Enhancement of ferromagnetic interactions in multiferric (Tb1-XNaX)MnO3 system
Journal
IEEE Transactions on Magnetics
Journal Volume
41
Journal Issue
10
Pages
2751-2753
Date Issued
2005
Author(s)
Abstract
The crystal structure, magnetic, and transport properties of (Tb/sub 1-x/Na/sub x/)MnO/sub 3/ (0/spl les/x/spl les/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 (Tb/sub 1-x/Na/sub x/)MnO/sub 3/ system shows a magnetic transition around 10, 20, and 30 K for x=0,0.15,and0.3, 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 TbMnO/sub 3/.
SDGs
Type
journal article