Structure and magnetic properties of LiMVO4 (M = Mn, Cu)

Research output: Contribution to journalArticle

Authors

Colleges, School and Institutes

External organisations

  • Technical Institute of Physics and Chemistry Chinese Academy of Sciences
  • University of Chinese Academy of Sciences

Abstract

LiM2+VO4 compounds with spinel-related structures show interesting electrochemical, magnetic and multiferroic properties. Neutron powder diffraction data for LiMVO4 (M ​= ​Cu, Mn) were collected at room temperature and 1.5 ​K. In contrast to single crystal NPD results, no evidence of magnetic ordering was detected for LiCuVO4 at 1.5 ​K due to the incommensurate order and low Cu2+magnetic moment. For LiMnVO4 (space group Cmcm) a clear ordered magnetic state was determined for the first time: the chains of edge-shared MnO6 octahedra have antiferromagnetic (AFM) order within each chain, and also between chains to give C′ centring. The magnetic behaviour of the MnO6 chain can be well described by the classical one-dimensional Heisenberg model with an intra-chain exchange energy of J/k ​= ​−4.32 ​K. It is believed that direct dxy ​− ​dxy AFM interactions are dominant over 90° Mn–O–Mn exchange for determining the magnetic order.

Details

Original languageEnglish
Article number121612
JournalJournal of Solid State Chemistry
Volume291
Publication statusPublished - Nov 2020

Keywords

  • 1D magnetic chains, Magnetic structure LiMnVO4, Magnetic susceptibility, Neutron powder Diffraction, Structure of LiCuVO4, LiMnVO4