In this digest, we explore the structural, magnetic, and magnetocaloric characteristics of the Ruddlesden-Popper (RP) manganite La1.34Sr1.66Mn2O7 synthesized via the solid-state reaction method. The X-ray diffraction analysis reveals a tetragonal crystal structure with space group I4/mmm. The sample exhibits a metal-to-insulator transition at T-{mathrm {MI}} = 128.47 K at 0 T and 183.07 K at 8 T. Magnetization measurements reveal a paramagnetic (PM)-to-ferromagnetic (FM) transition at T-{C} , which is 113 K at 0.01 T and shifts to 164 K at 7 T. The magnetocaloric performances are assessed by calculating the maximum magnetic entropy change (Delta S-{m} ), relative cooling power (RCP), and temperature-averaged entropy change (TEC) with a 5 K increment. Delta S-{m} is 0.6, 3.0, and 3.7 J/kgK under a magnetic field of 0.5, 4, and 7 T, respectively, attributed to the establishment of long-range FM ordering with increasing magnetic field. Proper FM ordering results in the broadening of the ({delta T}-{mathrm {FWHM}} ), enhancing the RCP from 12.12 to 201.45 J/kg with a field change from 0.5 to 7 T. The TEC value is maximum at lower Delta T-{H-C} values, 4.12 (3.00) J/kgcdot K for 7(4) T.

Peer reviewed