Determination of the Effective Masses of the Electron Jack, Hole Octahedron, and Ellipsoids of Molybdenum by Cyclotron Resonance Measurements

The anisotropic behaviour of the effective masses in the {100} plane in molybdenum was determined by cyclotron resonance measurements. The authors succeeded in measuring resonances from all parts of the Fermi surface — electron jack, hole octahedron, and hole ellipsoids — with effective masses between μ = 3.9 and μ = 0.4. From the cut‐off angles of the different resonances and the behaviour of the corresponding effective masses as a function of the angle between the magnetic field and the [011] axis, conclusions could be drawn as to details of the Fermi surface. The mean velocity on the hole octahedron was estimated. The measurements were made at f = 9.25 GHz and T = 1.6 °K, the vector of the high‐frequency current being parallel to the [011] axis.