Magnetic behavior of the Bi2−ySryIr2O7 pyrochlore solid solution

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)(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.