Pressure effects on the charge-ordering (CO) transition have been investigated in BaSmFe2O5.0 by means of synchrotron-radiation x-ray powder-diffraction measurement together with a specially designed diamond anvil cell. It was found that the critical temperature TCO for the CO transition steeply (-56 K/GPa) decreases as pressure increases, and eventually the CO transition disappears about 2.6 GPa. Search for interrelations between the structural parameters and TCO revealed that orthorhombic distortion s [≡(a-b)/(a+b)], is the dominant structural parameter for the CO transition of BaSmFe2O5.0.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - 1 Aug 2003|
|MoE publication type||A1 Journal article-refereed|