00:01
This question you asked between explain, why the material could inhibit some phenomenon behavior? well, you know, you look at the materials, you know, some materials consist of atoms, you know, which, you know, has non -fully -paired, you know, non -fully -paired electrons in the atom.
00:24
So they actually, the atom actually becomes, i can carry a spin, right? and as being, you know, carries a magnetic movement.
00:32
So suppose you have, for example, an array of kind of atoms, right? atoms in a crystal, for example, you have an array, right, of these atoms.
00:44
And each atom carries kind of spin, right, like that.
00:48
Maybe i'm not going to draw, i'm not going to draw all of them.
00:50
So each atom will carry spin, which points in certain interaction.
00:53
But if, for example, if there's an interaction between the spins, for example, because magnetic interaction or because of some other interact.
01:02
There are many types of magnetic interactions that take place between two spins.
01:07
And therefore, the spins will kind of be, you know, copper to each other and they have to display a collective behavior, right? and if the company, for example, takes on such a way that, for example, if it's an active, the company strikes an active, then the spins would like, to align with each other in the same direction.
01:31
And like in that way, you would get a low temperature.
01:35
You would get a pharominent, pharomagnet behavior.
01:37
Basically it says that the spins, you know, pointing the same direction roughly, and that gives you a microscopic magnetic magnet, right? so that's how some other you could actually display fairer magnet behavior.
01:53
So you basically have two conditions.
01:55
One is there, you must have magnetic atoms, right? and the second, you must have, i mean, magnetic spins.
02:01
The second, you need to have a coupling between the spins so that, and the company has to be, you know, has to take on put a particular sign, the negative sign so that the company is fairly magnetic, right? and if you look at such a material at high temperature, it's actually spines are disrupted by several fluctuations and there's no magnetic behaviors.
02:21
And normally, a material consists of many, you know, is polychristolin, right? and actually, and it consists of many different domains, and the different domains have different magnetization.
02:32
So it may happen that all the other materials are magnetic, but actually they don't display any overall microscopic polarization because if you look at it, for example, a big chunk of this kind of material, and you might have many different domains, right? each domain goes with different directions.
02:54
For example, this domain goes this way, and this domain go to this way, this domain to this way, and so on like that.
03:00
And on the whole, there's no microscopy magnetization...