计算物理 ›› 2008, Vol. 25 ›› Issue (1): 97-100.

• 研究论文 • 上一篇    下一篇

Fen/Crn超晶格磁性和电子结构的第一性原理研究

李恒帅1, 胡海泉2, 任忠民1, 崔守鑫2   

  1. 1. 聊城大学汽车与交通工程学院, 山东 聊城 252059;
    2. 聊城大学物理科学与信息工程学院, 山东 聊城 252059
  • 收稿日期:2006-07-28 修回日期:2007-01-07 出版日期:2008-01-25 发布日期:2008-01-25
  • 作者简介:李恒帅(1980-),male,Xintai,Shandong,Master,Research in material modeling.
  • 基金资助:
    Supported by the HI-TECH Research and Development Program of China(No.2004AA32G090);the Science Foundation for Distinguished Young Scientist of Shandong Province(No.02BS050);the Natural Science Foundation of Shandong Province(No.Y2006A02)

First Principle Study of Magnetism and Electronic Structure of Fen/Urn Superlattices

LI Hengshuai1, HU Haiquan2, REN Zhongmin1, CUI Shouxin2   

  1. 1. College of Auto and Traffic Engineering, Liaocheng University, Liaocheng 252059, China;
    2. College of Physics Science & Information Engineering, Liaocheng University, Liaocheng 252059, China
  • Received:2006-07-28 Revised:2007-01-07 Online:2008-01-25 Published:2008-01-25
  • Supported by:
    Supported by the HI-TECH Research and Development Program of China(No.2004AA32G090);the Science Foundation for Distinguished Young Scientist of Shandong Province(No.02BS050);the Natural Science Foundation of Shandong Province(No.Y2006A02)

摘要: 采用基于密度泛函原理的全势线性缀加平面波方法(FLAPW),计算了超晶格Fen/Crn(n=1,3,5)的电子结构和磁性,结果表明铁磁耦合状态是基态,铁层的磁矩由于铬层的加入而有一些变化,铁层的磁矩随着n的增大而逐渐增强.铬层的磁矩的方向是正负相间变化的,相邻的铁层和铬层之间是反铁磁性耦合的,铁原子的d轨道和铬原子的d轨道在费米能附近有中等程度的杂化.

关键词: 电子结构, 磁性, 全势线性缀加平面波方法(FLAPW)

Abstract: Electronic structure and magnetism of Fen/Crn superlattices(SL) with various layer thickness(n=1,3,5) are studied using a full-potential linearized augmented plan-wave(FLAPW) method within a density functional formalism. It is shown that ferromagnetic state is a preferable phase in the ground state and the intrinsic spin density wave length is about 2 monolayers(ML). The magnetic moment of Fe layer is slightly modified by an intelvening Cr layer, and becomes stronger with the increase of n. The direction of Cr magnetic moment alternates layer by layer. An antiferromagnetic coupling hetween interfacial Fe and Cr layers is observed. There is a moderate hybridization between d-states of Fe and Cr atoms near Fermi energy.

Key words: electronic structure, magnetism, full-potential linerized augmented plan-wave(FLAPW)

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