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FERRIMAGNETISM (HAZIQAH 4 SSCZ) - Coggle Diagram
FERRIMAGNETISM (HAZIQAH 4 SSCZ)
Introduction
:check: exhibit a spontaneous magnetic
moment
:check: behave paramagnetically above the Tc
:check:a combination of ferromagnetism
and antiferromagnetism
:check: hysteresis below their Curie temperature, 𝑇c
:check: magnetic moments align antiparallel to one another
:check: net magnetic moment is non-zero
:check: widely used in non-volatile memory devices
Ferrimagnetic Materials
:red_flag: ceramics, in particular, ceramic oxides
:red_flag: technological devices are materials known
as ferrites
:red_flag: often prepared by standard ceramic processing techniques
Magnetization of Ferrimagnetic material
:star: spontaneous magnetization
:check: different numbers of unpaired electrons
:check: result do not cancel one another out
:star: a net magnetic moment in the down spin direction
:star: contain magnetic moments aligned antiparallel
to one another
:star: The antiparallel magnetic moments
:check: explained by the super-exchange
behavior that occurs in oxide materials
:star: ferrites
:check: known as an inverse spinel
structure
:check: crystal structure consisting of two
sublattices
:star: the numbers of magnetic ions on each of the sublattices have to be different
:check: not all magnetic moments are canceled out
:star: molecular field constant
:star: Arrangement of magnetic moments
Temperature Dependence
:!: at Tc it become randomized and become paramagnetic
:!: before Tc material decreases with increasing temperature.
:!: above Tc , indicates a further
decrease in magnetization
