• Comparison of Liquid-Gaz and para-ferromagnetic transtions:

–different origin of phase transitions…

– but similar behavior

• Liquid-Gaz: (P,V,T)

• Para-ferromagnetic: (B,M,T)

• isotherm :

Universal features of phase transition

V

P

B

M

T > Tc

G

L

T < Tc

T = Tc

P

VL VG

• Comparison of Liquid-Gaz and para-ferromagnetic transtions:

Universal features of phase transition

V

P

B

M

T > Tc

G

L

T < Tc

T = Tc

P

VL VG

T

P

Tc

L

G

Critical point

T

B

Tc

Ferro Para

• Comparison of Liquid-Gaz and para-ferromagnetic transtions:

Universal features of phase transition

V

P

B

M

T > Tc

G

L

T < Tc

T = Tc

P

VL VG

T

V

Tc

L

G

T

M

Tc

Ferro Para

• Comparison of Liquid-Gaz and para-ferromagnetic transtions:

• susceptibility

Gaz / Liquid Para-ferromagnetic

Universal features of phase transition

T

Tc

TT P

V

V

1κχ

compressibility

Tom B

Mμχ

magnetic susceptibility