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We have observed enhancement and shift in the spin reorientation transitiontemperature as a consequence of coexistence of orthorhombic and hexagonalphases and higher aspect ratio in nanoscale LuFeO3. Nanoparticles andnanofibers of LuFeO3 are considered for this work. Nanoparticles have 75 %orthorhombic phase and 25 % hexagonal phase, while nanofibers have 23%orthorhombic phase and 77%-hexagonal phase. Larger aspect ratio in case ofnanofibers is seen to help strain-stabilize the hexagonal phase in thematerial. Magnetic measurements show significant difference in the magneticbehavior and spin reorientation temperature; 183K for the nanoparticle case and150K for the case of nanofibers. Moreover, the ferromagnetic moment is twoorder of magnitude higher for nanofibers than that of nanoparticles, Inhexagonal phase, frustration of triangular lattice, works against the longrange ordering while magnetic anisotropy works in favor of the long rangeordering, which contributes towards the enhanced and anomalous magneticbehavior in case of fibers. X -ray absorption near edge spectroscopy (XANES) atthe Fe K-edge has been used to probe the symmetry driven dynamics of Fe 3d- 4porbitals. It established that due to noncentrocymmetry of the Fe atom, thenanofibers have decreased 3d-4p orbital mixing and reduced crystal fieldsplitting energy, which are also contributing factor for the enhanced magneticbehaviour.

Tunable magnetization in nanoscale LuFeO3: Role of morphology, ortho-hexa phase ratio and local structure