Shape-induced magnetic anisotropy in dilute magnetic alloys

We extend the theory of the surface-induced magnetic anisotropy to mesoscopic samples with arbitrary geometry. The shape-induced anisotropy of impurity spins in small brick-shaped grains of dilute magnetic alloys is studied in detail. The surface-induced blocking of a magnetic-impurity spin is shown to be very sensitive to geometric parameters of a grain. This implies that the apparent discrepancy between the experimental data of different groups on the size dependence of the Kondo resistivity can result from different microstructure of the used samples. In order to interpret recent experimental data on the anomalous Hall effect in thin polycrystalline Fe doped Au films, we analyse the magnetisation of impurity spins as a function of the impurity position and of the grain shape.Comment: 10 pages, 6 figures, E-mail addresses: [email protected], [email protected], [email protected]

Developing & Marketing a JavaScript Support Extension for the srcML Infrastructure

This work describes the development of a JavaScript grammar file for the srcML infrastructure\u27s future parser generator, the many files used to test it, and the marketing plan used to market the JavaScript Support extension to industry software developers and potential collaborators

Spin-Orbit-Induced Magnetic Anisotropy for Impurities in Metallic Samples II. Finite Size Dependence in the Kondo Resistivity

The electrical resistivity including the Kondo resistivity increase at low temperature is calculated for thin films of dilute magnetic alloys. Assuming that in the non-magnetic host the spin-orbit interaction is strong like in Au and Cu, the magnetic impurities have a surface anisotropy calculated in part I. That anisotropy hinders the motion of the spin. Including that anisotropy the effective electron-impurity coupling is calculated by using the second order renormalization group equations. The amplitude of the Kondo resistivity contribution is reduced as the position of the impurity approaches the surface but the increase occurs approximately at the bulk Kondo temperature. Different proximity effects observed by Giordano are also explained qualitatively where the films of magnetic alloys are covered by pure second films with different mean free path. The theory explains the experimental results in those cases where a considerable amount of impurities is at the surface inside the ballistic region.Comment: 39 pages, RevTeX (using epsfig), 15 eps figures included, submitted to PR

The streets of New York city

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The effects of sunlight on bacteria

Citation: Blachly, Charles Dallas. The effects of sunlight on bacteria. Senior thesis, Kansas State Agricultural College, 1902.Morse Department of Special CollectionsIntroduction: Bacteria are one celled microscopic plants which reproduce by fission and are propagated by sporulation. In the evolutionary classification of plants they hold the following positions. Plant Kindgom, Sub Kingdom – Thallophyta, Division II – Euthallophyta or true thallophytes, Sub Division 1 – Schyomycetes, fission fungi or bacteria. As the above classification indicates the bacteria are supposed to be degenerate forms of fission plants, probably springing from the algae. Most of them being parasitic or saprophytic they have lost their power of photosynthesis, it in this degenerate form being no longer of use to them. Others of the nitrifying group derive their energy in an unknown way from certain mineral salts. As these plants gradually formed the saprophytic habit they lost the need of light to assist in forming starch. Those that burrowed into the interior of the medium in which they were growing were more protected from the external world than those living upon the surface. The result is their descendants which of course also inherited the tendency to leave the surface were more successful in the struggle for existence than those living upon the surface or exterior

Feelings Charts Instead of Behavior Charts: Radical Love Instead of Shame

In this article, the authors introduce some core concepts and language of Emotionally Responsive Practice at Bank Street , an approach to working with children developed based on deep knowledge of child development and a respect for children’s life experience (Koplow, 2002, 2007, 2009).https://educate.bankstreet.edu/gse/1000/thumbnail.jp

Estimating the Marginal Cost of Dam Removal

This paper reports the results from linear regression models that estimate the cost of dam removal as a function of the dam’s height and length. The models indicate that, on average, each vertical foot contributes between $22,331 and$30,620 to the cost of removal. These estimates are in line with the only other study we are aware of that estimates cost per foot. Although the models fail to account for potentially important variables, they may be useful for providing rough estimates of the variable portion of dam removal cost

Theory of magnetoresistance in films of dilute magnetic alloys

Earlier a magnetic anisotropy for magnetic impurities nearby the surface of non-magnetic host was proposed in order to explain the size dependence of the Kondo effect in dilute magnetic alloys. Recently Giordano has measured the magnetoresistance of dilute Au(Fe) films for different thicknesses well above the Kondo temperature $T_K$. In this way he verified the existence of that anisotropy even for such a case where the Kondo effect is not dominating. For detailed comparison of that suggestion with experiments, the magnetic field dependence of the magnetoresistance is calculated in the lowest approximation, thus in the second order of the exchange coupling. The strength of the anisotropy is very close to earlier estimates deduced from the size dependence of the Kondo resistivity amplitude.Comment: (11 pages, 8 figures, essential changes compared to the old version