Accession Number : AD0830045

Title :   THE HALL COEFFICIENT OF INDIUM IN THIN EVAPORATED FILMS.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Dyer, Thomas Edward ; Tsantes, George, Jr

Report Date : DEC 1967

Pagination or Media Count : 70

Abstract : The Hall coefficient has been measured at liquid helium temperatures in the magnetic field range of 0.08-3.8 kilogauss for evaporated indium films with thicknesses between 900 and 2,500 Angstroms. For all films studied the Hall coefficient was positive; there was no sign reversal of the type observed in some rolled films at low magnetic fields. The coefficients obtained were slightly smaller than those previously reported for bulk films at comparable values of reduced magnetic field. Below the superconducting critical temperature in the weak-field region a large and unexpected transverse potential difference, independent of magnetic field direction, was observed. As the magnetic field was increased, this potential difference reversed sign and underwent damped, aperiodic oscillations in some samples. However, in the higher-field region a normal Hall voltage was present, and the Hall coefficient was in good agreement with the data above the critical temperature. (Author)

Descriptors :   *HALL EFFECT), (*INDIUM, MAGNETIC FIELDS, METAL FILMS, CRYOGENICS, PERIODIC VARIATIONS, TRANSITION TEMPERATURE, SUPERCONDUCTIVITY, BAND THEORY OF SOLIDS, VAPOR PLATING, VACUUM APPARATUS, DAMPING, THESES.

Subject Categories : Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE