Magnetoimpedance spectroscopy of phase-separated La_0.5Ca_0.5MnO₃ polycrystalline manganites

Abstract

Magnetoimpedance spectroscopy was carried out on phase-separated La0.5Ca0.5MnO3 polycrystalline manganites.

Enhancement of the Magnetotransport Behavior in a Phase-Separated LaAgCaMnO3 Polycrystalline: Unraveling the Role of a Multi-Double-Exchange Mechanism

“…Refinements of the oxygen content 3-δ were performed and the best fit was obtained for δ = 0263 (1) , where the experimental error of the refinement is indicated in parentheses. On the other hand, the oxygen deficiency that was extracted from the XPS analysis gives δ = 0489 (6) .…”

“…Colossal magnetoresistance (CMR), charge ordering (CO), important magnetocaloric effect (MCE) around room temperature, and insulator–metal transition (IMT) properties have created a tremendous interest in perovskite-type R 1–x A x MnO 3 oxides (R = rare earth and A = divalent cation) or the so-called doped manganite oxides. − However, these interesting properties are originated from the net interplay between orbital/spin, charge, and the lattice . Typically, the pure RMnO 3 compounds are antiferromagnetic (AFM) insulators; after doping, a mixed valence resulting from the coexistence of Mn 3+ (t 3 2g eg 1 ) and Mn 4+ (t 3 2g) ions appears, and various magnetic interactions arise upon partial substitution within the same material, that is, the competition between the AFM superexchange state and the ferromagnetic (FM) state in terms of double-exchange (DE) interactions. , …”

“…1−3 However, these interesting properties are originated from the net interplay between orbital/spin, charge, and the lattice. 4 Typically, the pure RMnO 3 compounds are antiferromagnetic (AFM) insulators; after doping, a mixed valence resulting from the coexistence of Mn 3+ (t 3 2g eg 1 ) and Mn 4+ (t 3 2g) ions appears, and various magnetic interactions arise upon partial substitution within the same material, that is, the competition between the AFM superexchange state and the ferromagnetic (FM) state in terms of double-exchange (DE) interactions. 5,6 The coexistence of two or more magnetic/electrical different phases within the same compound was ascribed as the phase separation (PS) phenomenon, which plays a crucial role in tuning the CMR effect of doped perovskite manganese oxides.…”

Magnetic effect and chemical distribution study of LCMNO3 perovskite by photoelectron spectroscopy

“…Manganite, manganese-based perovskites with the general formula R 1−x A x MnO 3 (R-Trivalent rare earth; A-divalent ion), have piqued the interest of researchers because of their massive magnetoresistance, charge ordering (CO), orbital ordering (OO), phase separation, and spin-glass behavior [1][2][3][4][5][6][7][8]. These features may be controlled by varying the type and concentration of trivalent rare-earth or divalent alkaline-earth cations, which influence crystal structure deformation and e .g.…”

Effect of Co‐Doping on the Structural and Dielectric Properties of La0.8K0.2MnO3 Perovskite

“…This confirms the results obtained in the conductance study. [ 39,40 ] The high values of are mainly comes from the presence of a space–charge zone induced by the interface between the grains and the GBs. These values can also be referred to the existence of different polarization types as ionic, dipolar, and interfacial polarizations present in our manganites.…”