Help Privacy Policy Disclaimer
  Advanced SearchBrowse




Journal Article

Magnetic order in a Kondo lattice: A neutron scattering study of CeCu2Ge2

There are no MPG-Authors in the publication available
External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available

Knopp, G., Loidl, A., Knorr, K., Pawlak, L., Duczmal, M., Caspary, R., et al. (1989). Magnetic order in a Kondo lattice: A neutron scattering study of CeCu2Ge2. Zeitschrift für Physik B, 77(1), 95-104. doi:10.1007/BF01313625.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0019-CF5E-B
Elastic and inelastic neutron scattering studies of the Kondo lattice CeCu2Ge2 were performed. AtT N=4.1 K an incommensurate magnetic order develops with an ordering wave vectorq 0=(0.28, 0.28, 0.54) and an ordered moment µ s =0.74 µB. The crystalline electric field splits the 4f 1-J-multiplet of the Ce ion into a ground state doublet and a quartet at 191 K. The wave function of the ground state yields an ordered moment of 1.54µB. Thus, due to the onset of the formation of a Kondo singlet the magnetic moment is considerably reduced. The magnetic relaxation rate Λ was investigated via quasielastic neutron scattering. The temperature dependence of Λ(T) is characteristic of heavy-fermion systems with a high temperature square root dependence and a limiting low temperature value, yielding a Kondo temperatureT K≈10K. The quasielastic component of the scattered neutron intensities persists down to the lowest temperatures, well belowT N. This quasielastic line is regarded as a characteristic feature of heavy-fermion systems and corresponds to the enhanced value of the linear term of the specific heat.