THE FERMI SURFACE OF LEAD

Thesis/Dissertation · Thu Nov 01 04:00:00 EST 1962

OSTI ID:4085314

Anderson, J R; Gold, A V

Knowledge of the Fermi surface is one of the most important requirements for understanding the properties of a metal. A very powerful tool for studying this surface is the de Haas-van Alphen effect, the oscillations in the magnetic susceptibility with magnetic field found in metal singie crystals at very low temperatures. The de Haas-van Alphen effect in lead was previously studied using pulsed magnetic fields up to a maximum of 80 kG. The results indicated that the Fermi surface was much like a freeelectron surface, and that valuable additional information should become available by extending the measurements to higher fields. An apparatus was designed and constructed to extend the magnetic fields to 200 kG. With the aid of these higher fields many new features of the Fermi surface in lead were quantitatively determined. The shape of the Fermi surface can be well explained in terms of an orthogonalized-plane-wave model using only two parameters, the two Fourier components of the pseudopotential, V/sub 111/ and V/sub 200. While the orthogonalized-plane-wave approach is successful in describing the shape of the Fermi surface, the calculated cyclotron masses are too small by a factor of order two. The theoretical implications of this are discussed briefly. The de Haas-van Alphen oscillations were observed in iron whiskers. This is the first time that the effect was observed in a ferromagnetic metal. Preliminary results show that the saturation magnetization in iron must be taken into account in order to determine the true periods of the oscillations. (auth)

• Research Organization: Ames Lab., Ames, Iowa
• DOE Contract Number: W-7405-ENG-82
• NSA Number: NSA-18-014464
• OSTI ID: 4085314
• Report Number(s): IS-762
• Country of Publication: United States
• Language: English

Related Subjects

CRYOGENICS
CYCLOTRONS
DE HAAS-VAN ALPHEN EFFECT
DIAMAGNETISM
ENERGY LEVELS
FERMI GAS
FERMI LEVEL
FERMIONS
FERROMAGNETIC MATERIALS
FOURIER ANALYSIS
IRON
LEAD
LOW TEMPERATURE
MAGNETIC FIELDS
MAGNETISM
MASS
MATHEMATICS
METALS, CERAMICS, AND OTHER MATERIALS
MONOCRYSTALS
OSCILLATIONS
PLANNING
PULSES
SUSCEPTIBILITY