/sci/ - Science & Math

>>4894820

The common magnets we use (including the ones you mention ) have d-shell (or f-shell in case of rare earth magnets) electrons incompletely filled, hence a net non-zero spin. The configuration of the bulk materials of these atoms is such that it allows for the arrows to move at room temperature (energetically favorable). They then have a huge relaxation time (bulk material property), hence it takes them centuries to loose there magnetism naturally. Now, the question becomes how will these materials align in the external field. Well for the ones you mention it is energetically favored for them to align parallel to the external field (hence they will have a net magnetism). For the rest of the atoms with incomplete orbitals (that have movable arrows at room temperature) they align anti-parrallel.

The determination of the bulk material properties of a substance form first principles in not trivial. It requires alot of material science, chemistry, and quantum mechanics. Often these calculations are so tedious that they do them on super-computers. This is still an area of active research, and there is no easy way to determine all the bulk properties of any random material. We lack the computer power....

Questions???

>>4069248
>Butt hurt christfag is butthurt

With all the priests, I would think you would be used to a hurt ass-hole already?