The origin of fine structure in magnetization curve of αCoV2O6
Sarov Physics and Technology Institute, National Research Nuclear University “MEPhI”, Dukhov str. 6, Sarov, 607186, Russia
2 National Research Nuclear University “MEPhI”, Kashirskoe shosse 31, Moscow, 115409, Russia
3 Russian Federal Nuclear Center - VNIIEF, Pr. Myra 37, Sarov, 607188, Russia
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Published online: 4 July 2018
Multiple field-induced plateaus in αCoV2O6 at low temperatures were revealed earlier by M. Lenertz et al. [J. Phys. Chem. C 115, 17190 (2011)] and carefully investigated recently by M. Nandi and P. Mandal [J. Appl. Phys. 119, 133904 (2016)]. Four equidistant steps were observed in the magnetization curve. We present a model to describe this phenomenon. A magnetic structure of this substance is formed by highly anisotropic triangular lattice of Ising chains running along the b axis. Due to a three-fold degeneracy of three-sublattice magnetic ordering, domain boundaries appear. Their transformation under magnetic field variation leads to two additional steps in the 1/3 magnetization plateau and gives rise to complex magnetic behavior observed experimentally. The domain structure in αCoV2O6 occurs to be strongly anisotropic because a lifetime of the metastable states depends greatly on the configuration orientation. A strong dependence of the magnetization curve on magnetic field sweep time is predicted.
© The Authors, published by EDP Sciences, 2018
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