X-Ray Photoelectron Study of the Formation of the Chemical Bond and the Atomic Magnetic Moment in Nickel-Carbon Nanocomposites Modified by d-Metal Oxides

The electronic structure of amorphous and crystalline Fe100–xBx alloys for 14≤x≤19.5 has been studied by x-ray photoelectron spectroscopy and calculated in terms of the modified coherent potential approximation. Exchange splitting measurements of 3s-spectra were used to estimate the atomic magnetic moment of the Fe atom in Fe-B amorphous and crystalline alloys. These results agree qualitatively with saturation magnetization measurements including the deviation from the Slater-Pauling curve. This deviation according to our calculations is the result of the specific charge transfer of s, p and d electrons at about 15.5 at % B. The calculation in ternary alloy approach shows a stable ferromagnetic state of Fe atoms for the studied alloy concentrations.

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Atomic magnetic moment and X-ray photoelectron spectra of Fe-based crystalline and amorphous alloys

Journal of Non-Crystalline Solids ◽

10.1016/0022-3093(95)00635-4 ◽

1996 ◽

Vol 197 (2-3) ◽

pp. 205-209 ◽

Cited By ~ 2

Author(s):

I.G. Batirev ◽

J.A. Leiro ◽

M.H. Heinonen

Keyword(s):

Magnetic Moment ◽

Amorphous Alloys ◽

Photoelectron Spectra ◽

Atomic Magnetic Moment ◽

X Ray

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Atomic magnetic moment and electronic structure of Fe-B amorphous alloys based on x-ray photoelectron spectroscopy

Solid State Communications ◽

10.1016/0038-1098(94)90845-1 ◽

1994 ◽

Vol 91 (1) ◽

pp. 71-73

Author(s):

I.G. Batirev ◽

J.A. Leiro ◽

M. Heinonen

Keyword(s):

Electronic Structure ◽

Magnetic Moment ◽

Photoelectron Spectroscopy ◽

Amorphous Alloys ◽

Atomic Magnetic Moment ◽

X Ray

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Acalypha Indica mediated MgO NPs: A novel approach in greener route with its antibacterial activity against pathogens

Nanoscale Reports ◽

10.26524/nr.3.12 ◽

2020 ◽

Vol 3 (2) ◽

Author(s):

Kavipriya K C ◽

Sudha A P ◽

Sujatha K ◽

Sowmya Lakshmi K

Keyword(s):

Antibacterial Activity ◽

Metal Oxides ◽

Bacterial Species ◽

Magnesium Nitrate ◽

Precipitation Method ◽

Average Crystalline Size ◽

Face Centered Cubic ◽

X Ray ◽

Novel Approach ◽

Acalypha Indica

The interest in miniaturization of particles revealed the hidden applications of metal oxides. The potential applications of the particles may vary when the size of the particle is reduced. One of the alternative routes to the conventional approach is the use of plant extract for the synthesis of metal oxides NPs. In the framework of this study, the ecofriendly MgO nanoparticles were synthesized using Acalypha Indica leaf extract,functioning as reducing and capping agent by co-precipitation method. The predecessor taken here was Magnesium Nitrate. The biologically synthesized MgO NPs were characterized by various techniques like X ray diffraction(XRD), Fourier Transform infrared spectroscopy(FTIR), Scanning electron microscope (SEM) with Energy Dispersive X-ray spectroscopy(EDX) profile and its antibacterial activity is evaluated against causative organisms. XRD studies confirmed the face centered cubic crystalline structure of MgO NPs and the average crystalline size of MgO NPs calculated using Scherer’s formula was found to be 13 nm. FTIR spectrum shows a significant Mg-O vibrational band. Purity, surface morphology and chemical composition of elements were confirmed by SEM with EDX. The SEM result shows the fine spherical morphology with the grain size range between 43nm to 62nm. Antimicrobial assay of MgO NPs was examined against gram positive and negative bacteria. Appreciated activity was observed on the Staphylococcus aureus bacterial species. In general, the renewed attempt of this facile approach gave the optimum results of multifunctional MgO NPs.

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Ternary Antimonides RE4T7Sb6 (RE=Gd–Lu; T =Ru, Rh) with Cubic U4Re7Si6-type Structure

Zeitschrift für Naturforschung B ◽

10.5560/znb.2013-3181 ◽

2013 ◽

Vol 68 (9) ◽

pp. 971-978 ◽

Cited By ~ 2

Author(s):

Inga Schellenberg ◽

Ute Ch. Rodewald ◽

Christian Schwickert ◽

Matthias Eul ◽

Rainer Pöttgen

Keyword(s):

Magnetic Susceptibility ◽

Single Crystal ◽

Magnetic Moment ◽

Induction Furnace ◽

X Ray Diffraction ◽

Temperature Dependent ◽

X Ray ◽

Antiferromagnetic Ordering ◽

Arc Melting ◽

Intermediate Valent

The ternary antimonides RE4T7Sb6 (RE=Gd-Lu; T =Ru, Rh) have been synthesized from the elements by arc-melting and subsequent annealing in an induction furnace. The samples have been characterized by powder X-ray diffraction. Four structures were refined on the basis of single-crystal X-ray diffractometer data: U4Re7Si6 type, space group Im3m with a=862.9(2) pm, wR2=0.0296, 163 F2 values for Er4Ru7Sb6; a=864.1(1) pm, wR2=0.1423, 153 F2 values for Yb4Ru7Sb6; a=872.0(2) pm, wR2=0.0427, 172 F2 values for Tb4Rh7Sb6; and a=868.0(2) pm, wR2=0.0529, 154 F2 values for Er4Rh7Sb6, with 10 variables per refinement. The structures have T1@Sb6 octahedra and slightly distorted RE@T26Sb6 cuboctahedra as building units. The distorted cuboctahedra are condensed via all trapezoidal faces, and this network leaves octahedral voids for the T1 atoms. The ruthenium-based series of compounds was studied by temperature-dependent magnetic susceptibility measurements. Lu4Ru7Sb6 is Pauli-paramagnetic. The antimonides RE4Ru7Sb6 with RE=Dy, Ho, Er, and Tm show Curie-Weiss paramagnetism. Antiferromagnetic ordering occurs at 10.0(5), 5.1(5) and 4.0(5) K for Dy4Ru7Sb6, Ho4Ru7Sb6 and Er4Ru7Sb6, respectively, while Tm4Ru7Sb6 remains paramagnetic. Yb4Ru7Sb6 is an intermediate-valent compound with a reduced magnetic moment of 3.71(1) μB per Yb as compared to 4.54 μB for a free Yb3+ ion

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