Antiferromagnetism of Double Molybdate LiFe(MoO$_4$)$_2$
Meifeng Liu, Yang Zhang, Tao Zou, V. Ovidiu Garlea, T. Charlton, Yu, Wang, Fei Liu, Yunlong Xie, Xiang Li, Lun Yang, Biwen Li, Xiuzhang Wang,, Shuai Dong, Jun-Ming Liu
TL;DR
This study investigates the magnetic properties of LiFe(MoO$_4$)$_2$, revealing a single antiferromagnetic transition at 23.8 K and confirming its magnetic structure through experimental and computational methods.
Contribution
It provides the first detailed characterization of the antiferromagnetic structure and exchange interactions of LiFe(MoO$_4$)$_2$ using combined experimental and theoretical approaches.
Findings
Single antiferromagnetic transition at 23.8 K
Determined magnetic structure with propagation vector (0, 0.5, 0)
Density functional theory confirms antiferromagnetic ground state
Abstract
The magnetic properties of the spin-5/2 double molybdate LiFe(MoO) have been characterized by heat capacity, magnetic susceptibility, and neutron powder diffraction techniques. Unlike the multiferroic system LiFe(MoO) which exhibits two successive magnetic transitions, LiFe(MoO) undergoes only one antiferromagnetic transition at ~ 23.8 K. Its antiferromagnetic magnetic structure with the commensurate propagation vector k = (0, 0.5, 0) has been determined. Density functional theory calculations confirm the antiferromagnetic ground state and provide a numerical estimate of the relevant exchange coupling constants.
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