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Dive into the research topics where M. Abdullah Dar is active.

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Featured researches published by M. Abdullah Dar.


Integrated Ferroelectrics | 2010

Magnetic and Electrical Properties of Ti Substituted Lithium Zinc Ferrites

M. Abdullah Dar; Vivek Verma; Vibhav Pandey; Ravi Sonkar; W. A. Siddiqui; R.K. Kotnala

The effect of Ti on the magnetic, power loss and structural properties of Li0.35+x/2Zn0.3Mn0.05TixFe2.30–1.5xO4 ferrites (x = 0.0 to 0.25 in step of 0.05) + 0.5 wt% Bi2O3, prepared by standard ceramic technique, has been investigated. Phase formation of all samples has been confirmed by XRD. The magnetic properties have been measured by VSM. A continuous decrease is found in saturation magnetization with Ti concentration in Li0.35+x/2Zn0.3Mn0.05TixFe2.30–1.5xO4 ferrites. Complex permeability (μ* = μ′−jμ″) have been analysed at room temperature in frequency range from 1 MHz to 103 MHz. It was found an enhancement in permeability with Ti concentration in Li0.35+x/2Zn0.3Mn0.05TixFe2.30–1.5xO4 and exhibits the maximum value of 160 for x = 0.05 sample. Power loss measurements have been carried out in induction field B = 10 mT in frequency range of 50 KHz to 3 MHz. Power loss has been found to be quite low with the substitution of Ti in lithium zinc ferrite.


Journal of Alloys and Compounds | 2010

Synthesis and characterization of nano-sized pure and Al-doped lithium ferrite having high value of dielectric constant

M. Abdullah Dar; Khalid Mujasam Batoo; Vivek Verma; Weqar Ahmad Siddiqui; R.K. Kotnala


Synthetic Metals | 2010

Enhanced microwave absorption properties in polyaniline and nano-ferrite composite in X-band

S.P. Gairola; Vivek Verma; Lalit Kumar; M. Abdullah Dar; S. Annapoorni; R.K. Kotnala


Applied Surface Science | 2012

Low dielectric loss of Mg doped Ni–Cu–Zn nano-ferrites for power applications

M. Abdullah Dar; Vivek Verma; S.P. Gairola; Weqar Ahmad Siddiqui; Rakesh Kumar Singh; R.K. Kotnala


Journal of Physical Chemistry C | 2012

High Magneto-Crystalline Anisotropic Core–Shell Structured Mn0.5Zn0.5Fe2O4/Polyaniline Nanocomposites Prepared by in Situ Emulsion Polymerization

M. Abdullah Dar; R. K. Kotnala; Vivek Verma; Jyoti Shah; Weqar Ahmad Siddiqui; Masood Alam


Journal of Magnetism and Magnetic Materials | 2010

Minimizing of power loss in Li–Cd ferrite by nickel substitution for power applications

R.K. Kotnala; M. Abdullah Dar; Vivek Verma; A.P. Singh; Weqar Ahmad Siddiqui


Applied Nanoscience | 2014

Study of structure and magnetic properties of Ni-Zn ferrite nano-particles synthesized via co-precipitation and reverse micro-emulsion technique

M. Abdullah Dar; Jyoti Shah; Weqar Ahmad Siddiqui; R.K. Kotnala


Journal of Alloys and Compounds | 2012

Influence of synthesis approach on structural and magnetic properties of lithium ferrite nanoparticles

M. Abdullah Dar; Jyoti Shah; Weqar Ahmad Siddiqui; R.K. Kotnala


Materials Chemistry and Physics | 2010

Magnetic properties of nano-crystalline Li0.35Cd0.3Fe2.35O4 ferrite prepared by modified citrate precursor method

Vivek Verma; M. Abdullah Dar; Vibhav Pandey; Anterpreet Singh; S. Annapoorni; R.K. Kotnala


Journal of Sol-Gel Science and Technology | 2012

Study of dielectric and ac impedance properties of citrate-gel synthesized Li0.35Zn0.3Fe2.35O4 ferrite

R.K. Kotnala; Rekha Gupta; Jyoti Shah; M. Abdullah Dar

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R.K. Kotnala

National Physical Laboratory

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Jyoti Shah

National Physical Laboratory

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S.P. Gairola

National Physical Laboratory

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Vibhav Pandey

National Physical Laboratory

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A.P. Singh

National Physical Laboratory

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Lalit Kumar

All India Institute of Medical Sciences

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R. K. Kotnala

Council of Scientific and Industrial Research

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Rakesh Kumar Singh

National Physical Laboratory

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