Publications in Scientific Journals:

K. Flachbart, E. Bauer, S. Gabáni, H. Kaldarar, T. Lonkai, S. Matas, V. Pavlik, P. Priputen, N. Shitsevalova, K. Siemensmeyer, N. Sluchank:
"Magnetic ordering in HoB12 below and above TN";
Journal of Magnetism and Magnetic Materials, 310 (2007), 1727 - 1729.

English abstract:
Magnetic ordering in HoB12 below and above TN

K. Flachbart, Corresponding Author Contact Information, E-mail The Corresponding Author,
E. Bauer, S. Gabáni, H. Kaldarar, T. Lonkai, S. Maťas, V. Pavlík, P. Priputen, N. Shitsevalova, K. Siemensmeyer and N. Sluchanko

Institute of Experimental Physics, Slovak Academy of Sciences, SK-04001 Kosice, Slovakia
Institut für Festkörperphysik, TU Wien, A-1040 Wien, Austria
Hahn Meitner Institut, D-14109 Berlin, Germany
Institute for Problems of Materials Science, NASU, UA-252680 Kiev, Ukraine
General Physics Institute, Russian Academy of Sciences, RU-119991 Moscow, Russia

Available online 13 November 2006.


We present results of neutron scattering experiments on frustrated antiferromagnet HoB12 above and below Néel temperature TN. Diffuse scattering patterns indicate that above TN=7.4 K pronounced correlations between neighboring magnetic moments of Ho-ions appear, similar to one-dimensional (1D) magnets. Moreover, the diffuse scattering patterns show a symmetry reduction from fcc to simple cubic. Analogous behavior in three dimensional (3-D) systems is not known, although it was predicted by theory. Results below TN and in applied magnetic field, on the other hand, reveal three amplitude-modulated incommensurate magnetic structures in this compound. The role of various interactions leading to this behavior (above and below TN) is being discussed. Additional attention is paid also to ρ(T) resistivity dependencies in various magnetic fields close to and above the quantum critical point.

Keywords: Rare earth compound; Magnetic structure; Neutron scattering; Electrical resistivity

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