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We report temperature dependent electron paramagnetic resonance (EPR) studies on polycrystalline YCrO₃ samples at X-band (9.46 GHz) in the temperature range of 120 K to 298 K. The EPR spectra exhibit a single broad line across the whole temperature range, attributed to Cr³⁺ ions. The variation of EPR spectra parameters (line width, integrated intensity, and g-factor) as a function of temperature was analyzed to understand the nature of spin-dynamics in the paramagnetic region of YCrO₃. A peak in the g-factor suggests the presence of a new phase within the paramagnetic state at an intermediate point of temperature <i>T</i>_IP ~ 230 K, attributed to the onset of short range canted antiferromagnetic correlations in the material much above 140 K, Néel temperature (<i>T</i>_N) of YCrO₃. The EPR intensity increases with a decrease in temperature up to <i>T</i>_N due to the renormalization of the magnetic moments arising from the appearance of canted antiferromagnetic correlations. Further, temperature dependent dielectric measurements also exhibit an anomaly at ~ 230 K suggesting the presence of magnetodielectric coupling in YCrO₃, with a possibility towards a relatively high temperature magnetodielectric system.

THBP-GFO nanocrystals with novel structural symmetry demonstrate impressive self-cleaning property.

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