Comparison of electronic structures of orthorhombic and hexagonal manganites studied by X-ray absorption spectroscopy

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Title:	Comparison of electronic structures of orthorhombic and hexagonal manganites studied by X-ray absorption spectroscopy
Authors:	Asokan, A.;Dong, C. L.;Bao, C. W.;Tsai, H. M.;Chiou, J. W.;張經霖;Chang, C. L.;彭維鋒;Pong, W. F.;Duran,P.;Moure, C.;Pena,O.
Contributors:	淡江大學物理學系
Keywords:	A. Manganites;C. XANES;D. Electronic structure;E. X-ray absorption spectroscopy
Date:	2005-06-01
Issue Date:	2009-12-31 10:52:02 (UTC+8)
Publisher:	Elsevier
Abstract:	Electronic structures of orthorhombic perovskite-type manganites (OM) and hexagonal manganites (HM) are compared by using X-ray absorption near edge structure spectroscopy. This study reveals that the environments around Mn and O ions in both the systems are different. These are reflected primarily in the lifting of degeneracy of the Mn 3d orbitals. Interestingly, the unoccupied Mn 3dx2−y2 orbital in HM is strongly hybridized with O 2p states and appears to be responsible for both long range orderings: ferroelectric ordering at high temperatures and ferromagnetic ordering at low temperatures.
Relation:	Solid State Communications 134(12), pp.821-826
DOI:	10.1016/j.ssc.2005.03.030
Appears in Collections:	[Graduate Institute & Department of Physics] Journal Article

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