Enhancement of ferromagnetic interactions in multiferric (Tb1-XNaX)MnO3 system

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Title:	Enhancement of ferromagnetic interactions in multiferric (Tb1-XNaX)MnO3 system
Authors:	Chan, TS Liu, RS Lien, Y.H. Yang, C.C. Huang, C.Y. Lin, J.G.
Contributors:	材科所
Keywords:	ferroelectric materials magnetic susceptibility magnetoelectric effects X-ray
Date:	2005
Issue Date:	2009-11-12 13:59:06 (UTC+8)
Abstract:	The crystal structure, magnetic, and transport properties of (Tb1-infinityNainfinity)MnO3 (0 <= x <= 0.3) perovskites prepared by solid-state reaction were investigated. According to powder X-ray diffraction (XRD), the compounds were found to be of orthorhombic crystal structure with a space group Pbnm. The (Tb1-xNax)MnO3 system shows a magnetic transition around 10, 20, and 30 K for x = 0, 0.15, and 0.3, respectively, at a magnetic field of 1000 Oe. Both magnitude and the temperature position of the peak increase with increasing Na content. This behavior points to enhancement of the ferromagnetic interactions. Moreover, a decrease in activation energy from 62 meV (x = 0) to 39 meV (x = 0.3) was found. This means that Na substitution decreases the activation energy and resistivity in the parent TbMnO3.
Relation:	IEEE TRANSACTIONS ON MAGNETICS Volume: 41 Issue: 10 Pages: 2751-2753
Appears in Collections:	[Department of Chemical & Materials Engineering] conference paper

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