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The intermetallic compound YbAl(3) has been usually classified as an intermediate valence system. Polarized neutron diffraction and bulk magnetization experiments were performed on the same flux grown single crystal of YbAl(3) to understand in detail the magnetic properties and in particular the electron hybridization of this compound. Due to the high purity of the sample a second maximum in the bulk magnetic susceptibility was observed at low temperatures in addition to the well-known 'Kondo-maximum' at T = 130 K. The localized moment on the Yb determined by polarized neutron diffraction shows a similar thermal variation but is slightly smaller than the total magnetization suggesting a small positive polarization of the conduction electrons. The form factor of Yb in this compound can be best fitted by the dipole approximation with c(2) = u(L)/u = 0.667, which is the free ion value of Yb(3+). The combination of the polarized neutron studies with magnetization measurements performed on the same sample gives a new insight of the details of the electron hybridization process. The results will be compared to those obtained on the isostructural intermediate valence compound CeSn(3).

Additional information

Authors: HIESS A ET AL, CEA, CEN Grenoble (FR);LELIÈVRE-BERNA E ET AL, Institut Laue-Langevin, Grenoble (FR);GILLON B, CEA, CEN Saclay, Gif-sur-Yvette (FR);CANFIELD P C, Iowa State University, Ames Laboratory (US)
Bibliographic Reference: Paper presented: 1st European Conference on Neutron Scattering, Interlaken (CH), October 8-11, 1996
Availability: Available from (1) as Paper EN 39908 ORA
Record Number: 199611462 / Last updated on: 1997-01-16
Original language: en
Available languages: en
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