Abstract
We report here the data of 139La nuclear spin-lattice relaxation times T1 taken from 4.2K to 275K in (La1−xSrx)2CuO4, concentrating on a region from x=0.075 (superconducting with highest Tc to x=0.15 (metallic). In the superconducting state of the compounds with x=0.075 and 0.10, T1−1 just below Tc decreases rapidly without any enhancement. In the metallic sample of x=0.15, T1 follows a Korringa law within our experimental range of 4.2-77K. On the other hand, in the normal state for x=0.075, T1−1 shows anomalous increase from 70K to ~150K and then levels off at high temperatures. This anomalous behavior is considered to be originated in a change of the density of state at the Fermi level near to the La sites, probably caused by the orthorhombic-to-tetragonal phase transition.
Original language | English |
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Pages (from-to) | 1299-1300 |
Number of pages | 2 |
Journal | Physica B: Condensed Matter |
Volume | 165-166 |
DOIs | |
Publication status | Published - 1990 |
Externally published | Yes |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering