The effects of phosphorus on the magnetization of nickel have been examined for thin films made by electroless deposition, electrodeposition, and by vacuum evaporation. While P has a very low solubility in bulk nickel, the results indicate that all three processes result in a metastable solid solution of P in Ni, which is transformed into the stable (paramagnetic Ni3P plus Ni) configuration by annealing at 850°K. The concentrations of P in the deposited films were varied and quantitatively established through the use of NaH232PO2 in the deposition process, coupled with radio-analysis techniques. The magnetic data obtained are in qualitative agreement with z=5 in the expression, μB=n0−cz, where n0 is the number of holes in the 3d band of nickel, c is the concentration of phosphorus, and z its valence. Data on the behavior of magnetic moment and Curie temperature with P content are presented and a tentative explanation put forth for some anomalous behavior of these parameters.

Measurements were made of the magnetostriction and anisotropy in oriented polycrystals of MnBi at various temperatures between 77–300°K. The magnetostriction constants in a four-constant expression have been evaluated as a function of temperature, and the first three anisotropy constants also have been estimated. At least at the lower temperatures, it is found that all three constants are necessary to fit the anisotropy data.

A helical anisotropy film is characterized by the induced anisotropy of the form K sin2[π(z)−2πz/d], where K is the anisotropy constant, θ is the magnetization orientation, z is the coordinate along the direction of film thickness, and d is the film thickness. It has been predicted by solving Euler's equation that for film thickness greater than the critical value 2π(A/K)½ (A=exchange constant), stable states may occur in which the magnetization orientation θ follows approximately the helical variation of the easy axis. The magnetic characteristics of a helical film can be clearly demonstrated by the M-H loops of the top or bottom layers, as obtainable with a Kerr magneto-optic apparatus. The transitions from a saturated state to a helical state and from one helical state to another result in multiple-threshold M-H loops. Nonmagnetostrictive Permalloy films have been electroplated onto a slowly rotating substrate in the presence of a dc orienting field. Samples of 3 μ or more thickness show the helical anisotropy characteristics while a sample of less than 0.5-μ thickness behaves as a uniaxial film. Furthermore, control samples of each thickness have also been electroplated on a stationary substrate. They only show the usual uniaxial anisotropy property.

One contributing factor in the nonattainment of proper boron concentrations in borophosphosilicate glass films is the variability of the diborane concentration in gas mixtures used in the process. We describe an analytical procedure that allows the monitoring of small changes in diborane concentrations utilizing an internal reference standard in the gas mixture. Employing this procedure, the decomposition kinetics of diborane mixtures prepared in steel cylinders with concentrations of less than 10% was investigated. The rate law for the decomposition of diborane in these mixtures follows the rate law observed for pure diborane d (B2Hs) _ k (B2Hs) ~5 dtwhere k at 20~ was 1.0 • 10 -3 mole -~/2 1 u2 day-1.

Cube oriented, (100) [001], iron silicon alloys have been prepared in thickness ranging from 0.8 mil to 11.0 mils. Both ac and dc magnetic properties are given for the alloys. The data show that comparable properties to commercial singly oriented steel of the (110) [001] texture are obtained both parallel and perpendicular to the rolling direction. The magnetic properties are sensitive to both the amount of cube oriented grains and the distribution of the directions about the rolling direction of the sheet.