Inhomogeneous Low Frequency Spin Dynamics in La_{1.65}Eu_{0.2}Sr_{0.15}CuO_4

A. Revcolevschi (Laboratoire de Chimie des Solides; B. B\"uchner; B.J. Suh (Los Alamos National Laboratory); France); Germany); M. H\"ucker; N.J. Curro; Orsay; P.C. Hammel; U. Ammerahl (II. Physikalisches Institut

arxiv: cond-mat/9911268 · v3 · submitted 1999-11-17 · ❄️ cond-mat.str-el

Inhomogeneous Low Frequency Spin Dynamics in La_(1.65)Eu_(0.2)Sr_(0.15)CuO₄

N.J. Curro , P.C. Hammel , B.J. Suh (Los Alamos National Laboratory) , M. H\"ucker , B. B\"uchner , U. Ammerahl (II. Physikalisches Institut , Universitat zu Koln , Germany)

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A. Revcolevschi (Laboratoire de Chimie des Solides Universite Paris-Sud Orsay France)

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keywords spininhomogeneousdynamicsfluctuationsrevealactivationappearsarise

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We report Cu and La nuclear magnetic resonance (NMR) measurements in the title compound that reveal an inhomogeneous glassy behavior of the spin dynamics. A low temperature peak in the La spin lattice relaxation rate and the ``wipeout'' of Cu intensity both arise from these slow electronic spin fluctuations that reveal a distribution of activation energies. Inhomogeneous slowing of spin fluctuations appears to be a general feature of doped lanthanum cuprate.

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Inhomogeneous Low Frequency Spin Dynamics in La_(1.65)Eu_(0.2)Sr_(0.15)CuO₄

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