Structural, magnetic and magnetocaloric properties of layered perovskite La1.1Bi0.3Sr1.6Mn2O7

• A new compound La1.1Bi0.3Sr1.6Mn2O7 has been synthesized by the co-precipitation method.
• The PM–FM transition around Tc is of 2nd order.
• The (−∆Smax) and the RCP are, 1.65 J kg−1K−1 and 134.4 J kg−1 respectively, for a 5 T magnetic field change at 340 K.

The La1.1Bi0.3Sr1.6Mn2O7 sample was synthesized by coprecipitation method. Its structure has been characterized by X-ray powder diffraction. The diffraction patterns are consistent with the I4/mmm symmetry, with tetragonal lattice parameters a=3.8750±0.0001 Å and c=20.0456±0.0002 Å. Magnetic measurements have shown a ferromagnetic like ordering with second order magnetic phase transition to paramagnetic states. The magnetic entropy change caused by a magnetic field, (−∆Smax), was estimated on the basis of the Maxwell relation. The maximum magnetic entropy change (−∆Smax) and the relative cooling power (RCP) are, 1.65 J kg−1K−1 and 134.4 J kg−1 respectively, for a 5 T magnetic field change at 340 K.