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Full-Text Articles in Physics

Generalization Of Hysteresis Modeling To Anisotropic Materials, A. Ramesh, David C. Jiles, Y. Bi Apr 1997

Generalization Of Hysteresis Modeling To Anisotropic Materials, A. Ramesh, David C. Jiles, Y. Bi

Materials Science and Engineering Publications

An extension to the model of hysteresis has been presented earlier which included the effect of anisotropy in the modeling of the anhysteretic magnetization curves of uniaxially anisotropic single crystalline materials. Further exploration of this extension shown here considers different kinds of crystal anisotropy in materials. Theory considers that the differential susceptibility at any given field is determined by the displacement of the prevailing magnetization from the anhysteretic magnetization. Thus, it has been shown that the effect of anisotropy on magnetic hysteresis in materials can be incorporated into the model of hysteresis through the anisotropic anhysteretic. This extension is likely ...


Structure And Stability Of The Twofold Surface Of Icosahedral Al-Pd-Mn By Low-Energy Electron Diffraction And X-Ray Photoemission Spectroscopy, Z. Shen, Cynthia J. Jenks, James W. Anderegg, D. W. Delaney, Thomas A. Lograsso, Patricia A. Thiel, A. I. Goldman Feb 1997

Structure And Stability Of The Twofold Surface Of Icosahedral Al-Pd-Mn By Low-Energy Electron Diffraction And X-Ray Photoemission Spectroscopy, Z. Shen, Cynthia J. Jenks, James W. Anderegg, D. W. Delaney, Thomas A. Lograsso, Patricia A. Thiel, A. I. Goldman

Ames Laboratory Publications

We have used low-energy electron diffraction and x-ray photoemission spectroscopy to investigate the structure of the twofold surface of icosahedral Al-Pd-Mn. The regrowth of the surface by annealing after sputtering took place in two distinct stages. The first stage was the appearance of a fine-grained surface phase with icosahedral, or near-icosahedral, symmetry. For higher annealing temperatures (above 800 K) a bulk terminated face-centered icosahedral surface was observed.