Giant magnetic moments in dilute magnetic semiconductors
The concentration dependence of the specific magnetic moment value at room temperature in dilute semiconductor titanium oxides doped with either Co or Fe has been investigated. This value was found to increase sharply at small concentrations of magnetic impurity. The magnetic moment of 22.9 μ B per...
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Published in | Journal of magnetism and magnetic materials Vol. 320; no. 6; pp. 895 - 897 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
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Elsevier B.V
01.03.2008
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Abstract | The concentration dependence of the specific magnetic moment value at room temperature in dilute semiconductor titanium oxides doped with either Co or Fe has been investigated. This value was found to increase sharply at small concentrations of magnetic impurity. The magnetic moment of 22.9
μ
B per impurity atom has been revealed for TiO
2 doped with 0.15
at% Co, not yet reported in any semiconductor oxide systems. We conclude the observed giant magnetic moments are caused by the crystal lattice polarization at small impurity concentrations. The comparison with published data point to different types of the magnetization concentration dependence for various semiconductor matrixes that is probably related to the dielectric permittivity of the environment. |
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AbstractList | The concentration dependence of the specific magnetic moment value at room temperature in dilute semiconductor titanium oxides doped with either Co or Fe has been investigated. This value was found to increase sharply at small concentrations of magnetic impurity. The magnetic moment of 22.9
μ
B per impurity atom has been revealed for TiO
2 doped with 0.15
at% Co, not yet reported in any semiconductor oxide systems. We conclude the observed giant magnetic moments are caused by the crystal lattice polarization at small impurity concentrations. The comparison with published data point to different types of the magnetization concentration dependence for various semiconductor matrixes that is probably related to the dielectric permittivity of the environment. The concentration dependence of the specific magnetic moment value at room temperature in dilute semiconductor titanium oxides doped with either Co or Fe has been investigated. This value was found to increase sharply at small concentrations of magnetic impurity. The magnetic moment of 22.9muB per impurity atom has been revealed for TiO2 doped with 0.15at% Co, not yet reported in any semiconductor oxide systems. We conclude the observed giant magnetic moments are caused by the crystal lattice polarization at small impurity concentrations. The comparison with published data point to different types of the magnetization concentration dependence for various semiconductor matrixes that is probably related to the dielectric permittivity of the environment. |
Author | Yarkin, D.G. Perov, N.S. Konstantinova, A.S. Balagurov, L.A. Orlov, A.F. |
Author_xml | – sequence: 1 givenname: A.F. surname: Orlov fullname: Orlov, A.F. email: rmdp@girmet.ru organization: Institute for Rare Metals, Moscow 119017, Russian Federation – sequence: 2 givenname: L.A. surname: Balagurov fullname: Balagurov, L.A. organization: Institute for Rare Metals, Moscow 119017, Russian Federation – sequence: 3 givenname: A.S. surname: Konstantinova fullname: Konstantinova, A.S. organization: Department of Physics, Moscow State University, Moscow 119992, Russian Federation – sequence: 4 givenname: N.S. surname: Perov fullname: Perov, N.S. organization: Department of Physics, Moscow State University, Moscow 119992, Russian Federation – sequence: 5 givenname: D.G. surname: Yarkin fullname: Yarkin, D.G. organization: Institute for Rare Metals, Moscow 119017, Russian Federation |
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Cites_doi | 10.1063/1.2193431 10.1063/1.1525397 10.1063/1.2399939 10.1063/1.2378398 10.1103/PhysRevLett.91.077205 10.1103/PhysRevLett.93.177206 10.1016/S0040-6090(02)00709-5 10.1016/j.jmmm.2006.02.038 10.1103/PhysRevLett.94.037205 10.1103/PhysRevB.67.115211 10.1016/j.jmmm.2006.05.014 10.1063/1.1703848 10.1134/1.1996746 |
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SubjectTerms | Dilute magnetic semiconductor Giant magnetic moment Oxide semiconductor |
Title | Giant magnetic moments in dilute magnetic semiconductors |
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