Career Advancement Award: Ferromagnetic Resonance Studies of Single Crystal Magnetic Layered Structures

技术摘要：铁磁共振（FMR）方法将用于探测外延磁性多层膜的磁各向异性。将使用分子束沉积系统在Cu（100）种子层上生长面向100的Ni-Cu和Co-Cu超晶格，种子层沉积在端氢Si（100）衬底上。反射高能电子衍射和x射线衍射研究将用于确定优选的取向，应变和超晶格的周期性。将研究FMR的演变作为周期数的函数，以及作为磁性和非磁性层厚度的函数，以寻求对多层结构中观察到的多重共振起源的深入了解。非技术摘要：由于磁性多层膜在磁记录和读取（常规和磁光）以及传感器器件（磁阻和磁致伸缩）中的应用潜力，人们对磁性多层膜的生长和研究非常感兴趣。磁性多层结构提供了更多的自由来定制理想的磁性。本课题主要研究Ni-Cu和Co-Cu单晶磁性多层膜的制备及其磁性能的研究。超晶格的磁性能将作为磁性层和非磁性层的厚度以及它们的重复次数的函数来研究。＊＊＊

9321127 Naik Technical abstract: The ferromagnetic resonance (FMR) method will be used to probe the magnetic anisotropies of epitaxial magnetic multilayered films. 100 oriented Ni-Cu and Co-Cu superlattices will be grown using a molecular beam deposition system on a Cu (100) seed layer deposited on hydrogen terminated Si (100) substrates. Reflection high energy electron diffraction and x-ray diffraction studies will be used to determine the preferred orientation, strains and periodicity of the superlattice. Evolution of FMR as a function of the number of periods and also as a function of the thickness of the magnetic and nonmagnetic layers will be studied to seek an insight into the origin of multiple resonances observed in the multilayered structures. Non-technical abstract: There is much interest in the growth and study of magnetic multilayered films due to their potential for application in magnetic recording and reading (conventional and magneto-optic) and also in sensor devices (magnetoresistive and magnetostrictive). Magnetic multilayered structures provide more freedom to tailor desirable magnetic properties. The proposed research deals with the fabrication of single crystal magnetic multilayers of Ni-Cu and Co-Cu and study of their magnetic properties. Magnetic properties of the superlattices will be studied as function of the thickness of the magnetic and nonmagnetic layers as well as the number of their repetitions. ***