Manganese-doped CdGeAs sub(2, ZnGeAs) sub(2) and ZnSiAs sub(2 chalcopyrites: A new materials for spintronics)
Based on Mn-doped chalcopyrites CdGeAs sub(2, ZnGeAs) sub(2) and ZnSiAs sub(2 the new dilute magnetic semiconductors with p-type conductivity were produced. Magnetization, electrical resistivity, magnetoresistance and Hall effect of mentioned compositions were studied. Their curves of temperature de...
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| Veröffentlicht in: | Journal of magnetism and magnetic materials 2011-12, Vol.323 (23), p.2923-2928 |
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| container_issue | 23 |
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| container_title | Journal of magnetism and magnetic materials |
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| creator | Koroleva, LI Zashchirinskii, D M Khapaeva, T M Morozov, AI Marenkin, S F Fedorchenko, I V Szymczak, R |
| description | Based on Mn-doped chalcopyrites CdGeAs sub(2, ZnGeAs) sub(2) and ZnSiAs sub(2 the new dilute magnetic semiconductors with p-type conductivity were produced. Magnetization, electrical resistivity, magnetoresistance and Hall effect of mentioned compositions were studied. Their curves of temperature dependence of magnetization have the similar form in spite of complicated character, for which the concentration and mobility of the charge carriers are responsible. Thus, for T15 K, these curves are characteristic for superparamagnetics and for T15 K for a frustrated ferromagnetics. In compounds with Zn these two states dilute by spinglass-like state. This specific feature is assigned to an attraction of Mn ions occupying neighboring sites and to the competition between the carrier-mediated exchange and superexchange interactions. Curie temperatures of these compounds are above room temperature. These are the highest Curie temperatures in the A) super(I)IB super(IVC) super(V) sub(2:Mn systems.) |
| doi_str_mv | 10.1016/j.jmmm.2011.05.054 |
| format | Article |
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Magnetization, electrical resistivity, magnetoresistance and Hall effect of mentioned compositions were studied. Their curves of temperature dependence of magnetization have the similar form in spite of complicated character, for which the concentration and mobility of the charge carriers are responsible. Thus, for T15 K, these curves are characteristic for superparamagnetics and for T15 K for a frustrated ferromagnetics. In compounds with Zn these two states dilute by spinglass-like state. This specific feature is assigned to an attraction of Mn ions occupying neighboring sites and to the competition between the carrier-mediated exchange and superexchange interactions. Curie temperatures of these compounds are above room temperature. 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Magnetization, electrical resistivity, magnetoresistance and Hall effect of mentioned compositions were studied. Their curves of temperature dependence of magnetization have the similar form in spite of complicated character, for which the concentration and mobility of the charge carriers are responsible. Thus, for T15 K, these curves are characteristic for superparamagnetics and for T15 K for a frustrated ferromagnetics. In compounds with Zn these two states dilute by spinglass-like state. This specific feature is assigned to an attraction of Mn ions occupying neighboring sites and to the competition between the carrier-mediated exchange and superexchange interactions. Curie temperatures of these compounds are above room temperature. 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| ispartof | Journal of magnetism and magnetic materials, 2011-12, Vol.323 (23), p.2923-2928 |
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| language | eng |
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| source | ScienceDirect Journals (5 years ago - present) |
| subjects | Chalcopyrites Curie temperature Dilution Ferromagnetism Magnetization Manganese Resistivity Temperature dependence |
| title | Manganese-doped CdGeAs sub(2, ZnGeAs) sub(2) and ZnSiAs sub(2 chalcopyrites: A new materials for spintronics) |
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