Abstract
Lattice and magnetic properties are investigated for 3% Ru- and Cr-doped Nd1/2Ca1/2MnO3. The parent Nd 1/2Ca1/2MnO3 is a charge-ordered insulator (TCO = 250 K). With decreasing temperature below ≈210 K, these compounds are separated into two perovskite phases, that is, the long-c and short-c phases. The long-c region shows a ferromagnetic transition at T C ≈ 210 K for the Ru-doped compound and ≈130 K for the Cr-doped compound, while the short-c region shows antiferromagnetic transition at TN ≈ 150 K for Ru and ≈110 K for Cr. We discuss the origin of the enhanced Tc for the Ru-doped compound in terms of the effective one-electron bandwidth W of the eg-band.
Original language | English |
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Pages (from-to) | 1626-1629 |
Number of pages | 4 |
Journal | journal of the physical society of japan |
Volume | 71 |
Issue number | 7 |
DOIs | |
Publication status | Published - 2002 Jul |
Externally published | Yes |
Keywords
- B-site substitution
- Neutron powder diffraction
- Perovskite manganite
- Rietveld analysis
ASJC Scopus subject areas
- Physics and Astronomy(all)