| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1487456 | Materials Research Bulletin | 2016 | 7 Pages |
•Electron doped manganite.•Magnetic phase separation observed.•Structural transition coupled with magnetic transition.
The effect of electron doping on the structural, transport, and magnetic properties of Mn (IV)—rich Ca1−xYxMnO3 (x ≤ 0.2) samples have been investigated using neutron diffraction, neutron depolarization, magnetization and resistivity techniques. The temperature dependence of resistivity follows the small polaron model and the activation energy exhibits a minimum for x = 0.1 sample. A phase separated magnetic ground state consisting of ferromagnetic domains (∼7 μm) embedded in G-type antiferromagnetic matrix is observed in the sample, x = 0.1. The transition to the long-range magnetically ordered state in this sample is preceded by a Griffith’s phase. On lowering temperature below 300 K a structural transition from orthorhombic structure (Pnma) to a monoclinic structure (P21/m) is observed in the case of x = 0.2 sample. The ferromagnetic behavior in this case is suppressed and the antiferromagnetic ordering is described by coexisting C-type and G-type magnetic structures corresponding to the monoclinic and orthorhombic phases, respectively.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide
