Spin dynamics in the low-temperature tetragonal phase of congruent with ( 1/ 8 ) doped single crystal La{sub 1.67}Eu{sub 0.2}Sr{sub 0.13}CuO{sub 4}
Journal Article
·
· Physical Review. B, Condensed Matter and Materials Physics
- Condensed Matter and Thermal Physics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
- II. Physikalisches Institut, Universitaet zu Koeln, D-50937 Koeln, (Germany)
- Laboratoire de Chimie des Solides, Universite Paris-Sud, 91405 Orsay Cedex, (France)
We present {sup 139}La and {sup 63}Cu NMR relaxation measurements in single crystal La{sub 1.67}Eu{sub 0.2}Sr{sub 0.13}CuO{sub 4}. A strong peak in the {sup 139}La spin-lattice relaxation rate observed in the spin ordered state is well described by the BPP mechanism [Bloembergen, Purcell, and Pound, Phys. Rev. 73, 679 (1948)] and arises from continuous slowing of electronic spin fluctuations with decreasing temperature; these spin fluctuations exhibit XY-like anisotropy in the ordered state. The spin pseudogap is significantly enhanced by the static charge-stripe order in the LTT phase. (c) 2000 The American Physical Society.
- OSTI ID:
- 20215846
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 61, Issue 14; Other Information: PBD: 1 Apr 2000; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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