Magnetic and magnetocaloric properties of bilayered perovskite manganite(La<sub>0.9</sub>Eu<sub>0.1</sub>)<sub>4/3</sub>Sr<sub>5/3</sub>Mn<sub>2</sub>O<sub>7</sub>

Abstract

La 0.9 Eu 0.1 ) 4/3 Sr 5/3 Mn 2 O 7 polycrystalline sample was prepared by solid state reaction method. The magnetic and magnetocaloric properties have been studied. The competition between FM and AFM interactions was observed at low temperature range, and the coexistence of FM and PM was found in the temperature range of T c 3D -T c 2D for this compound. In addition, the magnetic entropy change under 1 T magnetic field is up to 1.69 J/(kg K), which suggests that such materials may be applied to magnetic refrigeration in the temperature range of liquid hydrogen.