Journal
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
Volume 188, Issue 1, Pages 89-101Publisher
SPRINGER HEIDELBERG
DOI: 10.1140/epjst/e2010-01299-6
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Funding
- DFG [FOR 538, BU887/4, 436 RUS 113/936/0-1]
- Office of Science, U.S. Department of Energy [DE-AC02-98CH10886]
- RFBR [08-02-91952-NNIO, 07-02-01184-a]
- I2CAM [NSC 96-2112-M-009-018-MY2]
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We report detailed O-17, La-139, and Cu-63,Cu-65 Nuclear Magnetic Resonance (NMR) and Nuclear Quadrupole Resonance (NQR) measurements in a stripe ordered La1.875Ba0.125CuO4 single crystal and in oriented powder samples of La1.8-x Eu0.2Sr (x) CuO4. We observe a partial wipeout of the O-17 NMR intensity and a simultaneous drop of the O-17 electric field gradient (EFG) at low temperatures where the spin stripe order sets in. In contrast, the Cu-63,Cu-65 intensity is completely wiped out at the same temperature. The drop of the O-17 quadrupole frequency is compatible with a charge stripe order. The O-17 spin lattice relaxation rate shows a peak similar to that of the La-139, which is of magnetic origin. This peak is doping dependent and is maximal at x a parts per thousand 1/8.
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