Spin transfer

Spin transfer is like playing with a spinning top. When you spin a top, it starts turning around and around. That spinning is called "spin." In the same way, tiny particles inside computers and electronic devices can spin too, and that spinning can be used to store and manipulate information.

Imagine a tiny toy top spinning inside a computer. Sometimes that top spins clockwise, and sometimes it spins counterclockwise. We call those two directions "up" and "down." By switching the direction of the spinning top from up to down or vice versa, we can save a bit of information. This is called using spin to store data.

But how do we switch the direction of the spinning top? That's where spin transfer comes in. Imagine you have another toy top, and you're able to make it spin really fast. If you place that second spinning top near the first one, it can actually push the first top and change its direction. This is what we call spin transfer.

In electronics, we use a tiny electrical current instead of a spinning top to transfer the spin from one particle to another. When the spin of one particle is transferred to another, it can cause that other particle to spin in the opposite direction. This can be used to store and move information in electronic devices.

So, spin transfer is like using a spinning top to spin another top in the opposite direction. But in electronics, we use a tiny electrical current to transfer the spin from one particle to another, and this helps us store and manipulate information in our computers and devices.