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We study the properties of generalized striped phases of doped cuprate planarquantum antiferromagnets. We invoke an effective, spatially anisotropic,non-linear sigma model in two space dimensions. Our theoretical predictions arein quantitative agreement with recent experiments in La_{2-x}Sr_xCuO_4 with $0\leq x \leq 0.018$. We focus on (i) the magnetic correlation length, (ii) thestaggered magnetization at $T=0$ and (iii) the N\'eel temperature, as functionsof doping, using parameters determined previously and independently for thissystem. These results support the proposal that the low doping(antiferromagnetic) phase of the cuprates has a striped configuration.Comment: 4 pages, Revtex. To appear in the Proceedings of the International  Conference "Stripes, Lattice Instabilities and High Tc Superconductivity",  (Rome, Dec. 1996

Theory of spin fluctuations in striped phases of doped antiferromagnetic cuprates