Magnetic torque

This demonstrates that the magnetic field strength of500 Gauss is enough to quench the thermal motion in xy plane. We also calculated the magnetic torque of the nanorod from the bulk magnetization of nickel to be approximately IE-15 A which produces... 

The wire comes to rest at an angle 6 when the magnetic torque and elastic torque balance (see Fig. 13b). 

Stepanov and Shliomis [80] have proposed an egg model akin to a three-dimensional form of the itinerant oscillator model [72]. (We recall [72] that in the itinerant oscillator, one relaxation mechanism occurs due to rotation of the oscillator as a whole, the other due to jumping of the inner rotator over a potential barrier) whereby the interdependence of the two relaxation mechanisms is taken into account. In the egg model [80], the ferrofluid particle is represented as an egg of volume V (the hydrodynamic volume) embedded in the liquid with viscosity 17. The magnetic moment of the ferroparticle is modeled by the yolk of volume V acts directly on the yolk but due to the viscosity of the white it is also transmitted to the eggshell. Such a model allows one to take into account the coupling between the two mechanisms in a quantitative way so that its influence on and may be estimated. 

The elastic, dielectric and magnetic torques can be evaluated from the functional derivative... 

Therefore we obtain the differential equation, which express the balance of the elastic and magnetic torques ... 

Appearance of ferromagnetic phase was recorded by means of ponderomotive method. Magnetic torque, acting on an example, is described by the following equation ... 

Increasing the angular velocity of the rotating field increases the phase lag between field and director until the maximum magnetic torque is exerted at a phase lag of t/4. The corresponding angular velocity is the critical angular velocity 0 ... 

Similar to the magnetic torque, an electric torque can be given as ... 

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