X-ray absorption near edge structure studies of colossal magnetoresistance ferromagnet (La1.4Sr1.6)Mn2O7

Liu, R.S.; Jang, Ling‐Yun; Chen, J.M.; Wu, J. B.; Liu, R.G.; Lin, J. G.; Huang, Chun‐Hao

doi:10.1016/s0038-1098(98)80003-3

Cited by 15 publications

(2 citation statements)

References 13 publications

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“…In general, valance state of 3d transition metals can be precisely characterized from NEXAFS of L 3,2 -edge. The 3d transition metals also exhibit a valance-specific multiplet structure and chemical shift towards higher energy losses with increasing oxidation state [18,19]. The Mn L 3,2 -edge NEXAFS of the sample with reference compounds MnO and MnO 2 are shown in Fig.…”

Section: Results and Discussion:-mentioning

confidence: 99%

“…As is evident from the figure, the L 3 region comprises spectral features (A 2 -D 2 ) and resembles with MnO (Mn 2+ ) spectral feature indicating +2 valance state for Mn. The spectral features (A1-A3), are assigned to Mn t 2g and e g subbands, respectively [18]. 5 shows the normalized XANES spectra at the Mn K-edge of sample along with reference compounds MnO2 and MnO.…”

Section: Results and Discussion:-mentioning

confidence: 99%

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Synthesis and characterization of self organized SiO2 nano pillar with MnO as the magnetic tip.

Rawat¹,

Kumar²,

Kumari³

2016

IJAR

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Self organized SiO 2 nanopillar with MnO tip have been synthesized over Si substrate by annealing the substrate after putting drop of MnCl 2 (in C 2 H 5 OH and H 2 O) over its surface. The controlled growth of nanopillars has been achieved by annealing as sampled Si substrate at 940 o C in Ar and H 2 gas environment (Ar =150 ml/min, H 2 =75 ml/min) for 2 hour. Synthesized nanopillars are vertical over the silicon substrate. Energy dispersive x-ray (EDX) analysis shows that the pillar structures are formed of Si, O and Mn, wherein the catalyst Mn has been found in the form of MnO at the tip of the nanopillar, inferred from the EDX, X-ray magnetic-circular dichroism (XMCD) and near edge x-ray fine structure (NEXAFS) analysis. HETEM analysis shows the tip as well as the pillars are amorphous. The MnO tip has magnetic nature as concluded by XMCD studies of the samples. Spectral features of Mn K-edge EXAFS reveals that Mn is in 2+ state and coordinated in tetrahedral symmetry. Copy Right, IJAR, 2013,. All rights reserved.

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Section: Results and Discussion:-mentioning

confidence: 99%

Section: Results and Discussion:-mentioning

confidence: 99%

Synthesis and characterization of self organized SiO2 nano pillar with MnO as the magnetic tip.

Rawat¹,

Kumar²,

Kumari³

2016

IJAR

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X‐ray absorption spectroscopic studies of Mn atoms in La_1−xSr_xMnO_3+δ compounds

2002

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Mn K-edge x-ray absorption spectroscopy was used to determine the local structure at the Mn site in LaMnO 3 , La 0.7 Sr 0.3 MnO 3 and La 0.5 Sr 0.5 MnO 3 samples. The x-ray absorption near-edge spectra (XANES) show an intermediate oxidation state of the Mn atoms, the edge position indicating an average valence of ∼3.4 for the LaMnO 3 sample and an average valence of ∼3.7 for the La 0.7 Sr 0.3 MnO 3 and La 0.5 Sr 0.5 MnO 3 samples. Extended x-ray absorption fine structure (EXAFS) analyses show that the local order around Mn atoms in the La 0.7 Sr 0.3 MnO 3 sample can be described as a regular MnO 6 octahedron or as a distorted octahedron with two different Mn -O bond lengths. With regard to the La 0.5 Sr 0.5 MnO 3 sample, the local structure around Mn atoms is appropriately described by a regular MnO 6 octahedron. For this sample, the mean Mn -O bond length is shorter and is similar to that of Mn -O in the SrMnO 3 .

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Polarization resistance and composite cathode of Ce doped SrMnO3 system for intermediate temperature solid oxide fuel cells

2014

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X-ray absorption near edge structure studies of colossal magnetoresistance ferromagnet (La1.4Sr1.6)Mn2O7

Cited by 15 publications

References 13 publications

Synthesis and characterization of self organized SiO2 nano pillar with MnO as the magnetic tip.

Synthesis and characterization of self organized SiO2 nano pillar with MnO as the magnetic tip.

X‐ray absorption spectroscopic studies of Mn atoms in La_1−xSr_xMnO_3+δ compounds

Polarization resistance and composite cathode of Ce doped SrMnO3 system for intermediate temperature solid oxide fuel cells

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X-ray absorption near edge structure studies of colossal magnetoresistance ferromagnet (La1.4Sr1.6)Mn2O7

Cited by 15 publications

References 13 publications

Synthesis and characterization of self organized SiO2 nano pillar with MnO as the magnetic tip.

Synthesis and characterization of self organized SiO2 nano pillar with MnO as the magnetic tip.

X‐ray absorption spectroscopic studies of Mn atoms in La1−xSrxMnO3+δ compounds

Polarization resistance and composite cathode of Ce doped SrMnO3 system for intermediate temperature solid oxide fuel cells

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X‐ray absorption spectroscopic studies of Mn atoms in La_1−xSr_xMnO_3+δ compounds