Ferromagnetic Definition and 76 Threads

Hello! Just so you know, I am a high school student. I am asking about this because I am an IB student and doing an extended essay (it's basically research, and a bunch of experimentation to answer a research question) on something related to magnetic fields, ferromagnetic materials, or...

How can one calculate (even as a rough estimate) the force exerted on a ferromagnetic object by a magnetic field created by a solenoid? Thanks

I have been working on a transformer that has a potential difference out but no current. it uses of electron spin orbit to work. here is a brief explanation with some references i have uncovered that iron is unique in that each atom has a magnetic moment, that is each atom has a north...

Is it true that every material can be attracted by a magnetic field provided that the magnetic field is STRONG enough?

Hello everyone. There is a little project I could use some help with. I would like this done in a spreadsheet, so I can mess around with different values. The Problem: On one hand, I have a permanent magnet and, on the other, I have a ferromagnetic object. I want to find out the force...

I have a Nickel cylinder, 5 micron in diameter and 10 micron in length. I know the external field \vec{B} is 80 gauss, what is the formula for the magnetic dipole moment of this cylinder in the field? Now I only have the formula for magnetic dipole of spheres, which is \mu = \frac{4}{3}\pi...

In the context of electromagnetic wave propagation in ferromagnetic medium, what is meant by magnetostatic spin wave? This terminology one came across in the wave modulation in ferromagnetic medium. Thanks in well advance..

Hello when we study electromagnetic ,it is easy to find force of a magnetic field on particle witch has electric charge (for example electron and ...) but what is force of magnetic field on ferromagnetic materials? for example if we put a cube of soft iron with a*a*a dimentions near a...

I've searched high and low among the vast archives of the internet and have yet to find any kind of formula regarding the magnetic field strength of ferromagnetic material (i.e bar magnet... etc). Does anyone know what/if there is one? As is B(r)=...? Thanks

Hi everybody The bands of up- and down-spins are split in the bandstructur of a ferromagnet. Does the part with the higher amount result in a net magnetization? If yes, doesn't that mean, that electrons passing a ferromagnet, they align their spin in the opposite direction compared to the...

I searched around the forum and found no mention of this so I figured I'd bring it up. Acura has been airing these commercials ( http://www.youtube.com/watch?v=rnZ4EyKrLAI" ) that claim to use a ferromagnetic liquid instead of oil and then claim that it improves handling. Is any of this true...

I'm doing a research project using sensors in mobile smartphones, mainly the magnetometer. After taking extensive measurements on some pillars, in a hallway, that seem to give off a high magnetic field, measured by the smartphone's magnetometer, I now want to compare these magnetic field...

"Amorphous Ferromagnetic Metallic Alloys" Hello all, In a project in which I'm looking to endeavor, I have a need for a material with high magnetic permeability and high electrical resistivity. In beginning my research, I came across this in Wikipedia: "One can also make amorphous...

Can anyone help me understand why magnetic flux flows through ferromagnetic materials like an iron ring? Also, say you have a toroid with a wire wrapped around it (in air) how can you say that the flux that goes through one "loop" will go through ALL the others? These are just some things...

Homework Statement hamiltonian is given by H=-\sum Jij si sj so interaction constants are Jij=EiEj and Ei=+1,-1 si=+1,-1 randomly , they are spin variables. the question is : show that this system is equivalent to a ferromagnet, by redefining the spin variables. The Attempt at a Solution...

Can the wire windings in an electric motor be ferromagnetic and still operate? Why?

Homework Statement Near the critical point, Gibbs free energy of a ferromagnetic system can be written as (1). a)Using the definition of magnetization, (2), show that m(t,H=0) = Bt^{\beta} B is a constant. Determine \beta in relation to \alpha and \Delta b) Show that the...

I'm wondering about general magnetic forces, specifically the behavior of unmagnetized ferromagnetic materials in a magnetic field. I.e., a simple bar or electromagnet picking up an unmagnetized piece of iron. Are there formulas to explain this behavior? The lorenz force equations by...

Hi everybody, I have faced with a problem in my report. The question said that "How can ferromagnetic effect change to depend on particle/grain size(at nm (10, 50, 100, 1000...) and at \mum (0.5, 1, 2...)?" (In shortly, what can we observe at feromagnetic effect if we increase and decrease of...

once a ferromagnetic material is magnetized, does it ever go back to it's original "randome magnetic moment" state?

Homework Statement It's a past paper question, but I just don't understand it. I must have missed something here... Homework Equations Maxwell's equations, \frac{B}{\mu_{0}} = H + M, M=\chi H change in stored energy = H.dB The Attempt at a Solution (a) \nabla\times H =...

a- I place a ferromagnetic dipole in a uniform magnetic field so that the axis of the dipole moment vector does not lie parallel to the magnetic field lines. Is there a net force on the dipole? Is there a net force? b- I place a ferromagnetic dipole in a uniform magnetic field so that the axis...

Here's the situation: We have a ruler, inclined slightly with a strong ceramic magnet at the end. Now, we put two identical ferromagnetic (steel, for example) balls on the top of the ramp, touching each other. We let the balls roll down the ramp, and, perhaps against intuition, the balls...

What is the difference between paramagnetic materials and their behaviour in magnetic fields?? Thanks a lot for the help...having a magnetism test 2 days from now:frown:

for a ferromagnetic metal, the there will be splitting of energy band(one for spin up e- and one for spin down e-) under the influence of external magnetic field. the it is known as exchange splitting. here are my questions 1. what determine the degree of splitting? i guess it depends on the...

Can a single atom of a ferromagnetic material display properties of ferromagnetism? In other words, is an iron atom affected by magnetic fields the same way a chunk of iron is? In other other words, does a single atom of a ferromagnetic material still have a net magnetic dipole moment, or is...