Further investigation of the Hall effect and specific resistance in thin films of iron, cobalt, nickel , palladium, and platinum give the following results: (1) the specific resistances of films deposited on a cool surface range from 4 to 30 times the accepted values for the corresponding bulk metals; (2) the Hall coefficients for the paramagnetic metals palladium and platinum are slightly smaller than bulk values: (3) the Hall coefficients for iron, cobalt, and nickel deposited on a cool surface are respectively 1.8 times, 5 times, and 7 times, the bulk values; (4) heating films of iron, cobalt, and nickel during deposition causes both the Hall coefficients and specific resistances to decrease almost to bulk values; (5) saturation of the Hall effect occurs for iron at a slightly lower magnetic field than for bulk values, for cobalt at 12500 as compared with 13500 for bulk, and for nickel at 2500 as compared with 6000 for bulk; and (6) microscopic investigation of nickel and cobalt shows some evidence of crystal structure.
Proceedings of the Iowa Academy of Science
©1925 Iowa Academy of Science, Inc.
Peacock, H. B.
"Hall Effect and Specific Resistance in Thin Evaporated Film of Fe, Co, Ni, Pd, and Pt,"
Proceedings of the Iowa Academy of Science, 32(1), 382-382.
Available at: https://scholarworks.uni.edu/pias/vol32/iss1/85