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Phase separation, effects of magnetic field and high pressure on charge ordering in γ-Na0.5CoO2
- Source :
-
Materials Chemistry & Physics . Nov2005, Vol. 94 Issue 1, p119-124. 6p. - Publication Year :
- 2005
-
Abstract
- Abstract: Transmission electron microscopy (TEM) observations reveal the presence of complex superstructures and remarkable phase separation in association with Na-ordering phenomenon in γ-Na0.5CoO2. Resistivity and magnetization measurements indicate that three phase transitions at the temperatures of 25, 53 and 90K, respectively, appear commonly in γ-Na0.5CoO2 samples. Under a high pressure up to 10kbar, the low-temperature transport properties show certain changes below the charge order transition; under an applied magnetic field of 7T, phase transitions at around 25 and 53K, proposed fundamentally in connection with alternations of magnetic structure and charge ordering maintain almost unchanged. [Copyright &y& Elsevier]
- Subjects :
- *TRANSMISSION electron microscopy
*TEMPERATURE
*PRESSURE
*ELECTRON microscopy
Subjects
Details
- Language :
- English
- ISSN :
- 02540584
- Volume :
- 94
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Materials Chemistry & Physics
- Publication Type :
- Academic Journal
- Accession number :
- 18211121
- Full Text :
- https://doi.org/10.1016/j.matchemphys.2005.04.025