Evolution of the spin state transition with doping in La{sub 1-x}Sr{sub x}CoO{sub 3}.
- Materials Science Division
The thermally induced spin-state transition of Co{sup 3+} ions in the cobaltite LaCoO{sub 3}, found at temperatures in the range 40 to 120 K, has been the subject of extensive experimental and theoretical investigation. Much less is known about what happens to the spin-state transition in hole-doped La{sub 1-x}Sr{sub x}CoO{sub 3} (LSCO). The present {sup 139}La NMR experiments show that spin-state transitions persist in nanoscale hole-poor regions of the inhomogeneous doped material. In fact, thermally induced spin-state transitions remain important for doping levels close to the metal-insulator critical concentration of x{sub C} = 0.17. This finding suggests that the unusual glassy behavior seen in doped LSCO for x < 0.18 results from the interplay of spin-state transitions in hole-poor regions and ferromagnetism in hole-rich regions.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 1050187
- Report Number(s):
- ANL/MSD/JA-73981; TRN: US201218%%538
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 86, Issue 5; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- ENGLISH
Similar Records
Magnetic and transport properties of the system La{sub 1-x}Sr{sub x}CoO{sub 3-{delta}} (0 < x {le} 0.50)
Direct measurement of the low temperature spin state transitions in La{sub 1−x}Sr{sub x}CoO{sub 3} (0.05 < x < 0.3)