Abstract
In recent times, LuFeO3 is found to be an interesting material exhibiting room temperature multiferroic properties both in its stable orthorhombic and meta-stable hexagonal phase [1, 2]. To stabilize the single phase and also to enhance the magnetic and ferroelectric properties rare earth doping is a possibility [3, 4]. In this work, magnetic rare earth atom, Holmium is doped in place of Lu, the structural, magnetic and ferroelectric properties are investigated. Bulk nanocrystallineLu0.9Ho0.1FeO3 compound is synthesized by hydrothermal method. Doping with ionic radius larger than Lu, helps to stabilize the structure in a stable orthorhombic- Pnma phase. Rietveld refinement of structural data is carried out on the synthesized sample and the lattice parameters are found to be increasing as expected. Also, Ho being an element with a large magnetic moment, the effect of doping on magnetic properties is investigated. M-H isotherms didn’t saturate even at magnetic field, H= 9T reflecting a strong antiferromagnetic interaction that arises from the super exchange Fe3+-O-Fe3+ interactions. Finite remnant and coercivity values obtained from the M-H loop measured at 300 K confirms that the TN lies above room temperature (RT). Observation of P-E loop at 300 K confirms ferroelectric ordering at RT.
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