Effect of Ru substitution on the physical properties of La0.6Pr0.1Sr0.3Mn1−xRuxO3 (x = 0.00, 0.05 and 0.15) perovskites
Abstract
Morphology, magnetic, and magnetocaloric properties of La0.6Pr0.1Sr0.3Mn1−xRuxO3 (x = 0.00, 0.05 and 0.15) were experimentally investigated. A solid-state reaction method was used for the preparation of the samples. The microstructure of the samples was determined by scanning electron microscopy SEM. Field-cooled (FC) and zero-field-cooled (ZFC) thermomagnetic curves measured at low field and low temperatures exhibit a cluster spin state. A sensitive response to substituting Ru for Mn is observed in the magnetic and magnetocaloric properties. We found that Ru doping is not powerful enough to reduce the Curie temperature TC, however, it brings about cluster glass behaviors. A magneto-caloric effect has been calculated in terms of isothermal magnetic entropy change. The maximum entropy change |ΔSmaxM| reaches the highest values of 3.32 J kg−1 K−1, 3.11 J kg−1 K−1 and 2.57 J kg−1 K−1 in a magnetic field. However, the relative cooling power decreases with Ru content from 227.44 J kg−1 to 214.14 J kg−1 and then to 188.68 J kg−1 for x = 0.00, 0.05 and 0.15 compositions, respectively.
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