Structure-Dependent Magnetoresistance in the Zn0.1Cd0.9GeAs2 + MnAs Hybrid Nanocomposite
| Autor: | I. V. Fedorchenko, T. R. Arslanov, Lukasz Kilanski, R. K. Arslanov, Tapan Chatterji |
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| Rok vydání: | 2018 |
| Předmět: |
Nanocomposite
Materials science Physics and Astronomy (miscellaneous) Magnetoresistance Magnetic moment Condensed matter physics Solid-state physics Scattering Field dependence 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Electron transport chain Phase (matter) 0103 physical sciences 010306 general physics 0210 nano-technology |
| Zdroj: | JETP Letters. 107:612-617 |
| ISSN: | 1090-6487 0021-3640 |
| Popis: | The effect of high pressure on electron transport and on the field dependence of the transverse magnetoresistance has been studied in a hybrid nanocomposite based on the Zn0.1Cd0.9GeAs2 matrix and MnAs clusters. A record high negative magnetoresistance of ~74% is formed near a pressure-induced structural transition (P≈ 3.5 GPa). The considered scattering mechanisms include both the contribution from MnAs clusters at relatively low pressures (up to 0.7 GPa) and spin-dependent scattering by localized magnetic moments in the Mn-substituted structure of the matrix in the region of the structural transition. The presence of the positive magnetoresistance region associated with the two-band transport model in the high-pressure phase, as well as the large negative magnetoresistance, is described in the framework of the semiempirical Khosla–Fischer expression. |
| Databáze: | OpenAIRE |
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