For CaCu3Ti4O12 - an insulator that exhibits a giant dielectric response above 100 K - Cu2+ antiferromagnetic spin ordering has been investigated by magnetic Raman scattering and magnetization measurements. Below the Néel temperature, TN=25 K, magnetic excitations have been identified. Above TN Raman spectra reveal short-range antiferromagnetic fluctuations that increase with cooling like T-1. No deviations from Curie-Weiss law have been observed above TN.
|Original language||English (US)|
|Number of pages||4|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|State||Published - Feb 1 2002|
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics