Study of phase separation phenomena in half-doped manganites with isovalent substitution of rare-earth cations on example of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Sm</mml:mi><mml:mrow><mml:mn>0.32</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi>Pr</mml:mi><mml:mrow><mml:mn>0.18</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi>Sr</mml:mi><mml:mrow><mml:mn>0.5</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi>MnO</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml

Курбаков, А. И.; Ryzhov, V. A.; Runov, V. V.; Bykov, Eduard; Larionov, I. I.; Deriglazov, V. V.; Martin, C.; Maignan, A.

doi:10.1103/physrevb.100.184424

Cited by 15 publications

(3 citation statements)

References 40 publications

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“…According to earlier studies of the Ag-doped LCMO system, which are consistent with the current work, doping enhanced the CMR effect considerably, which is connected to the presence of two competing magnetic phases [59][60][61]. The phase separation, also known as PS, is the presence of two or more magnetic/electrical distinct phases inside a single compound and is a critical factor in controlling the CMR effect of doped perovskite manganese oxides [62][63][64]. Previous studies discovered that substituting niobium in perovskites considerably affected structural, magnetic, and magnetocaloric characteristics, which agrees with the presented current magnetic results [65][66][67].…”

Section: Magnetic Properties and Magnetocaloric Effectsupporting

confidence: 88%

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

Smari,

Moualhi,

Tong

et al. 2024

Phys. Scr.

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The crystal structure, XPS, magnetic characteristics, and magnetocaloric performance of perovskite La0.55Ca0.45Mn0.8Nb0.2O3(LCMNO) ceramic powder were analyzed. The orthorhombic structure with a Pnma space group was found as the main phase in the as-received compound after the XRD pattern refinement. The mixed-valence states of manganese were detected by X-ray photoemission spectroscopy (XPS). The analysis of the La3d line revealed the complex nature of the lanthanum states. The evaluation of ZFC and FC magnetization performance provided conclusive evidence for the existence of the antiferromagnetic Mn3O4 phase at a temperature of TN= 42K and the coexistence of CO- AFM and FM domains in LCNMO. Despite the observed significant (δTFWHM) value due to relatively low magnetic entropy change (SM), the relative cooling power (RCP) is relatively moderate. By adding Nb4+, the changes in Mn valences and their effect on the magnetic cooling effect are lessened.

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Section: Magnetic Properties and Magnetocaloric Effectsupporting

confidence: 88%

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

Smari,

Moualhi,

Tong

et al. 2024

Phys. Scr.

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“…Above this temperature, the system adopts rhombohedral structure and recovers homogeneity. Similar structurally and magnetically inhomogeneous states were also observed in some intermetallic systems like Gd 5 (Si x Ge 1−x ) 4 [9,10,37,38], Si-doped CeFe 2 [39], MnAs [1,40], and generally found in the colossal magnetoresistive manganese-based perovskites, where they are often called phase-segregated states [41,42].…”

Section: X-ray Powder Diffraction In Applied Magnetic Fieldsmentioning

confidence: 59%

Magnetic-field-induced structural phase transition and giant magnetoresistance in La0.85Ce0.15Fe12B6

Diop

Faske

Isnard

et al. 2021

Phys. Rev. Materials

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Magnetoelastic coupling, structural, magnetic, electronic transport, and magnetotransport properties of La 0.85 Ce 0.15 Fe 12 B 6 have been studied by a combination of macroscopic [magnetization, electrical resistivity, and magnetoresistance (MR)] and microscopic temperature-and magnetic-field-dependent x-ray powder diffraction measurements. The itinerant-electron system La 0.85 Ce 0.15 Fe 12 B 6 exhibits an antiferromagnetic (AFM) ground state and multiple magnetic transitions, AFM-ferromagnetic (FM) and FM-paramagnetic (PM), triggered by changes in both temperature and magnetic fields. At low temperatures, the field-induced first-order AFM-FM metamagnetic phase transition is discontinuous, manifesting itself by extremely sharp steps in magnetization as well as in MR and is accompanied by large magnetic hysteresis. A remarkably large negative MR of −73% was discovered. In addition, the time evolution of the electrical resistivity displays a colossal spontaneous jump when both the applied magnetic field and temperature are constant. Diffraction data reveal a magnetic-field-induced structural phase transition associated with the AFM-FM and PM-FM transformations. The lattice distortion is driven by magnetoelastic coupling and converts the crystal structure from rhombohedral (R 3m) to monoclinic (C2/m). The AFM and PM states are related to the rhombohedral structure, whereas the FM order develops in the monoclinic symmetry. A huge volume magnetostriction of ∼0.9% accompanies this symmetry-lowering lattice distortion. Meanwhile, a highly anisotropic thermal expansion involving giant negative thermal expansion with an average volumetric thermal expansion coefficient α V = −195 × 10 −6 K −1 was observed. The consistency seen in these different experimental data constitutes direct evidence of the strong correlations between charge, magnetic, and crystallographic degrees of freedom in this material.

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“…Temperature dependence of the mean cell volume per formula unit determined from x-ray powder diffraction measurements during heating and cooling in μ 0 H = 2.5 and 5.5 T applied magnetic fields. magnetoresistive manganese-based perovskites, where they are often called "phase-segregated states" [44,45].…”

Section: Temperature and Magnetic Field-dependent X-ray Diffractionmentioning

confidence: 99%

Evidence for a coupled magnetic-crystallographic transition in La0.9Ce0.1Fe12B6

et al. 2021

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Competition between antiferromagnetic (AFM), paramagnetic (PM), and ferromagnetic (FM) states in La 0.9 Ce 0.1 Fe 12 B 6 compound is investigated by means of temperature-and magnetic field-dependent x-ray diffraction, magnetization, linear thermal expansion, and magnetostriction experiments. It is shown that both AFM and PM phases get converted into the FM phase via a first-order metamagnetic transition, which is accompanied by a huge forced-volume magnetostriction V/V (25 K, 6 T) = 1.15%. X-ray powder diffraction reveals a magnetic field-induced crystallographic phase transition from a R 3m rhombohedral (AFM, PM) to a C2/m monoclinic (FM) structure. A peculiarly anisotropic lattice expansion as well as giant negative thermal expansion with a volumetric thermal expansion coefficient α V = −193 × 10 -6 K -1 are observed. These findings point to the significance of magnetoelastic effects in this metamagnet and illustrate the strength of the coupling between lattice and spin degrees of freedom in the La 0.9 Ce 0.1 Fe 12 B 6 intermetallic compound.

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Study of phase separation phenomena in half-doped manganites with isovalent substitution of rare-earth cations on example ofSm0.32Pr0.18Sr0.5MnO3

Cited by 15 publications

References 40 publications

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

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

Magnetic-field-induced structural phase transition and giant magnetoresistance in La0.85Ce0.15Fe12B6

Evidence for a coupled magnetic-crystallographic transition in La0.9Ce0.1Fe12B6

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Study of phase separation phenomena in half-doped manganites with isovalent substitution of rare-earth cations on example ofSm0.32Pr0.18Sr0.5MnO3

Cited by 15 publications

References 40 publications

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

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

Magnetic-field-induced structural phase transition and giant magnetoresistance in La0.85Ce0.15Fe12B6

Evidence for a coupled magnetic-crystallographic transition in La0.9Ce0.1Fe12B6

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

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