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?

Determine magnetic circuit of uniform cross-sectional area, A section throu...

A section through a magnetic circuit of uniform cross-sectional area 2cm 2 is shown in Figure. The cast steel core has a mean length of 25cm. The air gap is 1mm wide and the

Moment, Moment, Centre of mass and Centroid Moment of force is tendency...

Moment, Centre of mass and Centroid Moment of force is tendency of the force to twist or rotate an object. A measure of the body's resistance to the angular acceleration, which

Determine the temperature and the entropy generation, Hexane is throttled f...

Hexane is throttled from 18.15 bar, 507.6 K to 0.1 bar.  Determine the temperature at the exit and the entropy generation. Steam is cooled under constant pressure from 400 o C,

Evaluate direction of f relative to the +x-axis, The magnitude of the force...

The magnitude of the force vector F is 270 newtons. They component of this vector is directed along the +y axis and has magnitude of 150 N. The x component is directed along the +x

Define beats, When two dissimilar sound rays of slightly different frequenc...

When two dissimilar sound rays of slightly different frequencies, traveling in a phase along the same direction, superimpose on one other, the intensity of the resultant sound at a

Define neutron, Neutron is a fundamental particle which is necessary consti...

Neutron is a fundamental particle which is necessary constituent of all nuclei except that of hydrogen molecule. It was discovered by Chadwick. (1) The charge of neutron: It is

Force, Force: Force may be defined as a push or a pull upon an object. ...

Force: Force may be defined as a push or a pull upon an object.  In the English system the pound (1b) is used to express the value of a force.  For example, we say that a force

Determine the magnitude and direction of a single force, The cantilevered b...

The cantilevered beam below is supported at O.  F1 and F2 in kN are given in P21 and P22 respectively and act on the beam as shown.  Determine the magnitude and direction of a sing

Determine the effective focal length of the combination, Two thin convex le...

Two thin convex lenses of focal lengths 0.15m and 0.2m are separated by a distance of 0.6m. Determine the effective focal length of the combination.

What are the applications of transistors? , A transistor is a semiconducto...

A transistor is a semiconductor device used to amplify and switch electronic signals and electrical power. It is composed of semiconductor material with at least 3 terminals for co

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