Physical and magnetic characterization of co-precipitated nanosize Co–Ni ferrites

Gul, Iftikhar Hussain; Amin, F.; Abbasi, Ali; Anis-ur-Rehman, M.; Maqsood, Asghari

doi:10.1016/j.scriptamat.2006.11.020

Cited by 122 publications

(55 citation statements)

References 20 publications

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“…6). Spinel ferrites have been previously doped with Ca 2þ , 25 Zn 2þ , 26 Zr-Mn, 27 Co-Ni, 28 and ZrNi, 29 and their room temperature resistivity is found to be in the range of 10 6 -10 7 X cm which is $100 times less than that achieved in this study. So, Co-Cr doped materials can be suitable to curb the eddy current losses for microwave applications.…”

Section: Electrical Propertiescontrasting

confidence: 67%

Physical, electrical and magnetic properties of nano-sized Co-Cr substituted magnesium ferrites

Iqbal

Ahmad

Meydan

et al. 2012

Journal of Applied Physics

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Effects of alignment, pH, surfactant, and solvent on heat transfer nanofluids containing Fe2O3 and CuO nanoparticles J. Appl. Phys. 111, 064308 (2012) Size effect on the structural, magnetic, and magnetotransport properties of electron doped manganite La0.15Ca0. Curie temperature for this series is found to be in the range of 618-766 K. Room temperature resistivity increases gradually from 7.5 Â 10 8 X cm (x ¼ 0.0) to 3.47 Â 10 9 X cm (x ¼ 0.5). Additionally, dielectric measurements are carried out at room temperature in a frequency range of 100 Hz to 3 MHz. With improvement in the values of the above-mentioned properties, the synthesized materials could be suitable for potential application in some magnetic and microwave devices.

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Section: Electrical Propertiescontrasting

confidence: 67%

Physical, electrical and magnetic properties of nano-sized Co-Cr substituted magnesium ferrites

Iqbal

Ahmad

Meydan

et al. 2012

Journal of Applied Physics

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“…The particle size was calculated by considering in all detectable peaks the half peak width at maximum and the average particle size was found in the range of 16-26 nm as listed in Table 1, whereas the lattice constant (a), cell volume (a 3 ), X-ray density and measure density were calculated using formulae in Refs. [2,19]. It is observed that with increase in concentration of Zr 4+ and Ni 2+ the lattice constant values increase.…”

Section: Structural Studiesmentioning

confidence: 93%

Effect of Concentration of Zr4+ and Ni2+ Dopants on Electrical, Magnetic and Y–K Angle of Mg–Cu Complex Spinel Nanoferrites

Faraz

2011

J Supercond Nov Magn

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The complex Mg-Cu nanoferrites with composition Mg 0.5 Cu 0.5 Fe 2−2x Ni x Zr x O 4 (0.00 ≤ x ≤ 0.80) were synthesized by incorporating dopants Zr 4+ and Ni 2+ with the help of chemical co-precipitation method. The synthesized samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR), dc electrical and magnetic properties through laboratory-made two-probe resistivity apparatus and vibrating sample magnetometer (VSM). XRD confirmed the formation of single phase spinel nanoferrites having crystalline size in range 16-29 nm. The particle size (t) and lattice parameter (a) increase with the increase in concentration of dopants. The XRD results are in good agreement with SEM results. FTIR give valuable information about the presence of tetrahedral (A) and octahedral (B) sites by considering higher and lower frequency bands, respectively. The electrical properties, e.g. dc electrical resistivity (ρ d ), drift mobility (μ d ) and activation energy (E), were calculated. Resistivity data confirm semiconducting behavior of material. And it is observed that an abrupt increase in resistivity occurs up to x = 0.40. While further increase in dopants concentration leads to decrease in resistivity. Magnetic hysteresis loops confirmed soft nature of synthesized material. Interesting magnetic behavior is observed that up to x = 0.40 the value of saturation magnetization (M s ), remanence (M r ) and Bohr magneton (n B ) increase and after that decrease in trend occurs. For x = 0.40, minimum coercive force (H c ) is observed. Y-K angle increases with increase in dopant concentration. So it is confirmed that A. Faraz ( ) Thermal Transport Laboratory (TTL), School of chemical and materials Engineering (the incorporation of dopant in small amount (x ≤ 0.40) enhances magnetic properties and further increase of Zr 4+ can weaken magnetic properties.

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“…My contribution to the development of nano-physics in Pakistan has been significant not only because of my own research but also due to training other research scientists from various national and international institutes. My research laboratory has produced internationally recognized research, as evidenced by numerous leading archives of internationally reputable journals, presentations in national and international conferences and their respective proceedings [3][4][5][6].…”

Section: Research and Publicationsmentioning

confidence: 99%

My journey in physics

Maqsood

2017

Can. J. Phys.

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I am Professor Asghari Maqsood, Ph.D., one of the leading women physicists of Pakistan. In Pakistan a very small fraction of physicists are women and I have worked very hard to be recognized in a field dominated by men. I have been associated with the field of research and teaching in physics for the last 43 years. My field of specialization is materials science and solid state physics. This is my journey from a school girl in Abbottabad to becoming a leader and mentor in physics in Pakistan.Key words: leading woman, physics, leader.Résumé : Je suis la professeure Dr Asghari Maqsood, une femme physicienne de premier plan au Pakistan. Au Pakistan, une très petite fraction des physiciens sont des femmes et j'ai travaillé très dur pour être reconnue dans un champ dominé par les hommes. Je fais de la recherche et de l'enseignement en physique depuis quarante trois ans. Mon champ de spécialisation est la science des matériaux et la physique de l'état solide. Ceci est mon histoire, commençant avec la petite fille à Abbottabad pour devenir une leader et une mentor en physique au Pakistan. [Traduit par la Rédaction]Mots-clés : femme de premier plan, physique, leader.

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Physical and magnetic characterization of co-precipitated nanosize Co–Ni ferrites

Cited by 122 publications

References 20 publications

Physical, electrical and magnetic properties of nano-sized Co-Cr substituted magnesium ferrites

Physical, electrical and magnetic properties of nano-sized Co-Cr substituted magnesium ferrites

Effect of Concentration of Zr4+ and Ni2+ Dopants on Electrical, Magnetic and Y–K Angle of Mg–Cu Complex Spinel Nanoferrites

My journey in physics

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