Magnetic properties of the multiferroics Bi1−xCaxFe1−xMnxO3and Bi1−xCaxFe1−xTixO3
| Autor: | M. V. Bushinsky, A. N. Chobot, V. V. Eremenko, G. M. Chobot, N. V. Tereshko, V. A. Sirenko, O. S. Mantytskaya, I. O. Troyanchuk |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Physics and Astronomy (miscellaneous) Condensed matter physics General Physics and Astronomy chemistry.chemical_element 02 engineering and technology Manganese equipment and supplies 021001 nanoscience & nanotechnology 01 natural sciences Magnetic anisotropy Ferromagnetism chemistry Phase (matter) 0103 physical sciences Diamagnetism Orthorhombic crystal system Multiferroics 010306 general physics 0210 nano-technology human activities Spontaneous magnetization |
| Zdroj: | Low Temperature Physics. 42:1122-1125 |
| ISSN: | 1090-6517 1063-777X |
| DOI: | 10.1063/1.4973007 |
| Popis: | This is a study of the crystalline structure and magnetic properties of the multiferroics Bi1−xCaxFe1−xMexO3 (Me = Mn, Ti). It is shown that Mn and Ti are in a quadrivalent state and the oxygen stoichiometry is conserved. The Me = Mn series undergoes a conversion at x = 0.19 from a polar rhombohedral phase (R3c) to a nonpolar orthorhombic phase (Pnma). A similar transition in the Me = Ti series was observed at x = 0.25. In both series, the polar phase (x ≥ 0.1) is weakly ferromagnetic. The spontaneous magnetization of the titanium series, however, exceeds that of the manganese series by more than a factor of three, despite the fact that Ti4+ is a diamagnetic ion. The residual magnetization of the titanium series decreases with rising temperature, while that of the manganese series increases anomalously within the interval 0.1 ≤ x ≤ 0.22. This behavior of the magnetic properties of the manganese series is explained by the extremely high sensitivity of the magnetic anisotropy to changes in the parameters of... |
| Databáze: | OpenAIRE |
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