Superconducting gap structure and pinning in disordered MgB2 films (2004)
Bugoslavsky, Y., Miyoshi, Y., Perkins, G. K., Caplin, A. D., Cohen, L. F., Zhai, H. Y., ...
We have performed a comparative study of two thin films of magnesium diboride (MgB2) grown by different techniques. The critical current density at different temperatures and magnetic fields was...
Superconducting gap structure and pinning in disordered MgB2 films (2003)
Bugoslavsky, Y., Miyoshi, Y., Perkins, G. K., Caplin, A. D., Cohen, L. F., Zhai, H. Y., ...
We have performed a comparative study of two thin films of magnesium diboride (MgB2) grown by different techniques. The critical current density at different temperatures and magnetic fields was...
Christen, H. M., Rouleau, C. M., Ohkubo, I., Zhai, H. Y., Lee, H. N., Sathyamurthy, S., ...
A new method for continuous compositional-spread (CCS) thin-film fabrication based on pulsed-laser deposition (PLD) is introduced. This approach is based on a translation of the substrate heater and...
Effective Vortex Pinning in MgB2 thin films (2002)
Bugoslavsky, Y., Cowey, L., Tate, T. J., Perkins, G. K., Moore, J., Lockman, Z., ...
We discuss pinning properties of MgB2 thin films grown by pulsed-laser deposition (PLD) and by electron-beam (EB) evaporation. Two mechanisms are identified that contribute most effectively to the...
The structure of the superconducting gap in MgB2 from point-contact spectroscopy (2001)
Bugoslavsky, Y., Miyoshi, Y., Perkins, G. K., Berenov, A. V., Lockman, Z., MacManus-Driscoll, J. L., ...
We have studied the structure of the superconducting gap in MgB2 thin films by means of point-contact spectroscopy using a gold tip. The films were produced by depositing pure boron on a sapphire...
Zhukov, A. A., Purnell, A., Miyoshi, Y., Bugoslavsky, Y., Lockman, Z., Berenov, A., ...
The microwave power, dc magnetic field, frequency and temperature dependence of the surface resistance of MgB2 films and powder samples were studied. Sample quality is relatively easy to identify by...
Zhukov, A. A., Cohen, L. F., Purnell, A., Bugoslavsky, Y., Berenov, A., MacManus-Driscoll, J. L., ...
In this paper we present the results of measurements of the microwave surface impedance of a powder sample and two films of MgB$_2$. One film has $T_c=30$ K and is not textured, the other is...
Unusual Hall Effect in Superconducting MgB$_2$ Films: Analogy to High-T$_c$ Cuprates (2001)
Jin, R., Paranthaman, M., Zhai, H. Y., Christen, H. M., Christen, D. K., Mandrus, D.
We have investigated the temperature and magnetic field dependence of the Hall coefficient of two well-characterized superconducting MgB$_2$ films (T$_{c0}$=38.0 K) in both the normal and...
Degradation of superconducting properties in MgB2 films by exposure to water (2001)
Zhai, H Y, Christen, H M, Zhang, L, Paranthaman, M, Fleming, P H, Lowndes, D H
The effect of water exposure on MgB2 is studied by submerging an 800 nm thick MgB2 film into deionized water at room temperature for 1 hour, 4 hours, 10 hours, and 15 hours, and by analyzing the...
Growth mechanism of superconducting MgB2 films prepared by various methods (2001)
Zhai, H. Y., Christen, H. M., Zhang, L., Paranthaman, M., Cantoni, C., Sales, B. C., ...
The growth mechanisms of MgB2 films obtained by different methods on various substrates are compared via a detailed cross-sectional scanning electron microscopy (SEM) study. The analyzed films...
Zhai, H. Y., Christen, H. M., Zhang, L., Cantoni, C., Paranthaman, M., Sales, B. C., ...
Superconducting magnesium diboride films with Tc0 ~ 24 K and sharp transition \~ 1 K were successfully prepared on silicon substrates by pulsed laser deposition from a stoichiometric MgB2 target....
Superconducting MgB(2) films via precursor post-processing approach (2001)
Paranthaman, M., Cantoni, C., Zhai, H. Y., Christen, H. M., Aytug, T., Sathyamurthy, S., ...
Superconducting MgB(2) films with Tc = 38.6 K were prepared using a precursor-deposition, ex-situ post-processing approach. Precursor films of boron, ~0.5 micrometer thick, were deposited onto...
Christen, H. M., Zhai, H. Y., Cantoni, C., Paranthaman, M., Sales, B. C., Rouleau, C., ...
Thin superconducting films of magnesium diboride (MgB2) with Tc \approx 24K were prepared on various oxide substrates by pulsed laser deposition (PLD) followed by an in-situ anneal. A systematic...