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Title

Exchange interactions in mixed Yb3+-Cr3+ and Yb3+-Ho3+ dimers: An inelastic-neutron-scattering investigation of Cs3Yb1.8Cr0.2Br9 and Cs3Yb1.8Ho0.2Br9

Authors
Aebersold, M. A.
Güdel, Hans-Ulrich
Furrer, Albert
Blank, H.
Kahn, Richard A.
Published in Physical Review. B, Condensed Matter. 1993, vol. 48, no. 1-2, p. 12723-12731
Abstract The two title compounds were synthesized and investigated with the inelastic-neutron-scattering (INS) technique. They contain mixed YbMBr93- (M=Cr3+, Ho3+) dimers as discrete units, and the magnetic excitations of mixed Yb3+-Cr3+ and Yb3+-Ho3+ dimers could thus be observed. The Yb3+-Cr3+ dimer has three INS transitions, for which anisotropic exchange, as well as zero-field splitting of Cr3+, has to be included in the exchange Hamiltonian. For the Yb3+-Ho3+ dimer the effect of the exchange interaction manifests itself as a broadening and a splitting of the crystal-electric-field levels of the isolated Ho3+ ion. Taking into account the full (2J+1) ground-state multiplet of Ho3+, as well as anisotropic exchange, gives a satisfactory description of this dimer.
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AEBERSOLD, M. A. et al. Exchange interactions in mixed Yb3+-Cr3+ and Yb3+-Ho3+ dimers: An inelastic-neutron-scattering investigation of Cs3Yb1.8Cr0.2Br9 and Cs3Yb1.8Ho0.2Br9. In: Physical Review. B, Condensed Matter, 1993, vol. 48, n° 1-2, p. 12723-12731. https://archive-ouverte.unige.ch/unige:3021

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Deposited on : 2009-09-21

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