Mechanism of Ferromagnetic Ordering of the Mn Chains in CaMnGe2O6 Clinopyroxene

  • F. V. Temnikov
  • E. V. KomlevaEmail author
  • Z. V. Pchelkina
  • S. V. StreltsovEmail author


The electronic and magnetic properties of clinopyroxene CaMnGe2O6 were studied using density function calculations within the GGA+U approximation. It is shown that anomalous ferromagnetic ordering of neighboring chains is due to a “common-enemy” mechanism. Two antiferromagnetic exchange couplings between nearest neighbours within the Mn-Mn chain and interchain coupling via two GeO4 tetrahedra suppress antiferromagnetic exchange via single GeO4 tetrahedron and stabilize ferromagnetic ordering of Mn chains.


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© Pleiades Publishing, Inc. 2019

Authors and Affiliations

  1. 1.Ural Federal UniversityEkaterinburgRussia
  2. 2.Institute of Metal PhysicsRussian Academy of ScienceEkaterinburgRussia

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