an intermediate phase. The applied field is able to pierce through certain local regions of the sample. As the applied field is below than Hc1, the specimen is diamagnetic and hence the flux is completely excluded in this range of field, it is called critical field. At this flux begins to penetrate the specimen and the penetration increases until Hc2 is reached. At Hc2 the magnetization vanishes and the specimen becomes normal conductor, Hc2 is called upper critical field. Moreover, the magnetization of this group of superconductors vanishes gradually as the field is increased rather than suddenly as for the Type 1 superconductors. However they are completely superconductors for all fields below Hc2. The superconductors of this group are called Type 2 superconductors or hard superconductors. They tend to be alloys or transition metals with high values of electrical resistivity in the normal state.

INTERMEDIATE STATE: When the specimen becomes super conductor the flux is concentrated at the sides of the specimen the initiation of the transition from superconducting state to normal state may exists as a complex mixture of normal and superconducting regions called the Intermediate state. The intermediate state is considered completely equivalent to a mixture of the two states.

 


Related Discussions:- Types of superconductors

Truck rear ends car- momentum and collisions, Truck Rear Ends Car Colli...

Truck Rear Ends Car Collisions among objects are governed through laws of momentum and energy. While a collision occurs within an isolated system, the total momentum of the sys

Explain electric motor, Electric Motor: A device, which converts electr...

Electric Motor: A device, which converts electric energy into mechanical energy is known as Electric Motor. Factors on which the speed of Rotation of Motor Depends: The

Temporal coharence, tell me about the terms of temporal coharence

tell me about the terms of temporal coharence

What is the cross-sectional area of a wire, Some wire of cross-sectional ar...

Some wire of cross-sectional area 1mm 2 has a resistance of 20 ?. Determine (a) the resistance of a wire of the same length and material if the cross-sectional area is 4mm 2 ,

Write the symbol sad truth table of an and gate, Write the symbol sad truth...

Write the symbol sad truth table of an AND gate define how this gate is realised in practice by using two diodes.

Angle of banking, Angle of banking: The angle made by the line joining...

Angle of banking: The angle made by the line joining the outer raised edge of the road to the inner edge with the horizontal line is called the angle of banking. Let AC rep

Radiation therapy-oxygen effect, Oxygen effect: The oxygen effect may p...

Oxygen effect: The oxygen effect may play a role in the recurrence of cancer .The cell near the center of a large tumor have a poor blood supply and thus  a poor oxygen supply

Tangent law, State two conditions which must be satisfied in order to apply...

State two conditions which must be satisfied in order to apply tangent law in magnetism

Left-hand rule, left-hand rule: It is the opposite-chirality version o...

left-hand rule: It is the opposite-chirality version of the right-hand rule.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd