Polarized Conversion Electron Mossbauer Studies of Layered Ferroelectric Films

9310656金鲍尔铁电材料及其类似物中价态和结构行为的动力学研究将结合穆斯堡尔谱学和同步辐射进行探索。我们将考察结合高分辨率X射线吸收近边光谱和穆斯堡尔效应测量来阐明价态涨落行为的有效性。实验室中将使用偏振穆斯堡尔辐射源来描绘铁电相变附近的各向异性相互作用。基于同步加速器的穆斯堡尔时间域测量将被用来研究铁电材料中的非平衡行为，如光子感应态。%拟议的研究计划是探索性的，可能会对理解铁电材料和铁电行为产生重要影响。极化现象的研究涉及用于非易失性存储应用的铁电薄膜中的许多关键问题。这些材料及其类似物中的价态和结构行为的动力学将通过穆斯堡尔谱和同步辐射相结合来探索。实验室中将使用偏振穆斯堡尔辐射源来描绘铁电相变附近的各向异性相互作用。为了研究辐射感应态引起的非平衡行为，将在时间域进行基于同步加速器的穆斯堡尔测量。***

9310656 Kimball A study of the dynamics of valence and structural behavior in ferroelectric materials and their analogues will be explored by a combination of Mossbauer spectroscopy and synchrotron radiation. The efficacy of combining high resolution X-ray Absorption Near Edge Spectroscopy and Mossbauer effect measurements to clarify valence fluctuation behavior will be examined. Polarized Mossbauer radiation sources will be used in the laboratory to delineate anisotropic interactions near ferroelectric phase transitions. Synchrotron-based Mossbauer measurements in the time-domain will be made to study non-equilibrium behavior such as photon induced states in ferroelectric materials. %%% The proposed research program is of an exploratory nature and may have an important impact in providing new insights for the understanding of ferroelectric materials and ferroelectric behavior. The study of polarization phenomena is relevant to a number of critical problems in ferroelectric thin films for non- volatile memory applications. The dynamics of valence and structural behavior in these materials and their analogues will be explored by a combination of Mossbauer spectroscopy and synchrotron radiation. Polarized Mossbauer radiation sources will be used in the laboratory to delineate anisotropic interactions near ferroelectric phase transitions. Synchrotron-based Mossbauer measurements in the time-domain will be made to study non- equilibrium behavior caused by radiation-induced states. ***