2003/07/31 by S. Ouazi, J. Bobroff, Julien Bobroff +2
Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.70.104515
8 latex pages + 8 figures, to appear in Physical Review B, this resubmitted version is twice longer than the previous one : we detail here our method to determine the impurity-induced magnetization
arxiv created 2004/09/13 · openalex publication_date 2004/09/23 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We report a new multinuclei based nuclear magnetic resonance method which allows us to image the staggered polarization induced by nonmagnetic Li impurities in underdoped (O6.6) and slightly overdoped (O7) YBa2Cu3O6+y above TC. The spatial extension of the polarization \ensuremathξimp approximately follows a Curie law, increasing up to six lattice constants at 80\phantom\rule0.3em0exK at O6.6 in the pseudogap regime. Near optimal doping, the staggered magnetization has the same shape, with \ensuremathξimp reduced by a factor 2. \ensuremathξimp is argued to reveal the intrinsic magnetic correlation length of the pure system. It is found to display a smooth evolution through the pseudogap regime.