Spin dynamics in the low - temperature tetragonal phase of · 18 doped single crystal
نویسندگان
چکیده
We present La and Cu NMR relaxation measurements in single crystal La1.67Eu0.2Sr0.13CuO4. A strong peak in the 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.
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