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

What is the main constituents of glass, The main constituents of glass is ...

The main constituents of glass is (A) SiO 2           (B) B 2 O 3 (C) Al 2 O 3          (D) Cr 2 O 3 Ans: The main constituents of glass are SiO 2 .

Determine the velocity of sound in sea water, An undersea explosion occurs...

An undersea explosion occurs. If the sea water has density 1.03 x 10 3 kg/m3 and Bulk Modulus of 2.41x10 9 Nm -2 ; a)  Determine the velocity of sound in sea water b)  If

Carbon composition variable resistor, MANUFACTURING: Two processes are use...

MANUFACTURING: Two processes are used manufacturing. Coated film: A mixture of carbon, filler and binder is coated on a ring of insulating material. The surface of the film is

Calculate the sunrise and sunset local horizon points, This problem examine...

This problem examines the seasonal solar radiation budget at three geographical locations: the Equator, 40º North, and 80º North. NOTES: At a given geographical location, N

Explain the normal force - balanced forces, Explain the Friction Fricti...

Explain the Friction Friction is a force that works against all motion. It slows everything down and it is the reason that the motion we are most familiar with always seems to

What is head-on collision, HEAD-ON COLLISION:  "If the centers of the c...

HEAD-ON COLLISION:  "If the centers of the colliding bodies stay moving along the similar straight line, the collision is said to be head-on collision".

Explain different types of ct artifacts, Question 1. Explain different ...

Question 1. Explain different types of CT artifacts. 2. Discuss the applications of Multidetector CT. 3. How will you be able to obtain cross sectional images in CT scan?

What is the ratio of doped carriers to thermal carriers, At 200.0 K, german...

At 200.0 K, germanium has 1.16 x 10 10 thermally liberated charge carriers/cm 3 . If it is doped with 1 As atom to 525,000 Ge atoms, what is the ratio of doped carriers to the

Deduce an expression for the electric potential, Deduce an expression for t...

Deduce an expression for the electric potential because of an electric dipole at any point on its axis. Mention one contrasting feature of electric potential of a dipole at a point

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