Abstracts Book - IMRC 2018

• SF1-P005
STUDY OF PHYSICAL PROPERTIES OF La0.67Ca0.33-xSrxMnO3
COMPOUND (x=0 to 0.04)
Verónica E. Salazar Muñoz 1 , S. A. Palomares Sánchez 1 , Azdrubal Lobo Guerrero Serrano 2 , Jose
T. Elizalde Galindo 3 , Rigoberto López Juárez 4 , Vicente Damián Compeán García 5
1 Universidad Autónoma de San Luis Potosí, Facultad de Ciencias, Mexico. 2 Universidad
Autónoma del Estado de Hidalgo, Área Académica de Ciencias de la Tierra y Materiales,
Mexico. 3 Universidad Autónoma de Ciudad Juárez, Departamento de Ciencias Básicas-Instituto
de IngenierÍa y TecnologÍa, Mexico. 4 Universidad Autónoma de la Ciudad de México, Unidad
Morelia, Instituto de Investigación en Materiales, Mexico. 5 Conacyt - Universidad Autonoma de
San Luis Potosi, Coordinación para la Innovación y Aplicación de la Ciencia y la Tecnología
(CIACYT), Mexico.
There has been growing interest in the development of materials for magnetic
refrigeration technology as they provide an environmentally friendly option to
replace chlorofluorocarbons and hydrochlorofluorocarbons as refrigerant
medium. Magnetic refrigeration technology is based on the magnetocaloric
effect, where magnetization-demagnetization cycles produce an entropy change
allowing remove heat in a close system. The lanthanum manganite could
become an alternative material for magnetic refrigeration since it has high
chemical stability, and low-cost fabrication process. It has been reported that
when some cations are replaced in the crystalline structure of the lanthanum
manganite, Curies temperature approaches to room temperature, in addition
the delta of magnetic entropy increases. In this work results of the study of
manganite lanthanum compound with substitution of alcalinoterrum atoms,
calcium and strontium on its crystal structure are presented. The compound
La 0.67 Ca 0.33-x Sr x MnO 3 (x=0 and 0.08) were sintered by two distinct ways, the solid
state reaction and the Pechini method, obtaining micro and nanoparticles each
method, respectively. The structure’s properties and the crystal size were
evaluated by X-ray diffraction and Rietveld refinement in function of the
synthesis method. The effect of the particle size on the magnetic properties was
also analyzed.
Acknowledgment: We thank CONACYT (México) for the support given to carry
out this work. Thanks also to M.M.I.M. Rosa Lina Tovar T. of Metalurgy Institute
of the Universidad Autónoma de San Luis Potos, SLP, México, for technical
support.
Keywords: Lanthanum manganite, Pechini method, Magnetic properties
Presenting authors email: veronica.salazar900203@gmail.com