Self-Organized Growth of Clustered Structures in La{sub 0.6–x}Nd{sub x}Sr{sub 0.3}Mn{sub 1.1}O{sub 3–δ} Doped Perovskites
- National Academy of Sciences of Ukraine, Galkin Institute for Physics and Technology (Ukraine)
- Donetsk National Technical University (Ukraine)
Our results on the atomic order in La{sub 0.6–x}Nd{sub x}Sr{sub 0.3}Mn{sub 1.1}O{sub 3–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 Å in size; clustered groups with mesoscopic atomic order and D = 100–200 Å; amorphous clustered groups with D = 20–30 Å; and a disordered material with short-range atomic order, on a length scale of two or three interatomic distances (D ~ 10 Å). 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 Å in size, as well as those of the rhombohedral phase 20–50 Å in size, initiate an FM → AFM magnetic phase transition in the range 200–250 K. Neodymium substitution for half of the lanthanum (in La{sub 0.3}Nd{sub 0.3}Sr{sub 0.3}Mn{sub 1.1}O{sub 3–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 Å in the orthorhombic ferromagnetic and rhombohedral antiferromagnetic phases.
- OSTI ID:
- 22788155
- Journal Information:
- Inorganic Materials, Vol. 54, Issue 4; Other Information: Copyright (c) 2018 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0020-1685
- Country of Publication:
- United States
- Language:
- English
Similar Records
Mn K-edge XANES study of the La{sub 1-x}Ca{sub x}MnO{sub 3} colossal magnetoresistive manganites
Oxygen Transport Ceramic Membranes