Physical pressure effect on the charge-ordering transition of BaSmFe2O5.0

Y. Moritomo, M. Hanawa, Y. Ohishi, K. Kato, J. Nakamura, M. Karppinen, H. Yamauchi

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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.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number6
Publication statusPublished - 1 Aug 2003
MoE publication typeA1 Journal article-refereed


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