Shukla, R.; Bedekar, V.; Yusuf, S. M.; Srinivasu, P.; Vinu, A.; Tyagi, A. K.
ABSTRACT
Nanocrystalline HoCrO4 powder was synthesized by a combustion technique using glycine and citric acid as the fuels in different oxidant-to-fuel ratios. Fuel-deficient glycine-nitrate combustion reaction resulted in zircon type
HoCrO4 free from HoCrO3 phase. The crystallite size for the phase pure product after calcination at 575oC in oxygen atmosphere was found to be 34 nm by X-ray line broadening. The TEM observations showed highly porous structure. Magnetic measurements
reveal the ferromagnetic nature of HoCrO4 nano particles with Tc = 18 K. The compound shows high remanence of 30.4 emu·g−1 and low coercivity of −0.0343 T.