Ab initio determination of Kerr angles in Cu4Ni8CunNi9∕Cu(100) (n=2–10)

作     者：I. Reichl R. Hammerling A. Vernes P. Weinberger C. Sommers L. Szunyogh 

作者机构：Center for Computational Material Science Vienna University of Technology Getreidemarkt 9/134 A-1060 Vienna Austria and Department of Theoretical Physics and Center for Applied Mathematics and Computational Physics Budapest University of Technology and Economics Budafoki út 8 H-1521 Budapest Hungary 

出 版 物：《Physical Review B》 (Phys. Rev. B Condens. Matter Mater. Phys.)

年 卷 期：2004年第70卷第21期

页      面：214417-214417页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：Austrian Science Foundation, (GZ 45.531, Zl 98.366) Hungarian National Science Foundation Technisches Abkommen Austria-Hungary, (A-3/03) Hungarian Scientific Research Fund, OTKA 

摘      要：Calculated polar magneto-optic Kerr rotation and ellipticity angles are presented for the system Cu4Ni8CunNi9∕Cu(100), n=2,…,10. Contrary to the common belief, the Kerr signals are found to be not directly proportional to the total magnetic moment. It will be shown that in order to assign at least indirectly the size (and sign) of the Kerr angles and therefore the type of coupling to a kind of total magnetic moment, one has to consider weighted layer-resolved moments, e.g., weighted by the damping factors of the reflected waves. As to be expected the occurring oscillations in the Kerr angles with respect to the spacer thickness resemble closely those for the interlayer exchange coupling energy.