Theoretical Investigation on Induced Magnetic Moment by Impurity Potential

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概要

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• We have theoretically examined whether magnetic moment of 3d impurity such as Fe or Co can be induced or not in magnetic dilute alloy when atoms with high electronegativity such as halogen or oxygen ones are doped into nonmagnetic matrix. Based on the impurity Anderson model, we have analyzed the magnetic state in magnetic dilute alloys, considering that the effect of doping atoms can be regarded as the impurity potential. Using the mean field approximation, we evaluate the green function for d electrons. Through the self-consistent calculation with respect to the number of d electrons with spin ↑or ↓, it is disclosed that, although the initial state is non-magnetic, a magnetic moment can be induced by an impurity potential caused by doping atoms. In particular, when doped atoms have large electronegativity and/or there exists a strong Coulomb repulsive interaction between conduction electrons and doped atoms, magnetic moment is found to be easily induced from non-magnetic state.

• 社団法人日本物理学会の論文
• 2003-06-15

著者

• YAMADA Kosaku

  Department of Physics, Kyoto University

• Kondo S

  Ntt Opto‐electronics Lab. Atsugi‐shi Jpn

• Kondo S

  Institute For Chemical Research Kyoto University

• Kondo Shin-ichi

  Research Center For Development Of Far-infrared Region Fukui University

• Kondo S

  Department Of Materials Science And Engineering Nagasaki University

• KONDO Shin-ichiro

  Department of Materials Science and Engineering Faculty of Engineering, Nagasaki University

• Yamada Kosaku

  Department Of Mechanical Engineering Faculty Of Engineering Kagoshima University

• Kondo Shin-ichiro

  Department Of Electrical And Electronic Engineering Mie University

• Kondo Shinichiro

  Department of Materials Science and Engineering, Nagasaki University

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