Cetin, Selda KiliAcet, MehmetGunes, MustafaEkicibil, AhmetFarle, Michael2025-01-062025-01-0620150925-83881873-466910.1016/j.jallcom.2015.07.2172-s2.0-84939164608https://doi.org/10.1016/j.jallcom.2015.07.217https://hdl.handle.net/20.500.14669/2701We present an investigation on structure, magnetic and magnetocaloric properties of the perovskite manganites (La1-xSmx)(0.67)Pb0.33MnO3 (x = 0, 0.1, 0.2, 0.3) synthesized by sol-gel technique. The XRD patterns show that all synthesized samples have reflections typical of the perovskite structure with orthorhombic symmetry. Thermomagnetic measurements showed that all the samples display a paramagnetic-ferromagnetic transition with decreasing temperature. The Curie temperature decreases with increasing Sm content from 358 K for x = 0-286 K for x = 0.3. We determined the isothermal magnetic entropy changes of all the samples from the magnetization measurements and furthermore measured the adiabatic temperature change of the sample for x = 0.3 directly. The results showed that the adiabatic temperature change, determined using together the entropy change and the specific heat and the value obtained by direct temperature change measurements both give 1.3 K for a magnetic field change of 3 T at about 280 K. We also measured the cyclic adiabatic temperature-change of the sample and the results indicate that the sample undergoes a reversible temperature-change on field-cycling which is essential for magnetic refrigeration. (C) 2015 Elsevier B.V. All rights reserved.eninfo:eu-repo/semantics/closedAccessManganitesMagnetocaloric effectCurie temperatureMagnetic entropyAdiabatic temperature changeArticle294Q1285650WOS:000361519300041Q1