Magnetic Solids

Diamagnetic Fields

• Contents induced that travels in the opposite direction of the material
• These "magnets" will repel permanent magnets when there is a meaningful magnetic field is applied
• Every material intrinsically has a diamagnetic property

Paramagnetic Fields

• Each atoms have "unpaired electrons" — electrons are oriented at a random spin
• When a magnetic field is applied, the electrons align with the direction of the magnetic field.
• Upon removal of the magnetic field, the electrons get randomly spun again

Ferromagnetic Fields

• Unpaired electrons already partially align to each other
• Each block of aligned electron is called a "domain"
• After applying a field, heat the material up => you get aligned domains! You end up with a permanent magnet
• Heating the magnet above currie temperature again will destroy the magnet

Earth field generated by having a fluid core and spinning reasonably quickly.

=> Auroras are caused by deflecting of the sun's solar flares through the Earth's magnetic field