Pressure induced effects on the chemical and magnetic structure of spinel MnV2O4.

摘要: The influence of external pressure (P  ⩽  5 GPa) on both the structural and magnetic ordering in MnV2O4 has been investigated using neutron diffraction technique. volume V-V distance decrease with while c/a ratio increases, suggesting a lowering distortion pressure. Under ambient conditions this compound exhibits transition (T S) from tetragonal to cubic at ~53 K N ) ~56 K. It is found that an increase 5 GPa, T increases (from 56 K 80 K), dT /dP  >  0, S decreases 53 K 37 K). non collinear structure phase 5 GPa 10 K remains same as However, Mn V sublattice, now distinct temperatures, [Formula: see text] ~ 80 K, 60 K. accompanied by alignment spins reduction moment. region which ~3 K ~43 K