کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1333747 | 979099 | 2008 | 4 صفحه PDF | دانلود رایگان |
Magnetic properties of Mn2V2O7 single crystals are investigated by means of magnetic susceptibility, magnetization, and heat capacity measurements. A structural phase transition of the α–β forms is clearly observed at the temperature range of 200–250 K and an antiferromagnetic ordering with magnetic anisotropy is observed below 20 K. A spin-flop transition is observed with magnetic field applied along the [110] axis of β-Mn2V2O7, of which corresponds to the [001] axis of α-Mn2V2O7, suggesting that the spins of Mn2+ ions locate within honeycomb layers which point likely in the [110] direction of β-Mn2V2O7 or the [001] axis of α-Mn2V2O7. However, a rather small jump of magnetization at spin-flop transition suggests a possible partition of crystal to some domains through β-to-α transition on cooling or much complex spin structure in honeycomb lattice with some frustration.
A structural phase transition of the α–β forms occurs at 200–250 K and an antiferromagnetic ordering occurs at ∼20 K. A field-induced spin-flop transition shows that spins of Mn2+ ions in Mn2V2O7 may locate within honeycomb layers.Figure optionsDownload as PowerPoint slide
Journal: Journal of Solid State Chemistry - Volume 181, Issue 2, February 2008, Pages 235–238