In this article, the collective response of the spins is explored through low field bulk magnetic measurement for the series YMn2−xCrxO5 (x= 0.0, 0.05). Low field ac susceptibility and dc magnetization of YMn2O5 shows multiple transition in analogy to those observed in electrical measurement of the compound. Using various time dependent magnetization protocols it has been observed that the behavior of spins in commensurate and incommensurate phase are drastically different. YMn1.95Cr0.05O5 undergoes a ferrimagnetic ordering with an enhanced magnetic ordering temperature as compared to the parent, which undergoes an antiferromagnetic ordering. Appearance of spontaneous magnetization without any major change in the atomic structure is rather significant since the parent compound is an important multiferroic material. In addition, magnetic memory effect is observed in the Cr substituted compound whereas it is absent in the parent compound.
@article{arxiv.1206.1446,
title = {Observation of different spin behavior with temperature variation and Cr substitution in a multiferroic compound YMn$_2$O$_5$},
author = {K. Mukherjee and Kranti Kumar and A. Banerjee},
journal= {arXiv preprint arXiv:1206.1446},
year = {2015}
}