@article {48064,
	title = {Formation of zircon-type DyCrO4 and its magnetic properties},
	journal = {Ceramics International},
	volume = {48},
	year = {2022},
	month = {SEP},
	pages = {24666-24676},
	type = {Article},
	abstract = {<p>
	The formation mechanism of hydrolytic sol-gel synthesized DyCrO4 with a complexing agent in acidic and basic mediums is thoroughly studied. The role of complexing agents and pH on phase formation temperature is also intensively investigated. The formation temperature for DyCrO4 is similar to 500 degrees C in the absence and presence of complexing agents such as oxalic acid and ethylenediaminetetraacetic acid (EDTA) at pH 10. When critic acid is used, the DyCrO4 forms with Cr2O3 impurity. The crystallite size in the presence of a complexing agent in the basic medium is similar to 55 nm which is small as compared to only ammonia solution. The various reaction modes lead to tetragonal zircon-type DyCrO4 at similar to 500 degrees C, transforming into orthorhombic perovskite DyCrO3 at 800 degrees C. The magnetization curve shows the ferromagnetic behavior of DyCrO4 below transition temperature T-c similar to 21 K. This low T-c makes nanocrystalline DyCrO4 a potential material for cryogenic applications.</p>
},
	keywords = {Complexing agent, DyCrO4, Formation mechanism, Hydrolytic sol-gel method, pH},
	issn = {0272-8842},
	doi = {10.1016/j.ceramint.2022.05.113},
	author = {Ughade, Supriya and Joshi, Bhavana and Poddar, Pankaj}
}
@article {48672,
	title = {Systematic study of rare-earth ions size-dependent structural phase transition from monazite to zircon-type in rare earth chromates using Raman spectroscopy},
	journal = {Journal of Raman Spectroscopy},
	volume = {54},
	year = {2023},
	month = {JUL},
	pages = {793-801},
	type = {Article},
	abstract = {<p>
	Rare earth chromates (RCrO4) undergo monazite to zircon-type structural phase transition due to a decreased rare-earth ion size. They also exhibit an intermediate mixed phase. However, there is no systematic study on the influence of structural distortion on their phononic behavior, which is quite sensitive to subtle environmental variations. A change in the room temperature phononic spectrum was studied in the family of RCrO4 compounds, where R was varied from La to Yb using Raman modes. With an increase in the atomic number from Nd to Yb for zircon-type phases, the external translational and rotational modes were observed to shift towards lower and higher wavenumbers, respectively. At the same time, all internal vibrational modes shifted towards higher phonon energies. A comparison between Raman modes for monazite, intermediate, and zircon-type RCrO4 phases showed a gradual shift in the internal modes towards a higher wavenumber. The confirmation of the change in Raman modes with the decreasing radius was found by comparing the rare-earth elements in DyCrO4 and LaCrO4 with non-rare-earth elements in YCrO4.</p>
},
	keywords = {monazite-type, Raman spectroscopy, rare earth chromates (RCrO4), YCrO4, zircon type},
	issn = {0377-0486},
	doi = {10.1002/jrs.6542},
	author = {Ughade, Supriya and Poddar, Pankaj}
}
