De Haas-van Alphen effect

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The de Haas–van Alphen effect, often abbreviated to dHvA, was discovered in 1930 by Wander Johannes de Haas and PM van Alphen.

The The dHvA effect is a quantum mechanical effect and is due to Landau quantization of electron energy in an applied magnetic field. This effect has been studied in the context of a two-dimensional gas.

This effect can be used to study the external cross section of the Fermi surface of a metal.