Freezing of spin and charge in La_(2-x)Sr_xCuO_4
作者： D. R. Harshman , G. Aeppli , G. P. Espinosa , A. S. Cooper , J. P. Remeika
关键词: Larmor precession 、 Electric charge 、 Angular momentum 、 Electrical resistivity and conductivity 、 Spin (physics) 、 Relaxation (NMR) 、 Magnetic moment 、 Condensed matter physics 、 Materials science 、 Population
摘要: Zero- and longitudinal-field muon-spin relaxation μ+SR measurements have been performed on La_(2-x)Sr_xCuO_4 alloys in both single-crystal sintered powder forms above below their magnetic transition temperatures, T_f. The μ+ precession frequency v depends only weakly x T_f, an observation which together with resistivity data implies classical freezing of moments the regime where carriers are localized. For x=0.05, critical dynamics observed near μ^+SR technique is shown to be very sensitive ferromagnetically aligned pairs Cu^(2+) moments; population such increases greatly x.
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