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Browsing Faculty of Science and Technology by Author "Narlikar, A. V."

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Afm, stm and sts studies of grain boundaries And ion-beam induced defects in MGB2

Narayan, Himanshu; Narlikar, A. V.; Herrmann, P. S. P.; Samanta, S. B.; Gupta, Anurag; Kanjilal, D.; Muranaka, T.; Akimitsu, J.; Vijayaraghavan, R. (Nova Science Publishers, 2001-06)
Er1−yCayBa2Cu3−x(Fe, Zn)xO7−δ superconductors: a study of microstructure and resistive transitions in a dc magnetic field

Chaudhuri, Sukalpa; Gupta, Anurag; Ganesan, V.; Das, I.; Kumar, Anil; Zaleski, A. J; Narayan, Himanshu; Narlikar, A. V. (IOP Publishing Ltd, 2001-10-15)

We report an investigation of structure by x-ray diffraction, microstructure by atomic force microscopy (AFM) and broadening of resistive transitions in high dc magnetic fields (0–20 kOe) in Er1−yCayBa2Cu3−x(Fe, Zn)xO7−δ (y ...
Grain boundaries as weak links: The case of MgB2 with reference to YNi2B2C

Samanta, S. B.; Narayan, Himanshu; Gupta, Anurag; Narlikar, A. V.; Muranaka, T.; Akimitsu, J. (The American Physical Society, 2002-02-20)

The grain boundaries ~GB’s! in the intermetallic superconductor MgB2 , interestingly, do not show suppression of supercurrent density. This unexpected behavior has been investigated by a scanning tunneling microscopy/s ...
A possible correlation between suppression of superconductivity, magnetic ordering and normal state resistivity parameters in the Yb1−xprxba2cu3o7−_ system

Gupta, Anurag; Narayan, Himanshu; Lisboa-Filho, P. N.; Cardoso, C. A.; Moreira, Fernando M. Araujo; De Lima, O. F.; Narlikar, A. V. (World Scienti fic Publishing Company, 2002)

Polycrystalline samples of the Pr doped Yb1−xPrxBa2Cu3O7− (i.e. Yb(Pr)-123) system for 0 x 1 have been investigated for resistivity and magnetization M as a function of temperature in normal and superconducting ...
An SEM and STM investigation of surface smoothing in 130 MeV Si-irradiated metglass MG2705M

Narayan, Himanshu; Samanta, S. B.; Agrawal, H. M.; Kushwaha, R. P. S.; Kanjilal, D.; Sharma, S. K.; Narlikar, A. V. (IOP Publishing Ltd, 1999)

Metglass MG2705M foils of about 17 m thickness were irradiated at 90 K by 130 MeV 28Si ions, up to a fluence of 1:154 1016 ions cm−2. The surface modifications induced by irradiation have been examined by scanning ...
SEM, STM/STS and heavy ion irradiation studies on magnesium diboride superconductor

Narayan, Himanshu; Samanta, S. B.; Gupta, Anurag; Narlikar, A. V.; Kishore, R.; Sood, K. N.; Kanjilal, D.; Muranaka, T.; Akimitsu, J. (Elsevier Ltd., 2002)

We have presented here the results of SEM and STM/STS investigations carried out on MgB2 superconductor. The SEM pictures show porous surface and well-linked granular structure in which bigger grains (few micrometer size) ...
Study of magnetization and pinning mechanisms in MgB2 thin film superconductors: effect of heavy ion irradiation

Narayan, Himanshu; Gupta, Anurag; Astill, D.; Kanjilal, D.; Ferdeghini, C.; Paranthaman, M.; Narlikar, A. V. (IOP Publishing Ltd, 2003)

We report magnetization studies on MgB2 superconducting thin films in a temperature range 4.2–40 K and magnetic field range 0–6 T. Thin films prepared by both pulsed laser deposition (PLD) and electron beam evaporation ...
Study of microstructural changes in MgB2 thin film superconductors irradiated with 200 MeV 107Ag ions

Narayan, Himanshu; Gupta, Anurag; Narlikar, A. V.; Sood, K. N.; Kishore, R. (IOP Publishing Ltd, 2004-06-18)

MgB2 superconductor thin films, prepared by pulsed laser deposition (PLD) and electron beam evaporation (EBE), have been investigated by scanning electron microscopy (SEM) before and after 200 MeV 107Ag ion irradiation. ...

Browsing Faculty of Science and Technology by Author "Narlikar, A. V."

Browsing Faculty of Science and Technology by Author "Narlikar, A. V."

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