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Ferromagnetism (HAZIQAH 4SSCZ) (Ferromagnetism Usage Material (:check:…
Ferromagnetism (HAZIQAH 4SSCZ)
Introduction
:smiley: most common the average person recollects
:smiley: the spins of the electrons are all pointing in the same direction
:smiley: causes permanent magnets to attract through opposite poles, south to north and vise versa
Ferromagnetism Usage Material
:check: Most common cobalt, iron, nickel
:check: affecting our everyday lives is through magnetic storage in the form of data
:check: Once it magnetized in specified direction it
loses the ability to lose its magnetization
:check: After magnetizing effect zero , allow the data retain data
Magnetization of Ferromagnetism Material
:checkered_flag: the only magnetization with all same direction
moments
:checkered_flag: experienced same magnitude and they are ordered.
Explanation
Classical
The Weiss theory (Hw) , how Weiss molecular field proportional to magnetization of ferromagneetic material
:
Quantum
more accurate , since only specific angles of magnetic movement are allowed,
Temperature Dependence
:<3: Below Tc spins of a
ferromagnetic material are of the same magnitude, and well ordered.
:<3: Once Tc reached moments become randomly
aligned, meaning that the spin-coupling limit
:<3: above the Currie temperature it becomes
paramagnetic
