Abstract
To enhance the quality of applications of LaFeO3 (LFO) as a magnetoelectric multiferroic through the improvement of magnetic behaviour, co-doping of Nd3+ (20 %) and V5+ (5 %) was considered for partial substitution in place of La3+ and Fe3+, respectively. Co-doped sample of La0.8Nd0.2Fe0.95V0.05O3 (LNFVO) was prepared by solid state reaction method. Rietveld analysis of X-ray diffractograms confirmed the formation as well as successful incorporation of dopants (Nd3+ and V5+) in La3+ and Fe3+ sites of the distorted perovskite structure with Pbnm space group. Morphological features including information related to crystallographic phase were examined by TEM. Distortion due to co-doping helped to achieve the stated objectives. Valence states of dopants and host cations were explored by analyzing XPS observations. Detailed magnetic measurements in the temperature range starting from 300 K down to 2 K suggested that magnetic property was drastically enhanced compared to that of the undoped, which was attributed to mismatch of valence states, ionic diameters etc. between dopants with host cations. The doped sample showed antiferromagnetic to ferromagnetic transition at and below 19 K. All such findings related to magnetic property would be quite attractive for the improvement of multiferroic applications as the low value of magnetization of pristine sample of LFO restrict it to become a good magnetoelectric multiferroic.
Published Version
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