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
