Negative Magnetoresistivity of ErBi and Its Crystal-Field Levels  

作　　者：刘照森 Divis Martin Sechovsky Vladimir 

机构地区：[1]Faculty of Mathematics and Physics, Nanjing University of Information Science and Technology, Nanjing 210044 [2]Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 121 16 Prague 2, Czech Republic

出　　处：《Chinese Physics Letters》2009年第1期268-271,共4页中国物理快报（英文版）

基　　金：Supported by the Natural Science Foundation of Jiangsu Province under Grant No BK2008438, and the Research Plan MSM of the Ministry of Education of the Czech Republic under Grant No 0021620834.

摘　　要：A theoretical approach is generalized and employed in this work to evaluate the magnetoresistivity of ErBi in external magnetic fields. The calculated results and theoretical analyses show that when an external magnetic field is applied in the z-direction, the magnetoresistivity can be reduced considerably due to the degeneracy lifting of the crystal-field levels. However, when the magnetic field is exerted along the x-axis, the magnetoresistivity will be increased because of the formations of new magnetic states of the Er ion and its transitions within and between these new states.A theoretical approach is generalized and employed in this work to evaluate the magnetoresistivity of ErBi in external magnetic fields. The calculated results and theoretical analyses show that when an external magnetic field is applied in the z-direction, the magnetoresistivity can be reduced considerably due to the degeneracy lifting of the crystal-field levels. However, when the magnetic field is exerted along the x-axis, the magnetoresistivity will be increased because of the formations of new magnetic states of the Er ion and its transitions within and between these new states.

关 键 词：field emission molybdenum dioxide enhancement factor 

分 类 号：O469[理学—凝聚态物理] O48[理学—电子物理学]