Competing exchange interactions and magnetic anisotropy of La1−xTbxMn2Si2

E. G. Gerasimov, N. V. Mushnikov, P. B. Terentev, K. A. Yazovskikh, I. S. Titov, V. S. Gaviko, Rie Y. Umetsu

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9 Citations (Scopus)


Crystal structure, magnetization and magnetic susceptibility have been studied for the La1−xTbxMn2Si2 (0≤x≤1) polycrystalline and quasi-single crystalline samples. It has been shown that, at low temperature T =4.2 K, substitution of the terbium for lanthanum leads to recurred change of the type of interlayer Mn-Mn magnetic ordering. For the compounds with x<0.2 ≈ xc1 the manganese magnetic moments of adjacent layers are ordered ferromagnetically, in the concentration range 0.2<x<xc2 (the critical concentration xc2 is between 0.4 and 0.6) the antiferromagnetic order is realized, while for x>xc2 the Mn sublattice is again ferromagnetically ordered and, due to the negative Tb–Mn interaction, ferrimagnetic structure is formed. Using the magnetization data, the concentration magnetic phase diagram has been suggested. The observed variation of the type of magnetic ordering has been explained in terms of the change of interatomic Mn-Mn distances and a competition of the Tb–Mn, Mn–Mn and Tb–Tb interlayer exchange interactions.

Original languageEnglish
Pages (from-to)237-242
Number of pages6
JournalJournal of Magnetism and Magnetic Materials
Publication statusPublished - 2017 Jan 15


  • Exchange interaction
  • Magnetic anisotropy
  • Magnetic phase diagram
  • Magnetic phase transition
  • Rare-earth intermetallics


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