A comprehensive facility for EXAFS measurements at the INDUS-2 synchrotron source at RRCAT, Indore, India

Basu, Sourav; Nayak, Chandrani; Yadav, Ashok K.; Agrawal, Ankur; Poswal, A.K.; Bhattacharyya, D.; Jha, S. N.; Sahoo, N. K.

doi:10.1088/1742-6596/493/1/012032

Cited by 150 publications

(99 citation statements)

References 7 publications

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“…XAS experiment X-ray absorption measurements for Ni K edge of the monodispersed NC Ni samples in the above pellet forms were carried out at the scanning extended X-ray absorption fine structure (EXAFS) beamline (BL-9) at the INDUS-2 synchrotron radiation source (2.5 GeV, 100 mA) of the Raja Ramanna Centre for Advanced Technology, Indore, India [47]. The beamline covers a photon energy range of 4-25 KeV and has a resolution of 10,000 at 10 KeV.…”

Section: Discussionmentioning

confidence: 99%

Size-Induced Structural Phase Transition at ∼6.0 nm from Mixed fcc–hcp to Purely fcc Structure in Monodispersed Nickel Nanoparticles

et al. 2016

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We have investigated the core issue of atomic lattices in monodispersed Ni nanoparticles (NPs) of sizes 3.8 nm to 10.1 nm using detailed analysis of X-ray diffraction, synchrotron radiation X-ray absorption spectroscopy (XAS) and magnetization data. This has revealed the very remarkable coexistence of atomic face-centered cubic (fcc) and hexagonal closed-packed (hcp) lattices in samples with particle size ≤ 6.0 nm with the prevalence of only fcc phase beyond this. They are also associated with reduced coordination number, modified electronic structure, and surface atom coordination with ligands. Magnetization data furthermore reveal coexistence of ferromagnetism and superparamagnetism at 300 K. Considered to be due to dominant roles of ligands, they are likely to open up far-reaching implications to their future applications.

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Section: Discussionmentioning

confidence: 99%

Size-Induced Structural Phase Transition at ∼6.0 nm from Mixed fcc–hcp to Purely fcc Structure in Monodispersed Nickel Nanoparticles

et al. 2016

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“…29, 30 The beamline optics consist of a Rh/Pt coated collimating meridional cylindrical mirror and the collimated beam reflected by the mirror is monochromatized by a Si(111) (2d=6.2709) based double crystal monochromator (DCM). The second crystal of the DCM is a sagittal cylindrical crystal which is used for horizontal focusing of the beam while another Rh/Pt coated bendable post mirror facing down is used for vertical focusing of the beam at the sample position.…”

Section: B Characterizationmentioning

confidence: 99%

X-ray absorption spectroscopy of Mn doped ZnO thin films prepared by rf sputtering technique

et al. 2015

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A set of r.f. sputter deposited ZnO thin films prepared with different Mn doping concentrations have been characterised by Extended X-ray Absorption Fine Structure (EXAFS) and X-ray Absorption Near Edge Spectroscopy (XANES) measurements at Zn, Mn and O K edges and at Mn L2,3 edges apart from long range structural characterisation by Grazing Incident X-ray Diffraction (GIXRD) technique. Magnetic measurements show room temperature ferromagnetism in samples with lower Mn doping which is however, gets destroyed at higher Mn doping concentration. The results of the magnetic measurements have been explained using the local structure information obtained from EXAFS and XANES measurements.

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“…41,42 Photon energy range of the beamline is 4-25 keV. Beamline optics consists of a Rh/Pt coated collimating meridional cylindrical mirror used for collimation of beam.…”

Section: Methodsmentioning

confidence: 99%

Effect of ionic size compensation by Ag⁺ incorporation in homogeneous Fe-substituted ZnO: studies on structural, mechanical, optical, and magnetic properties

et al. 2018

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Substituting an ion of different size from that of the host element introduces lattice strain and defects.However, this mismatch may be significantly reduced by substituting an additional ion with a compensating size relative to the dopant. Such a double substitution might offer better solubility irrespective of the local distortions as well as the formation of defects in the valence states. Fesubstituted ZnO has been widely reported with conflicting results primarily arising from lack of chemical and structural homogeneity originating from preparation techniques, compositional fluctuations, and equivocal comprehension of actual solubility limits of the dopants. In this study, Ag ion has been incorporated in Fe-substituted ZnO to compensate the ionic size of Zn 1Àx [Fe 0.8

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A comprehensive facility for EXAFS measurements at the INDUS-2 synchrotron source at RRCAT, Indore, India

Cited by 150 publications

References 7 publications

Size-Induced Structural Phase Transition at ∼6.0 nm from Mixed fcc–hcp to Purely fcc Structure in Monodispersed Nickel Nanoparticles

Size-Induced Structural Phase Transition at ∼6.0 nm from Mixed fcc–hcp to Purely fcc Structure in Monodispersed Nickel Nanoparticles

X-ray absorption spectroscopy of Mn doped ZnO thin films prepared by rf sputtering technique

Effect of ionic size compensation by Ag⁺ incorporation in homogeneous Fe-substituted ZnO: studies on structural, mechanical, optical, and magnetic properties

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A comprehensive facility for EXAFS measurements at the INDUS-2 synchrotron source at RRCAT, Indore, India

Cited by 150 publications

References 7 publications

Size-Induced Structural Phase Transition at ∼6.0 nm from Mixed fcc–hcp to Purely fcc Structure in Monodispersed Nickel Nanoparticles

Size-Induced Structural Phase Transition at ∼6.0 nm from Mixed fcc–hcp to Purely fcc Structure in Monodispersed Nickel Nanoparticles

X-ray absorption spectroscopy of Mn doped ZnO thin films prepared by rf sputtering technique

Effect of ionic size compensation by Ag+ incorporation in homogeneous Fe-substituted ZnO: studies on structural, mechanical, optical, and magnetic properties

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Product

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Effect of ionic size compensation by Ag⁺ incorporation in homogeneous Fe-substituted ZnO: studies on structural, mechanical, optical, and magnetic properties