Penetration of high-frequency electromagnetic field through bulk samples of La1−x Sr x MnO3 (0.33 ≤ x ≤ 0.60) manganites

La1−xSrxMnO3 Nanoparticles for Magnetic Hyperthermia

“…The inset in Figure a clearly shows how with increasing T, M S decreases at a given external field in La 0.67 S 0.33 MnO 3 . The numerical calculations are in a good quantitative coincidence with the experimental results . The black squares in Figure a denote experimental data.…”

“…This means that for a given x the substantial change of T C to bio‐compatible levels can be explained by varying the size of NPs . For bulk samples we observe a maximum in saturation magnetization and coercivity for values of x in the range of 0.23 < x < 0.45. For NPs appropriated to in vivo and in vitro medical applications M S decreases with reduction of the particles' size while in the coercivity H C we observe a maximum (only if there is transition from multi‐domain to single‐domain magnetic NPs) .…”

“…Dependence of M S on the dopant concentration x for bulk samples: a) for H = 5 kOe and different T ‐values: 1) 5 K; 2) 100 K; 3) 200 K, and 4) 225 K; the inset shows M S ( H ) at different temperatures for x = 0.33, b) for H = 100 Oe, and T : 1) 100 K; 2) 200 K, and 3) 300 K. The black squares in Figure a denote experimental data from Refs. .…”

Imperfection of the clustered perovskite structure, phase transitions, and magnetoresistive properties of ceramic La0.6Sr0.2Mn1.2 − x Ni x O3 ± δ (x = 0–0.3)

“…2. The substitution of nickel for manganese leads to a decrease in the ferromagnetic ordering tem perature T C , which is determined both from the tem perature of the maximum in the dependence It should be noted that there is a weak temperature smearing ΔT C of the magnetic phase transition in our samples as compared to other ceramic samples of lan thanum strontium manganite perovskites with close compositions of the parent structure [23].…”