The temperature dependence of magnetic susceptibility of the Bi2−ySryIr2O7 system was studied from 2 to 300 K. According to these measurements, the solid solution (0≤y≤0.9) does not show any magnetic transition; however, a noticeable deviation from the Curie-Weiss law occurs and the magnetic behavior of this system can be ascribed to short-range magnetic order that is also present in several geometrically frustrated systems. The Pauli magnetic susceptibility decreases as the Sr content increases, this can be associated with a shift towards Ir5+ in samples; also the Ir effective magnetic moment decreases. The estimated Wilson-ratio indicates the presence of strong electron-electron correlations.
@article{arxiv.1301.2720,
title = {Magnetic Behaviour of the $Bi_{2-y} Sr_y Ir_2 O_7$ Pyrochlore Solid Solution},
author = {C. Cosio-Castaneda and P. de la Mora and F. Morales and R. Escudero and G. Tavizon},
journal= {arXiv preprint arXiv:1301.2720},
year = {2015}
}