Multiphase segregation and metal-insulator transition in single crystal La5/8-yPryCa3/8MnO3
SCIE
SCOPUS
- Title
- Multiphase segregation and metal-insulator transition in single crystal La5/8-yPryCa3/8MnO3
- Authors
- Kiryukhin, V; Kim, BG; Podzorov, V; Cheong, SW; Koo, TY; Hill, JP; Moon, I; Jeong, YH
- Date Issued
- 2001-01-01
- Publisher
- AMERICAN PHYSICAL SOC
- Abstract
- The insulator-metal transition in single crystal La5/8-yPryCa3/8MnO3 with y approximate to 0.35 was studied using synchrotron x-ray diffraction, electric resistivity, magnetic susceptibility, and specific heat measurements. Despite the dramatic drop in the resistivity at the insulator-metal transition temperature T-MI, the charge-ordering (CO) peaks exhibit no anomaly at this temperature and continue to grow below T-MI Our data suggest then, that in addition to the CO phase. another insulating phase is present below T-CO. In this picture, the insulator-metal transition is due to the changes that occur within this latter phase. The CO phase does not appear to play a major rule in this transition. We propose that a percolationlike insulator-metal transition occurs via the growth of ferromagnetic metallic domains within the parts of the sample that do not exhibit charge ordering. Finally, we find that the low-temperature phase-separated state is unstable against x-ray irradiation, which destroys the CO phase at low temperatures.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/12079
- DOI
- 10.1103/PhysRevB.63.024420
- ISSN
- 0163-1829
- Article Type
- Article
- Citation
- PHYSICAL REVIEW B, vol. 63, no. 2, 2001-01-01
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