### Abstract

The inelasticity of the critical neutron scattering in Tb was measured at and above the Neel temperature. In the hydrodynamic region the line width Gamma (q=0, kappa 1)=C kappa z1, with z=1.4+or-0.1 and c=4.3+or-0.3 meVAAz. This result deviates from the conventional theory, which predicts that Gamma (q=0, kappa 1) is inversely proportional to the static susceptibility, that is z=2. In the critical region it was found that Gamma (q, kappa 1=0)= Lambda qdelta , with delta =2.0+or-0.1 and Lambda =7.5+or-0.7 meVAAdelta . The prediction of the dynamical scaling laws that delta =z is thus not fulfilled.

Original language | English |
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Journal | Journal of Physics C: Solid State Physics |

Volume | 4 |

Issue number | 1 |

Pages (from-to) | 71-79 |

ISSN | 0022-3719 |

DOIs | |

Publication status | Published - 1971 |

## Cite this

Dietrich, O. W., & Als-Nielsen, J. A. (1971). Spin dynamics in Tb studied by critical neutron scattering.

*Journal of Physics C: Solid State Physics*,*4*(1), 71-79. https://doi.org/10.1088/0022-3719/4/1/010