PlanetPhysics/Auxiliary Field H

The auxiliary [[../CosmologicalConstant2/|field]], {\mathbf H} is defined from the [[../NeutrinoRestMass/|magnetic field]] {\mathbf B}, the [[../MagneticInductionVector/|magnetization]] {\mathbf M} and the permeability of free space ${\mu }_0$.

$𝐇=\frac{𝐁}{{\mu }_0}-𝐌$

Confusion sometimes arises because the {\mathbf H} field was named the magnetic field or magnetic field intensity in the past, while {\mathbf B} was denoted as the magnetic [[../AbsoluteMagnitude/|flux]] density or magnetic induction. Similar to [[../Thermodynamics/|Thermodynamics]], where we can talk about macroscopic phenomenon and solve problems without dealing with microscopic properties, the {\mathbf H} field is a macroscopic field like the electric displacement {\mathbf D}.

{\mathbf References}

[1] Magnetic field, Wikipedia

[2] Jackson, D. "Classical Electrodynamics", John Wiley and Sons, Inc., 1975.

[3] Griffiths, D. "Introduction to Electrodynamics", Prentice-Hall, Inc., 1999.