Influence of the Jahn–Teller distortion on magnetic ordering in TbMn1-xFexO3

doi:10.1088/1674-1056/21/10/107501

Abstract The Jahn-Teller distortion plays an important role in determining the exchange interaction in rare-earth manganites. In this work we study the influence of the Jahn-Teller distortion on the magnetic structures of TbMn_1-xFe_xO₃ (x=0, 0.02, 0.05, 0.10, and 0.20) single crystals in the basal MnO₂ plane. The decrease in the quadruple splitting with the increasing Fe doping indicates the reduction of the Jahn-Teller distortion, which makes the nearest neighboring (NN) FM interaction dominant over the next nearest neighbor (NNN) AFM interaction. This alteration is favorable for the development of A-type AFM ordering instead of the spiral magnetic ordering, which collapses when x≥0.05. The analysis of dielectric data indicates that the ferroelectricity is arising from the peculiar spiral magnetic ordering.

Keywords: quadruple splitting Jahn-Teller distortion spiral magnetic ordering

Received: 17 May 2012
Revised: 04 June 2012
Accepted manuscript online:

PACS:	75.30.Fv	(Spin-density waves)
	71.70.Ej	(Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)
	77.84.Bw	(Elements, oxides, nitrides, borides, carbides, chalcogenides, etc.)
	77.85.+t

Fund: Project supported by the National Basic Research Program of China (Grant Nos. 2010CB934202 and 2011CB921801) and the National Natural Sciences Foundation of China (Grant Nos. 11174351, 50931006, 51021061, and 11034004).

Corresponding Authors: Cheng Zhao-Hua
E-mail: zhcheng@aphy.iphy.ac.cn

Cite this article:

Jin Jin-Ling (靳金玲), Zhang Xiang-Qun (张向群), Li Guo-Ke (李国科), Cheng Zhao-Hua (成昭华) Influence of the Jahn–Teller distortion on magnetic ordering in TbMn_1-xFe_xO₃ 2012 Chin. Phys. B 21 107501

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Influence of the Jahn–Teller distortion on magnetic ordering in TbMn1-xFexO3

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Influence of the Jahn–Teller distortion on magnetic ordering in TbMn_1-xFe_xO₃