Abstract
An antiferromagnetic resonance (AFMR) is observed in the charge ordered antiferromagnetic phase of Pr0.5Ca0.5MnO 3-δ single crystal for the first time. Above the Néel temperature, TN = 173 K, a paramagnetic resonance with g = 2.0 is observed, There is no significant change of the resonance spectra at the charge ordering transition temperature, Tco = 242K, Below TN, a branch of AFMR is found. Since the resonance field of this mode increases linearly as the frequency is decreased, this branch is assigned, as the spin-flop mode. Below 60K, the critical fields, Bc, evaluated as the extrapolation of this mode to zero frequency agree well with the insulator-metal transition fields, BCO, at which the melting of the charge-ordering phase occurs. Present results indicate that the temperature dependence of B co is affected by the temperature dependence of Bc.
Original language | English |
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Pages (from-to) | 854-856 |
Number of pages | 3 |
Journal | Journal of Magnetism and Magnetic Materials |
Volume | 226-230 |
Issue number | PART I |
DOIs | |
Publication status | Published - 2001 Jan 1 |
Keywords
- Charge ordering
- Dependent
- Perovskite structure
- Phase transitions-field
- Resonance-antiferromagnetic
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics