Physics · Magnetism and Matter

A sample of paramagnetic salt contains 2 × 1024 atomic dipoles, each with a dipole moment of 1.5 × 10-23 J T-1. The sample is placed under a homogeneous magnetic field of 0.6 T and cooled to a temperature of 4.2 K. The degree of magnetic saturation achieved is 20%. Find the total dipole moment of the sample for a magnetic field of 0.9 T and a temperature of 2.8 K (assuming Curie's Law holds).