@article {SaadaouiVortex2009,
	title = {Vortex lattice disorder in YBa$_2$Cu$_3$O$_{7-δ$ studied with $\beta$-NMR},
	journal = {Physica B: Condensed Matter},
	volume = {404},
	number = {5{\textendash}7},
	year = {2009},
	note = {Proceedings of the Eleventh International Conference on Muon Spin Rotation, Relaxation and Resonance},
	pages = {730 - 733},
	abstract = {In this paper, we report Li + 8 β -NMR measurements in thin Ag films deposited on the surface of \{YBa\} 2 Cu 3 O 7 - δ (YBCO) in the vortex state. The resonance in the Ag overlayer broadens dramatically below the superconducting transition temperature T c , as expected from the underlying vortex lattice in the YBCO. However, the lineshape is much broader and more symmetric than expected for an ideal vortex lattice. These results indicate the observed field distribution in the Ag overlayer is dominated by extrinsic, long length scale disorder.},
	keywords = {Vortex state},
	issn = {0921-4526},
	doi = {http://dx.doi.org/10.1016/j.physb.2008.11.229},
	url = {http://www.sciencedirect.com/science/article/pii/S0921452608006558},
	author = {H. Saadaoui and W.A. MacFarlane and G.D. Morris and Z. Salman and K.H. Chow and I. Fan and M.D. Hossain and R. Liang and A.I. Mansour and T.J. Parolin and M. Smadella and Q. Song and D. Wang and R.F. Kiefl}
}
