Self-Organized Growth of Clustered Structures in La0.6–xNd x Sr0.3Mn1.1O3–δ Doped Perovskites
| Autor: | Z. A. Samoilenko, E. I. Pushenko, A. V. Pashchenko, N. N. Ivakhnenko, Yu. S. Prilipko |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science General Chemical Engineering Metals and Alloys chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Manganite 01 natural sciences Neodymium Amorphous solid Inorganic Chemistry Crystallography Ferromagnetism chemistry Phase (matter) 0103 physical sciences Materials Chemistry Lanthanum Antiferromagnetism Orthorhombic crystal system 0210 nano-technology |
| Zdroj: | Inorganic Materials. 54:354-360 |
| ISSN: | 1608-3172 0020-1685 |
| DOI: | 10.1134/s0020168518040118 |
| Popis: | Our results on the atomic order in La0.6–xNd x Sr0.3Mn1.1O3–δ manganites with partial Nd substitution for La (x = 0–0.4) demonstrate that all of the materials consist of differently sized groups: microcrystalline groups with long-range atomic order, D = 300–600 A in size; clustered groups with mesoscopic atomic order and D = 100–200 A; amorphous clustered groups with D = 20–30 A; and a disordered material with short-range atomic order, on a length scale of two or three interatomic distances (D ~ 10 A). It has been shown that, in the case of partial Nd substitution for La (x = 0.1–0.2) in the manganite, clusters 100–200 A in size, as well as those of the rhombohedral phase 20–50 A in size, initiate an FM → AFM magnetic phase transition in the range 200–250 K. Neodymium substitution for half of the lanthanum (in La0.3Nd0.3Sr0.3Mn1.1O3–δ) has been found to result in the development of self-organization processes, with a reduction in cluster size fluctuations in the range ΔD ≈ ±50 A in the orthorhombic ferromagnetic and rhombohedral antiferromagnetic phases. |
| Databáze: | OpenAIRE |
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