T N Sairam
Articles written in Bulletin of Materials Science
Volume 20 Issue 4 July 1997 pp 535-540
57Fe Mössbauer and positron lifetime studies of Al-Cu-Fe quasicrystals
C M Chittaranjan T N Sairam K P Gopinathan C S Sundar
Al61·4Cu22·7Fe15·9, Al63·2Cu21·8Fe15 and Al71Cu14Fe15 have been studied by Mössbauer, positron annihilation and X-ray diffraction techniques. The positron lifetime, measured as a function of temperature, in Al61·4Cu22·7Fe15·9 shows a two-step increase. This is found to be due to the dynamics of phasons associated with Al and Cu, having activation energies of 0·43 eV and 0·78 eV respectively. In the case of Al71Cu14Fe15, a phase transformation from the quasicrystalline-crystalline phase at ≈ 550°C is observed.
Volume 22 Issue 4 June 1999 pp 751-755 Oxide Materials
Mössbauer and XRD studies on the effect of doping iron in KCaY(PO4)2
T N Sairam G V Narasimha Rao B Viswanathan
The effect of doping iron at the yttrium site in hexagonal KCaY(PO4)2 is studied for various concentrations of
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Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
Chemical Sciences 2020
Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
Physical Sciences 2020
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