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Article
Magnetic phase transitions in Fe80-xNixCr20 (14 ⩽ x ⩽ 30) alloy studied by using 57Fe Mössbauer spectroscopy
This paper reports 57Fe Mössbauer spectroscopic studies of the polycrystalline samples of the substitutionally disordered, isostructural (fcc), ternary alloy system Fe80-xNixCr20 for x = 30, 26, 19 and 14 in the ...
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Article
Effect of Annealing on the Hyperfine Field Distributions in Fe79B16Si5 and Fe78B13Si9 Metallic Glasses
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Article
Mossbauer spectroscopic study of heat-treated and control-cooled Fe3Al alloys
The Fe–Al system forms a model object of transition metal-sp element system. Fe–Al alloys containing 21–31 at% Al are known to exhibit several attractive physical properties which render them candidate materia...
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Article
Positron annihilation lifetime study of hydrogen-charged Al-Al2O3 composites
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Article
Phase-precipitation studies of Fe-B-Si metallic glasses using Mössbauer spectroscopy
Phase-precipitation studies have been performed on samples of the metallic glasses Fe79B16Si5 and Fe78B13Si9, heated in the range 300–475 °C for various times (1–16 h) using 57Fe Mössbauer transmission spectrosco...
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Article
Mössbauer spectroscopic studies of the crystallization of amorphous Fe80B20−xSix (x=0, 2, and 8) alloys
The crystallization process of amorphous Fe80B20−xSix (x=0, 2, and 8) ferromagnetic alloys has been studied by using 57Fe Mössbauer spectroscopy and X-ray diffraction studies. Results for samples heat treated at ...
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Article
Mössbauer spectroscopic studies of glass ceramics with hexagonal barium and strontium ferrites
Mössbauer spectroscopic studies have been performed on glass ceramics in which barium and strontium hexaferrites have been crystallized as a major magnetic phase. The crystallization process of the different m...
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Chapter and Conference Paper
Positron studies of fermi surfaces in metals
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Article
Mössbauer spectroscopic studies of Y3−x Gd x Fe5O12(x =0, 0.5 and 3.0) prepared by an amorphous citrate process
The system Y3-x Gd x Fe5O12(x = 0, 0.5 and 3.0) synthesized through an amorphous citrate gel process has been investigated by Mössbauer and EPR spectroscopy. These studies deline...
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Article
Mössbauer studies of the effect of nucleating agents on the crystallization of YIG in the Na2O-SiO2-Y2O3-Fe3O3 glass system
The effect of 2 mol % of P2O5 or TiO2 on the crystallization of yttrium-iron-garnet (YIG) in Na2O-SiO2-Y2O3-Fe2O3 glass ceramics has been investigated by X-ray and Mössbauer spectroscopic studies. These studies i...
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Article
Study of Na2O-SiO2-Fe2O2-Y2O3 glass by Mössbauer and EPR spectroscopy
Mössbauer, EPR and magnetization experiments have been carried out on the glass composition Na2O-SiO2-Fe2O2-Y2O3 in which yttrium iron garnet (YIG) can be precipitated by suitable heat-treatment. The measurements...
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Article
Effect of bcc-fcc phase transition on the compton profiles of iron
The effect of theα-γ or bcc-fcc phase transition on the electron momentum distribution and Compton profiles of iron has been theoretically examined by a band structure calculation in the two phases. The calculate...
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Article
Momentum and spin density in magnetite
Measurements are reported of the angular correlation of annihilation radiation from polarized positrons in single crystals of Fe3O4. No change has been found in the angular correlations on passing through the met...
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Article
Positron angular correlation in copper
The two photon pair momentum density and the angular correlation curves for positron annihilation radiation from copper have been obtained by a band structure calculation, employing Hubbard’s approximation sch...
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Chapter
Positron Annihilation in Solids
Positron is the antipartie le of electron and its existence was predicted “by Dirac’s relativistic theory of electron. Positrons were experimentally discovered “by Anderson in cloud chamber photographs of cosm...
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Article
On the decay of129Cs
The radiations from the decay of129Cs have been investigated by β-ray spectrometer and coincidence scintillation spetrometer. New γ-rays of 790 and 920 keV have been detected. The conversion coefficients of the γ...
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Article
On the decay of xenon 133
The γ-rays from133Xe have been studied in a scintillation spectrometer. The γ-rays have the energy of 80 keV, 160 keV, 300 keV and 380 keV with the relative intensity 1, 1.4 · 10−2, 8.4 · 10−4 and 4.3 · 10−4. By ...