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Influence of magnetic ordering on electronic structure of Tb 3+ ion in TbFe 3(BO 3) 4 crystal

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  • A. V. Malakhovskii

    ()

  • S. L. Gnatchenko
  • I. S. Kachur
  • V. G. Piryatinskaya
  • A. L. Sukhachev
  • V. L. Temerov
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    Abstract

    Optical absorption spectra of trigonal crystal TbFe 3(BO 3) 4 have been studied in the region of 7 F6 → 5 D4 transition in Tb 3+ ion depending on temperature (2–220 K) and on magnetic field (0–60 kOe). Splitting of the Tb 3+ excited states, both under the influence of the external magnetic field and effective exchange field of the Fe-sublattice, have been determined. Landé factors of the excited states have been found. Stepwise splitting of one of the absorption lines has been discovered in the region of the Fe-sublattice magnetic ordering temperature. This is shown to be due to the abrupt change of equilibrium geometry of the local Tb 3+ ion environment only in the excited state of the Tb 3+ ion. In general, the magnetic ordering is accompanied by temperature variations of the Tb 3+ local environment in the excited states. The crystal field splitting components have been identified. In particular, it has been shown that the ground state (in D 3 symmetry approximation) consists of two close singlet states of A 1 and A 2 type, which are split and magnetized by effective exchange field of the Fe-sublattice. Orientations of magnetic moments of the excited electronic states relative to that of the ground state have been experimentally determined in the magnetically ordered state of the crystal. A pronounced shift of one of absorption lines has been observed in the vicinity of the TbFe 3(BO 3) 4 structural phase transition. The temperature interval of coexistence of the phases is about 3 K. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2011

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    File URL: http://hdl.handle.net/10.1140/epjb/e2011-10806-x
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    Bibliographic Info

    Article provided by Springer in its journal The European Physical Journal B.

    Volume (Year): 80 (2011)
    Issue (Month): 1 (March)
    Pages: 1-10

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    Handle: RePEc:spr:eurphb:v:80:y:2011:i:1:p:1-10

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    Web page: http://www.springer.com/economics/journal/10051

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    1. Gu, Wulong Lafrance, Amelie, 2008. "Productivity Growth in Canadian and U.S. Regulated Industries," The Canadian Productivity Review 2008020e, Statistics Canada, Economic Analysis Division.
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