Abstract
Quadrupolar interactions have been extensively studied over the last few years in rare-earth (RE) compounds. They may be divided into two contributions. Firstly the quadrupolar pair (exchange) interactions were found to be present in some RE compounds such as RE pnictides1, TmZn2, TmCd3,4; in these latter two compounds they are strong enough for inducing a quadrupolar ordering. Secondly the strong 4f quadrupole-lattice (magnetoelastic) coupling is well known in RE compounds; it is usually revealed by a symmetry breaking occuring at the same time as the dipoles or quadrupoles order; when the dipolar exchange (Heisenberg) interactions dominate, this change of structure occurs at the magnetic ordering through a magnetostrictive process5; in case of quadrupoles ordering, this distortion occurs either through a quadrupolar striction6 if the quadrupolar exchange interactions dominate or through a cooperative Jahn-Teller effect7 if the magnetoelastic interactions dominate.
Laboratoire Propre du C.N.R.S., associé à l’Université Scientifique et Médicale de Grenoble
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© 1980 Plenum Press, New York
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Morin, P., Schmitt, D., du Trémolet de Lacheisserie, E. (1980). New Experimental Evidence of Quadrupolar Interactions in Cubic Rare-Earth Compounds. In: Crow, J.E., Guertin, R.P., Mihalisin, T.W. (eds) Crystalline Electric Field and Structural Effects in f-Electron Systems. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-3108-7_7
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DOI: https://doi.org/10.1007/978-1-4613-3108-7_7
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