We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Structural and magnetic phase transitions in PrCaMnO at high pressures.
- Authors
Kozlenko, D.; Chan, T.; Kichanov, S.; Jirák, Z.; Dubrovinsky, L.; Savenko, B.
- Abstract
The crystal structure and Raman spectra of PrCaMnO manganite at high pressures of up to 30 GPa and the magnetic structure at pressures of up to 1 GPa have been studied. A structural phase transition from the orthorhombic phase of the Pnma symmetry to the high-pressure orthorhombic phase of the Imma symmetry has been observed at P ∼ 15 GPa and room temperature. Anomalies of the pressure dependences of the bending and stretching vibrational modes have been observed in the region of the phase transition. A magnetic phase transition from the initial ferromagnetic ground state ( T = 120 K) to the A-type antiferromagnetic state ( T = 140 K) takes place at a relatively low pressure of P = 1 GPa in the low-temperature region. The structural mechanisms of the change of the character of the magnetic ordering have been discussed.
- Subjects
PHASE transitions; PRASEODYMIUM; CALCIUM; MANGANESE oxides; MAGNETIC structure; TEMPERATURE effect; FERROMAGNETISM
- Publication
JETP Letters, 2011, Vol 92, Issue 9, p590
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/S0021364010210058