A. Ahad

activity

20192022

most citedRole of the V-V dimerization in insulator-metal transition and optical transmittance of pure and doped VO2 thin films

42 citations · 117 across the 10 of their papers we have counts for

collaborators

10 papers

cond-mat.mtrl-sci2022★ 33 cited

Coexistence of local structural heterogeneities and long-range ferroelectricity in Pb-free (1-x)Ba(Zr0.2Ti0.8)O3-x(Ba0.7Ca0.3)TiO3 ceramics

Koushik Dey, Abdul Ahad, Kamini Gautam +11

Environmentally benign (1-x)Ba(Ti $_{0.8}$ Zr $_{0.2}$ )O $_{3}$ -x(Ba $_{0.7}$ Ca $_{0.3}$ )TiO $_{3}$ (BZT-BCT) ceramics are promising materials due to their remarkable high piezoresponse [Liu…

cond-mat.mtrl-sci2021★ 2 cited

Pressure-induced collapse of ferromagnetism in Nickel

A. Ahad, M. S. Bahramy

Transition metals, Fe, Co and Ni, are the canonical systems for studying the effect of external perturbations on ferromagnetism. Among these, Ni stands out as it undergoes no struc…

cond-mat.mtrl-sci2020★ 7 cited

Magnetic correlations in subsystems of the misfit [Ca $_{2}$ CoO $_{3}$ ] $_{0.62}$ [CoO $_{2}$ ] cobaltate

Abdul Ahad, K. Gautam, K. Dey +7

[Ca $_{2}$ CoO $_{3}$ ] $_{0.62}$ [CoO $_{2}$ ], a two dimensional misfit metallic compound, is famous for its rich phases accessed by temperature, $i . e .$ high temperature spin-state transition,…

cond-mat.str-el2020★ 11 cited

Origin of the high Seebeck coefficient of the misfit [Ca $_{2}$ CoO $_{3}$ ] $_{0.62}$ [CoO $_{2}$ ] cobaltate from site-specific valency and spin-state determinations

Abdul Ahad, K. Gautam, S. S. Majid +4

Layered misfit cobaltate [Ca $_{2}$ CoO $_{3}$ ] $_{0.62}$ [CoO $_{2}$ ], which emerged as an important thermoelectric material~[A. C. Masset et al. Phys. Rev. B, 62, 166 (2000)], has been explo…

cond-mat.mtrl-sci2020★ 1 cited

Random magnetic anisotropy driven transitions in layered perovskite LaSrCoO $_{4}$

Abdul Ahad, K. Gautam, S. S. Majid +8

Attempts to unravel the nature of magnetic ordering in LaSrCoO $_{4}$ (Co $^{3 +}$ ), a compound intermediate between antiferromagnetic (AFM) La $_{2}$ CoO $_{4}$ (Co $^{2 +}$ ) and ferromagnetic…

cond-mat.str-el2019

Non thermal isostructural electrically driven insulator-metal transition and electro-strain in layered cobaltate

Abdul Ahad, R. Rawat, F. Rahman +1

We report here a discovery of electrically driven insulator to metal transition (IMT) and concomitant isostructural volume expansion in the layered cobaltates which otherwise do no…

cond-mat.mtrl-sci2019★ 4 cited

Magnetic and orbital correlations in multiferroic CaMn $_{7}$ O $_{12}$ probed by x-ray resonant elastic scattering

K. Gautam, S. S. Majid, S. Francoual +6

The quadruple perovskite CaMn $_{7}$ O $_{12}$ is a topical multiferroic, in which the hierarchy of electronic correlations driving structural distortions, modulated magnetism, and orbi…

cond-mat.mtrl-sci2019★ 42 cited

Role of the V-V dimerization in insulator-metal transition and optical transmittance of pure and doped VO2 thin films

S. S. Majid, S. R. Sahu, A. Ahad +7

Insulator to metal (IMT) transition (T $_{t}$ $\sim$ 341 K) in the VO2 accompanies transition from an infrared (IR) transparent to IR opaque phase. Tailoring of the IMT and associated…

cond-mat.str-el2019★ 1 cited

Mott-Hubbard insulator-metal transition in the VO2 thin film: A combined XAS and resonant PES study

S. S. Majid, K. Gautam, A. Ahad +4

We have analyzed spectral weight changes in the conduction and the valence band across insulator to metal transition (IMT) in the VO2 thin film using X-ray absorption spectroscopy…

physics.ins-det2019★ 16 cited

A setup for Seebeck coefficient measurement through controlled heat pulses

Abdul Ahad, D. K. Shukla

A setup is designed for measuring the Seebeck coefficient (S) of materials in form of thin film, bar and wire. The main feature of this setup is control in heating and cooling cycl…