Isovalent Bi3+ substitution induced structural and magnetic transitions in LaMnO3
| Autor: | Wen-Chang Chen, J. G. Lin, N. Pavan Kumar, D. Paul Joseph, J.W. Lin |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Spin glass Condensed matter physics Doping 02 engineering and technology Coercivity 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Magnetization Structural change Phase (matter) 0103 physical sciences Phenomenological model Orthorhombic crystal system 0210 nano-technology |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 418:68-75 |
| ISSN: | 0304-8853 |
| DOI: | 10.1016/j.jmmm.2016.02.003 |
| Popis: | Rare earth perovskite manganites have attracted renewed attention due to scientific aspect and prospective device applications. This work explores the structural and magnetic properties of La (1− x ) Bi x MnO 3 ( x =0–0.5) with isovalent Bi 3+ ions substituted at the La 3+ site synthesized through solid state reaction method. Doping of ‘Bi 3+ ’ in LaMnO 3 induces transition from orthorhombic to cubic phase for x ≥ 0.3. Decrease in the magnetic transition temperature in ZFC-FC data is correlated to the distortion induced by ‘Bi 3+ ’ doping. Spin glass like feature is witnessed in orthorhombic phase and it diminished appreciably for x ≥0.3 in the cubic symmetry. At 10 K, coercivity decreases in orthorhombic phase, whereas it increases marginally in cubic phase. Thus, isovalent Bi 3+ doping in LaMnO 3 is found to induce structural change from orthorhombic to cubic which is also reflected in the magnetic properties as a change over from hard to soft magnetic phase. In addition, a phenomenological model is applied for fitting the field cooled magnetization data. The results of fitting and the related magneto-caloric effect are also discussed in this paper. |
| Databáze: | OpenAIRE |
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