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Electronic phase separation in transition metal oxide systems.
C N R Rao1, Asish K Kundu, Md Motin Seikh
1Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bangalore 560064, India.
Dalton Transactions (Cambridge, England : 2003)
|September 29, 2004
Summary
Electronic phase separation in transition metal oxides is key to understanding magnetic and transport properties. This study explores phase separation in rare-earth manganates and cobaltates, detailing their magnetic, electronic, and electric field behaviors.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Solid State Chemistry
Background:
- Electronic phase separation is crucial for understanding magnetic and electron transport in transition metal oxides.
- This phenomenon significantly influences the properties of rare-earth manganates (Ln(1-x)A(x)MnO(3)) and cobaltates.
Purpose of the Study:
- To investigate electronic phase separation in specific rare-earth manganates and cobaltates.
- To correlate phase separation with magnetic, electron transport, and electric field effects.
Main Methods:
- Analysis of magnetic and electron transport properties.
- Examination of specific compositions like Pr(1-x)Ca(x)MnO(3), (La(1-x)Ln(x))(0.7)Ca(0.3)MnO(3), Nd(0.5)Sr(0.5)MnO(3), Pr(0.7)Ca(0.3)CoO(3), and Gd(0.5)Ba(0.5)CoO(3).
Main Results:
- Phase separation phenomena were identified in the studied manganates and cobaltates.
- Magnetic and electron transport properties were found to be dependent on composition, cation size, and external fields.
- Electric field effects were also observed and analyzed.
Conclusions:
- Electronic phase separation is a dominant factor in the magnetic and transport properties of these transition metal oxides.
- Understanding phase separation provides insights into controlling the functional behavior of these materials.