What is magnetostriction?, Physics

Assignment Help:

 

If we have to strain a ferromagnetic crystal along certain direction, we would change the inter atomic spacing not only along this direction but also in other direction. And hence the exchange interactions between the atomic spins are also changed. This would lead to a change in the magnetization property of crystal. When an iron crystal is placed in a magnetic field along an easy direction, it gets longer along this direction but contracts in the transverse directions. The longitudinal strain $l/l along the direction of magnetization is called magnetostriction constant denoted by λ. When the crystal reaches saturation magnetization, λ also reaches saturation called saturation strain. The crystal lattice strain energy associated with magnetostriction is called magnetostrictive energy. Magnetostriction is responsible for transformer hum noise.


Related Discussions:- What is magnetostriction?

Illustrate the value of collector current, Figure shows the transfer charac...

Figure shows the transfer characteristic for an n-p-n silicon transistor.When the base current is 2.5mA, Verify (a) the value of collector current, (b) the static value of

Semiconductor and data storage of electron microscopy, Explain semiconducto...

Explain semiconductor and data storage of electron microscopy. Semiconductor and data storage a. Circuit edit b. Defect investigation and c. Failure analysis.

Atomic structure, Atoms are particles of elements, substances that could no...

Atoms are particles of elements, substances that could not break down further. In examining atomic structure through, we have to clarify this statement. An atom cannot be broken do

Why area of surface has no role in motion due to friction, Friction is a mi...

Friction is a microscopic constant and so macroscopic level area does not matter. But area would matter if the object we''re putting under study was microscopic, which isn''t in o

Calculating unknown resistances by wheatstone bidge, Calculating unknown re...

Calculating unknown resistances The current through the galvanometer (G) - a very sensitive ammeter, is reduced to zero by adjusting R 4 .  The bridge is then said to be balanc

What is the resistance of a coil of aluminium wire, What is the resistance ...

What is the resistance of a coil of aluminium wire The resistance of a coil of aluminium wire at 18 ? C is 200?. The temperature of the wire is increased and the resistance

Evaluate the period of the vibrating object, Q. A twelve-slit strobe disc i...

Q. A twelve-slit strobe disc is rotated at the max stopping frequency for a vibrating object. The strobe is rotated at 4.0 Hz. (a) Evaluate the period of the vibrating object?

What is thermal neutrons, Fast neutrons can be changed into slow neutrons b...

Fast neutrons can be changed into slow neutrons by certain materials known as moderator's  when last moving neutrons pass by a moderator, they combine with the molecules of the mod

Axial position of chair or boat , Why bulky group present at axial position...

Why bulky group present at axial position of chair or boat conformer is less stable compared to equitorial position? Ans) Let the bulky group has a large mass M. suppose it is a

Which material has the highest melting point, Which of the following materi...

Which of the following material has the highest melting point (A) Copper. (B) Aluminium. (C) Tungsten. (D) Gold. Ans: Tungsten has the highest melting 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