Evidence of the Bi3+ lone-pair effect on the charge-ordering state: resistivity and thermoelectric power of Bi0.5−yLaySr0.5MnO3 (0.0 < y < 0.4)
SCIE
SCOPUS
- Title
- Evidence of the Bi3+ lone-pair effect on the charge-ordering state: resistivity and thermoelectric power of Bi0.5−yLaySr0.5MnO3 (0.0 < y < 0.4)
- Authors
- Kim, BH; Kim, JS; Park, TH; Lee, DS; Kim, KH; Kim, BG; Park, YW
- Date Issued
- 2007-07-25
- Publisher
- Institute of Physics
- Abstract
- Polycrystalline samples of Bi0.5-gamma La gamma Sr0.5MnO3 (0.0 <= gamma <= 0.4) (BLSMO) have been synthesized to investigate the Bi3+ lone-pair effect on the long-range charge-ordering (CO) state. Since the ionic size of La3+ is similar to that of Bi3+ and the Mn valence state does not change with La doping, we obtained the Bi lone-pair effect on the CO state without disturbance by other effects. The resistivity rho(T) and thermoelectric power S(T) of BLSMO have been measured. A hysteretic behaviour was observed in both rho(T) and S(T) for gamma = 0.1 and 0.2. From the onset of the hysteretic behaviour, we defined a charge-ordering temperature (T-CO) and compared it to that of Bi1-xSrxMnO3 (BSMO). Finally, we found that the Bi3+ lone pairs play an important role in the anomalously high T-CO in BSMO.
- Keywords
- TRANSPORT-PROPERTIES; HIGH-TEMPERATURE; LA0.5CA0.5MNO3; MANGANITES
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/25992
- DOI
- 10.1088/0953-8984/19/29/296205
- ISSN
- 0953-8984
- Article Type
- Article
- Citation
- JOURNAL OF PHYSICS-CONDENSED MATTER, vol. 19, no. 29, 2007-07-25
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