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Magnetic ordering in the ultrapure site-diluted spin chain materials SrCu1-xNixO2

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Simutis G., Thede M., Saint-Martin R., Mohan A., Baines C., Guguchia Z., Khasanov R., Hess C., Revcolevschi A., Buechner B., Zheludev A.,
Project Interplay between the superconductivity and magnetism in cuprate and Fe-based superconductors
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Original article (peer-reviewed)

Volume (Issue) 93(21)
Page(s) 214430
Title of proceedings PHYSICAL REVIEW B
DOI 10.1103/physrevb.93.214430


The muon spin rotation technique is used to study magnetic ordering in ultrapure samples of SrCu1-xNixO2, an archetypical S = 1/2 antiferromagnetic Heisenberg chain system with a small number of S = 1 defects. The ordered state in the parent compound is shown to be highly homogeneous, contrary to a previous report {[}M. Matsuda et al., Phys. Rev. B 55, R11953 (1997)]. Even a minute number of Ni impurities results in inhomogeneous order and a decrease of the transition temperature. At as little as 0.5\% Ni concentration, magnetic ordering is entirely suppressed. The results are compared to previous theoretical studies of weakly coupled spin chains with site defects.}