02424nas a2200265 4500008004100000022001400041245012000055210006900175260000800244300001100252490000800263520154000271653002201811653001801833653001801851653001601869653001701885653002601902100002001928700002101948700001901969700001901988700002602007856012502033 2025 eng d a0921-452600aInfluence of ionic radius on structural, optical and multiferroic properties of RMnO3 [R= Y, Er, Yb] hexamanganites0 aInfluence of ionic radius on structural optical and multiferroic cOCT a4174960 v7143 a

The crystalline samples of YMnO3, ErMnO3, and YbMnO3 were synthesized by a conventional solid-state reaction technique. The single-phase hexagonal structure with the P63cm space group was verified by X-ray diffraction (XRD) study. Morphological studies show that the grains are uniform and closely packed, and that the grain size increases as the ionic radii of the rare-earth ions decrease of rare earth ions and the samples are in the stoichiometry. From the Diffused Reflectance Spectroscopy study, narrow optical band gap is observed for all the samples. Magnetic phase transitions, corresponding to the antiferromagnetic ordering, were detected for all samples. The Neel temperature was found to increase with the decrease of the ionic radii of A site element in RMnO3 (Y, Er, and Yb) samples. Ferroelectric hysteresis loops at room temperature as a function of applied electric fields reveal the leaky behaviour. The dielectric constant and dielectric loss tangent variation across different frequencies are also explored for these samples. A summary and discussion of the structural, optical, magnetic and ferroelectric properties, underlying physical mechanisms, the role of the rare earth ions, and the complex interactions in hexagonal manganites, are presented in this paper. This work emphasizes how systematic variation of A-site ionic radii influences the multiferroic properties of RMnO3, gaining thorough insights into structure-property relationships that are essential to design multifunctional materials.

10aAntiferromagnetic10aferroelectric10aMultiferroics10aPerovskites10aPhotovoltaic10aRecombination centers1 aInchara, D., R.1 aSingh, Kirandeep1 aSangole, Mayur1 aMurari, M., S.1 aDaivajna, Mamatha, D. uhttps://library.ncl.res.in/content/influence-ionic-radius-structural-optical-and-multiferroic-properties-rmno3-r-y-er-yb