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Studies Of Domain Dynamics In Amorphous Dy/Fe Multilayers, Roger D. Kirby, J.X. Shen, Z.S. Shan, David J. Sellmyer
Studies Of Domain Dynamics In Amorphous Dy/Fe Multilayers, Roger D. Kirby, J.X. Shen, Z.S. Shan, David J. Sellmyer
Roger Kirby Publications
Compositionally-modulated Dy/Fe films were prepared by dc magnetron sputtering onto glass substrates. For this series of samples, the Dy thickness was fixed at 5 Å, while the Fe thickness was varied from 4 to 6 Å. To study the magnetization reversal, the samples were first saturated. The magnetic field was then reversed to a value near the coercive field, and the Kerr rotation was measured as a function of time after reversal. We interpret our results in terms of the model of domain reversal first described by Fatuzzo for ferroelectrics. For some Fe thicknesses, we found that the reversal process …
Magneto-Optical Properties Of Mnbial Thin Films, J. X. Shen, Roger D. Kirby, David J. Sellmyer, Y. J. Wang
Magneto-Optical Properties Of Mnbial Thin Films, J. X. Shen, Roger D. Kirby, David J. Sellmyer, Y. J. Wang
Roger Kirby Publications
Mn-Bi-Al thin films. were produced by sequential evaporation of the constituents, followed by an anneal at 300 °C. The temperature and composition dependencies of the Kerr rotation angle, absolute reflectivity, and magnetic anisotropy were measured. The results show that, up to 30 at. % Al concentration, the thin films retain the pure MnBi hexagonal structure. Further, for suitable Al content, the films have the same large Kerr rotation as MnBi. Pure MnBi films exhibit perpendicular anisotropy at room temperature and in-plane anisotropy for temperatures below 142 K. In contrast,. the Al-doped films prepared here have perpendicular anisotropy down to at …
Magneto-Optic Properties Of Uranium-Based Compounds, Roger D. Kirby, J. X. Shen, John A. Woollam, David J. Sellmyer
Magneto-Optic Properties Of Uranium-Based Compounds, Roger D. Kirby, J. X. Shen, John A. Woollam, David J. Sellmyer
Roger Kirby Publications
Uranium-based compounds often show interesting magnetic properties and large polar Kerr rotations. Because of this, the wavelength and temperature dependencies of the polar Kerr rotation in several uranium-based compounds, including UMn2Ge2, UFe2, and UGa2, have been investigated. The Mn moments order ferromagnetically in UMn2Ge2 below 380 K, and while the U moments do not order ferromagnetically until the temperature is below 150 K. The measurements presented here show that the size of the Kerr rotation increases from 0.05° at room temperature to 0.15° when the U moments are ordered. …