Colleen S. Frazer

UNIT CELL EXPANSION IN ErT2 FILMS

XRD analysis of plasma-vapor-deposited ErT2 films during aging (T decay to 3 He) reveals an hkl-dependent unit-cell expansion in which (200) grains expand out-of-plane as much as 0.01 A more than (111) out-of-plane grains. Texture analysis of an aged ErT2 film reveals a bimodal (111)/(200) out-of-plane preferred orientation. Sin 2 ψ analysis reveals significant in-plane macrostrain due to 3 He formation/growth. The mechanistic origins regarding these observations are also discussed.

Stress creation during Ni–Mn alloy electrodeposition

The stress evolution during electrodeposition of NiMn from a sulfamate-based bath was investigated as a function of Mn concentration and current density. The NiMn stress evolution with film thickness exhibited an initial high transitional stress region followed by a region of steady-state stress with a magnitude that depended on deposition rate, similar to the previously reported stress evolution in electrodeposited Ni [S. J. Hearne and J. A. Floro, J. Appl. Phys. 97, 014901–1 (2005)]. The incorporation of increasing amounts of Mn resulted in a linear increase in the steady-state stress at constant current density. However, no significant changes in the texture or grain size were observed, which indicates that an atomistic process is driving the changes in steady-state stress. Additionally, microstrain measured by ex situ x-ray diffraction increased with increasing Mn content, which was likely the result of localized lattice distortions associated with substitutional incorporation of Mn and∕or increased t...

Three-dimensional interactive Data Language pole figure visualization

The Interactive Data Language has been used to produce a software program capable of advanced three-dimensional visualizations of pole figure and θ -2 θ data. The data can also be used to calculate quantitative properties such as strain level and to minimize the peak-height texture effects in individual θ -2 θ scans. The collection of the large data sets necessary for the analyses is facilitated by use of a position sensitive detector or area detector.