Structural and magnetic heterogeneities, phase transitions, and magnetoresistance and magnetoresonance properties of the composition ceramic La0.7Pb0.3 − x Sn x MnO3

Smart magnetic nanopowder based on the manganite perovskite for local hyperthermia

“…Using equation: It should be also noted that there are two 55 Mn and 139 La centers of the NMR signal in the synthesized smart magnetic La 0.6 Ag 0.2 Mn 1.2 O 3 nanopowder. In the FM state at T < T C (42 C), the formation of the NMR spectrum on 55 Mn nuclei (the gyromagnetic ratio g Mn ¼ 10.560 MHz/T) 65 occurs under the inuence of the hyperne interaction eld H HIF ¼ 34-38 T. 36 The eld on 139 La nuclei (g La ¼ 6.014 MHz/T) 66 has a dipole-dipole character and is in the range H dd ¼ 2.3-3.7 T. 65,67 In the PM state (T > T C ), during MRI studies, the eld on the 55 Mn and 139 La NMR nuclei decreases to $1.5 T of the tomograph eld. Such a variety of magnetic resonance properties of the synthesized La 0.6 Ag 0.2 Mn 1.2 O 3 nanopowder operating at the intracellular level additionally opens up great prospects for its use as novel MRI contrast agents for tumor theranostics, which combine the properties of both therapeutic and diagnostic agents.…”