Explain curie law in details

Pierre curie experimentally found that magnetization of a paramagnetic sample is directly proportional to the magnitude of applied external magnetic field

\(\begin{array}{l}left( {{overrightarrow{B}}_{ext}} right)\end{array} \)
and inversely proportional to Temperature (T)

\(\begin{array}{l}Mpropto {{overrightarrow{B}}_{ext}}\end{array} \)

\(\begin{array}{l}Mpropto frac{1}{T}\end{array} \)

\(\begin{array}{l}M=Cfrac{{{overrightarrow{B}}_{ext}}}{T}…(1)\end{array} \)

This is known as curie’s law

C – is curie constant

\(\begin{array}{l}{{overrightarrow{B}}_{ext}}\end{array} \)
– is applied external field

T – Temperature

 

Curve: For a paramagnetic material M/Mex versus Bext/T

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