Structural, magnetic and magnetocaloric properties of Nanostructured La0.5Bi0.2Sr0.3MnO3 perovskites

Tuning magnetic and magnetocaloric properties of Pr0.6Sr0.4MnO3 through size modifications

“…A substantial reduction in the D has been noticed in the initial stage of ball milling up to 90 min and thereafter the D appears to level off, while the e manifests a monotonous increase up to 120 min of ball milling and then reaches a steady value. A similar variation in D and e with t m has been observed in case of La 0.8 Sr 0.2 MnO 3-d [44], La 0.7 Sr 0.3 MnO 3 [38], and Bi-doped La 0.7 Sr 0.3-MnO 3 [39,40]. The significant changes in the D and e during the commencing state of ball milling could be attributed to the enhanced rate of dislocation densities and defects induced due to the constant collision between the sample mass and balls with the walls of the vials [44][45][46].…”

“…The value of a/H increases with a decrease in D, specify the growth in the structural defects with size reduction, while K exhibits a decrease probably due to the disorder in the core of the nanoparticles [57]. Similar variation in a/H and K has been previously noticed in the case of LSMO manganites [38][39][40]. Additionally, a large drop in the magnitude of M S from 3.6 to 0.5 l B / f.u.…”

“…Pr 0.6 Sr 0.4 MnO 3 (PSMO) nanoparticles were prepared in a two-step process by using the top-down approach [38][39][40]. The polycrystalline bulk sample prepared by solid-state reaction method [41] was subjected to high-energy ball milling to get the nanosized sample.…”

“…The detailed methodology has been described in our earlier papers [38][39][40][41]. In the present study, 10 mm tungsten carbide balls were used and the ball mass to sample mass ratio was maintained at 20:1.…”

“…Further using the law of approach to saturation (LAS) fit [38][39][40]55] given to the demagnetization curves in the first quadrant (Supplementary file SI), an estimate of M S , uniaxial magnetocrystalline anisotropy parameter (K) [56], and structural defects parameter (a/H) has been obtained. The LAS fit given to the M-H data at 3 K and the fitting parameters are described in the supplementary file (SI).…”