High-field magnetization and electronic spin resonance study in the twisted honeycomb lattice alpha-Mn2V2O7

We report the single-crystal growth of Mn2V2O7 and the results of magnetic susceptibility, high-field magnetization up to 55 T and high-frequency electric spin resonance (ESR) measurements for its low-temperature alpha phase. Two antiferromagnetic (AFM) ordering at 17.5 K and 3 K and obvious magnetic anisotropy are observed in alpha-Mn2V2O7 upon cooling. In pulsed high magnetic fields, the compound reaches the saturation magnetic moment of similar to 10.5 mu (B) for each molecular formula at around 45 T after two undergoing AFM phase transitions at H (c1) asymptotic to 16 T, H (c2) asymptotic to 34.5 T for H//[ 11-0 H (sf1) = 2.5 T, H (sf2) = 7 T for H//[ 001 1 and omega (2) modes of H//[ 11-0 sf1 and H (sf2), displaying the two signs of spin-flop transition. The fittings of omega (c1) and omega (c2) modes yield zero-field gaps at 69.50 GHz and 84.73 GHz for H//[ 001 2+ ion in alpha-Mn2V2O7 is in a high spin state with orbital moment completely quenched. A quasi-one-dimensional magnetism with a zig-zag-chain spin configuration is suggested in alpha-Mn2V2O7, due to the special neighbor interactions caused by a distorted network structure with honeycomb layer.