X-Ray-Reflectivity-Based Structural Analysis of a Spin-Valve Film

Accuracy in x-ray reflectivity analysis

The influence of Poisson noise on the accuracy of x-ray reflectivity analysis is studied with an aluminium oxide (AlO) layer on silicon. A null hypothesis which argues that other than the exact solution gives the best fitness is examined with a statistical p-value test using a significance level of α = 0.01. Simulations are performed for a fit instead of a measurement since the exact error caus...

Magnetic X-ray Reflectivity

Investigation of dip coated ZnO thin film : X - ray reflectivity and Fourier analysis

: In this study we fabricated Zinc Oxide thin film by sol-gel dip coating method on glass substrate. X-ray reflectivity (XRR) and its optimization have been used for characterization and extracting physical parameters of the film. Genetic Algorithm (GA) has been applied for this optimization process. Independent information was exploited from Fourier transform of Fresnel reflectivity normalized...

X-Ray and Neutron Reflectivity

re = 2.818 × 10−15m is the classical electron radius, ρe is the electron density of the material, and μx is the absorption length. With δ > 0 we find that n < 1, which leads to the phenomenon of so-called total external reflection for incident angles αi below the critical angle αc = √ 2δ. Typical values for δ are 10−5 . . . 10−6, and thus αc is in the range of 0.1 ◦ . . . 0.5◦. For simplicity, ...

Interactive, Web-Based Calculator of Neutron and X-ray Reflectivity

For many users of the neutron and X-ray reflectometry instruments at NIST, these measurements represent a relatively small and specialized part of their research portfolio. As such, providing calculation and modeling tools that are as accessible and easy-to-use as possible is a high priority of the facility. In order to meet this need, a purely web-browser-based calculator for reflectivity mode...