Curie’s law Magnetic thermometer Magnetic susceptibility Commentary

Pierre Curie metrology

Curie’s law

• The magnetization of a paramagnetic material
• is directly proportional to the strength
• of the exterior magnetic field and inversely
• proportional to the temperature of the material.
• What’s going on here? Pierre Curie discovered
• this effect and explained that paramagnetic bodies
• are like perfect gases . . . Ah . . .
• What the heck are perfect gases?
• I would have to guess—because it’s difficult
• to pick a path through a forest of equations—
• that magnetization results from particles in alignment
• but heat jiggles the particles out of skew.

Magnetic thermometer

• Curie’s law is the basis
• of the magnetic thermometer
• for measuring very low temperatures,
• not to be confused with
• a thermometer that has a magnetic mount.

Magnetic susceptibility

• All materials are either intrinsically magnetic
• or are susceptible to becoming diamagnetic or paramagnetic
• under the influence of an external magnetic field.
• Your magnetic susceptibility depends
• on the sum of the spins of your unpaired electrons
• or on the magnetic moments of your electron orbits.
• If all materials were strongly diamagnetic
• then your levitating vehicle could go anywhere.
• For a major investment, we seek to make this a reality.
• Your basic magnetic personality is totally
• orthogonal; that is, that has nothing to do with it, or,
• depending on your gullibility, is related to the percentage.