Yeoh, W. K., Horvat, J., Kim, J. H., Xu, X., Dou, S. X.
We have fabricated the multiwalled carbon nanotube (MWCNT) and nano-C doped MgB2 bulk and wire to investigate the effect of carbon substitution in theMgB2. Carbon substitution into boron site was...
Yeoh, W. K., Horvat, J., Kim, J. H., Xu, X., Dou, S. X.
Correlation of upper critical field (Hc2) and critical current density (Jc) with processing temperature of nano-C doped MgB2 has been studied in comparison to SiC and pure MgB2. SiC and C doped MgB2...
Yeoh, W. K., Horvat, J., Kim, J. H., Xu, X., Dou, S. X.
We have fabricated the multiwalled carbon nanotube (MWCNT) and nano-C doped MgB2 bulk and wire to investigate the effect of carbon substitution in theMgB2. Carbon substitution into boron site was...
Yeoh, W. K., Horvat, J., Kim, J. H., Xu, X., Dou, S. X.
Correlation of upper critical field (Hc2) and critical current density (Jc) with processing temperature of nano-C doped MgB2 has been studied in comparison to SiC and pure MgB2. SiC and C doped MgB2...
An alternative method for determination of the lock-in angle in twinned superconductors (2006)
Keshavarzi, S., Horvat, J., Pan, A. V., Qin, M. J., Dou, S. X., Yao, X., ...
An alternative method for determining the lock-in angle phiL for pinning of the vortices on extended defects has been developed. This method does not require any preassumed criterion for defining...
An alternative method for determination of the lock-in angle in twinned superconductors (2006)
Keshavarzi, S., Horvat, J., Pan, A. V., Qin, M. J., Dou, S. X., Yao, X., ...
An alternative method for determining the lock-in angle phiL for pinning of the vortices on extended defects has been developed. This method does not require any preassumed criterion for defining...
Magnetic field processing to enhance critical current densities of MgB2 superconductors (2006)
Dou, S. X., Yeoh, W. K., Shcherbakova, O., Horvat, J., Qin, M. J., Li, Y., ...
Magnetic field of up to 12 T was applied during the sintering process of pure MgB2 and carbon nanotube (CNT) doped MgB2 wires. We have demonstrated that magnetic field processing results in grain...
An alternative method for determination of the lock-in angle in twinned superconductors (2006)
Keshavarzi, S., Horvat, J., Pan, A. V., Qin, M. J., Dou, S. X., Yao, X., ...
An alternative method for determining the lock-in angle phiL for pinning of the vortices on extended defects has been developed. This method does not require any preassumed criterion for defining...
Chen, S. K., Tan, K. S., Glowacki, B. A., Yeoh, W. K., Soltanian, S., Horvat, J., ...
The influence of heating rates and annealing temperatures on the transition temperatures (Tc) and critical current densities (Jc) of pure MgB2, carbon nanotube- and nano-SiC-doped in situ...
Chen, S. K., Tan, K. S., Glowacki, B. A., Yeoh, W. K., Soltanian, S., Horvat, J., ...
The influence of heating rates and annealing temperatures on the transition temperatures (Tc) and critical current densities (Jc) of pure MgB2, carbon nanotube- and nano-SiC-doped in situ...
Horvat, J., Yeoh, W. K., Miller, L. M.
Interaction between the superconductor and ferromagnet in MgB2/Fe wires results in either a plateau or a peak effect in the field dependence of transport critical current, Ic(H). This is in addition...
Horvat, J., Yeoh, W. K., Miller, L. M.
Interaction between the superconductor and ferromagnet in MgB2/Fe wires results in either a plateau or a peak effect in the field dependence of transport critical current, Ic(H). This is in addition...
Horvat, J., Yeoh, W. K., Miller, L. M.
Interaction between the superconductor and ferromagnet in MgB2/Fe wires results in either a plateau or a peak effect in the field dependence of transport critical current, Ic(H). This is in addition...
Zhao, Y., Ionescu, M., Roussel, M., Pan, A. V., Horvat, J., Dou, S. X.
Significant differences in superconducting and microstructural properties between two types of MgB2 films prepared by pulsed laser deposition were determined. A very high Hc2 T slope of 1.1 T/K was...
Effect of carbon nanotube size on superconductivity properties of MgB/sub 2/ (2005)
Yeoh, W. K., Horvat, J., Dou, S. X., Munroe, P.
Experimental results are presented for the incorporation of carbon nanotube in polycrystalline MgB/sub 2/ superconductor based on X-ray diffraction and transmission electron microscopy measurements....
Zhao, Yue, Ionescu, M., Roussel, M., Pan, A. V., Horvat, J., Dou, S. X.
Significant differences in superconducting and microstructural properties between two types of MgB2 films prepared by pulsed laser deposition were determined. A very high Hc2 T slope of 1.1 T/K was...
Effect of carbon nanotube size on superconductivity properties of MgB/sub 2/ (2005)
Yeoh, W. K., Horvat, J., Dou, S. X., Munroe, P.
Experimental results are presented for the incorporation of carbon nanotube in polycrystalline MgB/sub 2/ superconductor based on X-ray diffraction and transmission electron microscopy measurements....
Horvat, J., Soltanian, S., Yeoh, W. K.
Ferromagnetic sheath around a superconducting wire results in an unusual transport Jc(H). For the field perpendicular to the current, there is a plateau in Jc(H) at high temperatures and intermediate...
Horvat, J., Soltanian, S., Yeoh, W. K.
Ferromagnetic sheath around a superconducting wire results in an unusual transport Jc(H). For the field perpendicular to the current, there is a plateau in Jc(H) at high temperatures and intermediate...
Chen, S. K., Tan, K. S., Glowacki, B. A., Yeoh, W. K., Soltanian, S., Horvat, J., ...
The influence of heating rates and annealing temperatures on the transition temperatures (Tc) and critical current densities (Jc) of pure MgB2, carbon nanotube- and nano-SiC-doped in situ...
Horvat, J., Yeoh, W. K., Miller, L. M.
Interaction between the superconductor and ferromagnet in MgB2/Fe wires results in either a plateau or a peak effect in the field dependence of transport critical current, Ic(H). This is in addition...
Zhao, Y., Ionescu, M., Roussel, M., Pan, A. V., Horvat, J., Dou, S. X.
Significant differences in superconducting and microstructural properties between two types of MgB2 films prepared by pulsed laser deposition were determined. A very high Hc2 T slope of 1.1 T/K was...
Effect of carbon nanotube size on superconductivity properties of MgB/sub 2/ (2005)
Yeoh, W. K., Horvat, J., Dou, S. X., Munroe, P.
Experimental results are presented for the incorporation of carbon nanotube in polycrystalline MgB/sub 2/ superconductor based on X-ray diffraction and transmission electron microscopy measurements....
Horvat, J., Soltanian, S., Yeoh, W. K.
Ferromagnetic sheath around a superconducting wire results in an unusual transport Jc(H). For the field perpendicular to the current, there is a plateau in Jc(H) at high temperatures and intermediate...
Superconducting screening on different length scales in high-quality bulk MgB2 superconductor (2004)
Horvat, J., Soltanian, S., Pan, A. V., Wang, X. L.
High-quality bulk MgB2 exhibits a structure of voids and agglomeration of crystals on different length-scales. Because of this, the superconducting currents percolate between the voids in the ensuing...
Superconducting screening on different length scales in high-quality bulk MgB2 superconductor (2004)
Horvat, J., Soltanian, S., Pan, A. V., Wang, X. L.
High-quality bulk MgB2 exhibits a structure of voids and agglomeration of crystals on different length-scales. Because of this, the superconducting currents percolate between the voids in the ensuing...
Effect of Nano Scale Fe Doping on Superconducting Properties of MgB2 (2004)
Dou, S. X., Soltanian, S., Zhao, Y., Getin, E., Chen, Z., Horvat, J.
Iron is an important sheath material for fabrication of MgB2 wires. However, the effect of Fe doping on the superconducting properties of MgB2 remains controversial. In this work, we present results...
James, M., Cassidy, D., Wilson, K. F., Horvat, J., Withers, R. L.
We have demonstrated that SrCoO3-d can be stabilised into phase pure perovskite forms by the introduction of small amounts ~5% of certain rare earth ions (Sm3+ - Yb3+). At the same doping levels,...
James, M., Cassidy, D., Wilson, K F, Horvat, J., Withers, R L
We have demonstrated that SrCoO3-d can be stabilised into phase pure perovskite forms by the introduction of small amounts ~5% of certain rare earth ions (Sm3+ - Yb3+). At the same doping levels,...
Effect of sample size on magnetic Jc for MgB2 superconductor (2004)
Horvat, J., Soltanian, S., Wang, X. L., Dou, S. X.
A strong effect of sample size on magnetic Jc(H) was observed for bulk MgB2 when Jc is obtained directly from the critical state model. Thus obtained zero-field Jc (Jc0) decreases strongly with the...
Effect of sample size on magnetic Jc for MgB2 superconductor (2004)
Horvat, J., Soltanian, S., Wang, X. L., Dou, S. X.
A strong effect of sample size on magnetic Jc(H) was observed for bulk MgB2 when Jc is obtained directly from the critical state model. Thus obtained zero-field Jc (Jc0) decreases strongly with the...
Uranium Doping and Thermal Neutron Irradiation Flux Pinning Effects in MgB2 (2004)
Silver, T. M., Horvat, J., Reinhard, M., Yao, P., Keshavarzi, S., Munroe, P., ...
The U/n method is a well-established means of improving flux pinning and critical current performance in cuprate superconductors. The method involves the doping of the superconductor with 235U...
Uranium Doping and Thermal Neutron Irradiation Flux Pinning Effects in MgB2 (2004)
Silver, T. M., Horvat, J., Reinhard, M., Yao, P., Keshavarzi, S., Munroe, P., ...
The U/n method is a well-established means of improving flux pinning and critical current performance in cuprate superconductors. The method involves the doping of the superconductor with 235U...
Superconducting screening on different length scales in high-quality bulk MgB2 superconductor (2004)
Horvat, J., Soltanian, S., Pan, A. V., Wang, X. L.
High quality bulk MgB2 exhibit a structure of voids and agglomeration of crystals on different length-scales. Because of this, the superconducting currents percolate between the voids in the ensuing...
Superconducting screening on different length scales in high-quality bulk MgB2 superconductor (2004)
Horvat, J., Soltanian, S., Pan, A. V., Wang, X. L.
High-quality bulk MgB2 exhibits a structure of voids and agglomeration of crystals on different length-scales. Because of this, the superconducting currents percolate between the voids in the ensuing...
James, M., Cassidy, D., Wilson, K. F., Horvat, J., Withers, R. L.
We have demonstrated that SrCoO3-d can be stabilised into phase pure perovskite forms by the introduction of small amounts ~5% of certain rare earth ions (Sm3+ - Yb3+). At the same doping levels,...
Effect of sample size on magnetic Jc for MgB2 superconductor (2004)
Horvat, J., Soltanian, S., Wang, X. L., Dou, S. X.
A strong effect of sample size on magnetic Jc(H) was observed for bulk MgB2 when Jc is obtained directly from the critical state model. Thus obtained zero-field Jc (Jc0) decreases strongly with the...
Uranium Doping and Thermal Neutron Irradiation Flux Pinning Effects in MgB2 (2004)
Silver, T. M., Horvat, J., Reinhard, M., Yao, P., Keshavarzi, S., Munroe, P., ...
The U/n method is a well-established means of improving flux pinning and critical current performance in cuprate superconductors. The method involves the doping of the superconductor with 235U...
Effect of carbon nanotube doping on critical current density of MgB2 superconductor (2003)
Dou, S. X., Yeoh, W. K., Horvat, J., Ionescu, M.
The effect of doping MgB2 with carbon nanotubes on transition temperature, lattice parameters, critical current density and flux pinning was studied for MgB2-xCx with x = 0, 0.05, 0.1, 0.2, and 0.3....
Effect of carbon nanotube doping on critical current density of MgB2 superconductor (2003)
Dou, S. X., Yeoh, W. K., Horvat, J., Ionescu, M.
The effect of doping MgB2 with carbon nanotubes on transition temperature, lattice parameters, critical current density and flux pinning was studied for MgB2-xCx with x = 0, 0.05, 0.1, 0.2, and 0.3....
Comparative study of in situ and ex situ MgB2 films deposited by pulsed laser deposition (2003)
Zhao, Y., Ionescu, M., Horvat, J., Dou, S. X.
Two types of MgB2 films were prepared by pulsed laser deposition (PLD) with in situ and ex situ annealing processes respectively. Significant differences in properties between the two types of films...
Si doping on MgB2 thin films by pulsed laser deposition (2003)
Zhao, Y., Ionescu, M., Horvat, J., Li, A. H., Dou, S. X.
A series of MgB2 thin films were fabricated by pulsed laser deposition (PLD), doped with various amounts of Si up to a level of 18wt%. Si was introduced into the PLD MgB2 films by sequential ablation...
Effect of carbon nanotube doping on critical current density of MgB2 superconductor (2003)
Dou, S. X., Yeoh, W. K., Horvat, J., Ionescu, M.
The effect of doping MgB2 with carbon nanotubes on transition temperature, lattice parameters, critical current density and flux pinning was studied for MgB2-xCx with x = 0, 0.05, 0.1, 0.2 and 0.3....
Ocjena preoblikovanja kosti nakon endodontske terapije periapeksne lezije (2003)
Kuiš, D., Kovačević, M., Tamarut, T., Bešlić, S., Šnjarić, D., Horvat, J.
Svrha je istraživanja ocijentit preoblikovanje kosti mjereći površinu osteoida, debljinu osteoida, osteoklasni indeks i broj upalnih stanica nakon dviju različitih endodontskih terapija...
Utjecaj doksiciklina na preoblikovanje kosti nakon terapije periapeksne lezije (2003)
Šnjarić, D., Kovačević, M., Bešlić, S., Tamarut, T., Horvat, J., Kuiš, D.
Svrha je istraživanja bila ocijeniti preoblikovanje kosti nakon endodontske terapije periapeksnih lezija kombinirane s uporabom doksiciklina, mjerenjem površine osteoida, debljine osteoida,...
Marinaro, D. G., Horvat, J., Dou, S. X.
We report on the vortex dimensionality of uranium-doped Ag/Bi2223 tapes, before and after irradiation to a thermal-neutron fluence. The effective activation energies, as a function of current density...
Marinaro, D. G., Horvat, J., Dou, S. X.
We report on the vortex dimensionality of uranium-doped Ag/Bi2223 tapes, before and after irradiation to a thermal-neutron fluence. The effective activation energies, as a function of current density...
Dou, S. X., Pan, A. V., Zhou, S., Ionescu, M., Wang, X. L., Horvat, J., ...
We investigated the effect of SiC nanoparticle doping on the crystal lattice structure, critical temperature Tc, critical current density Jc, and flux pinning in MgB2 superconductor. A series of...
Dou, S. X., Pan, A. V., Zhou, S., Ionescu, M., Wang, X. L., Horvat, J., ...
We investigated the effect of SiC nanoparticle doping on the crystal lattice structure, critical temperature Tc, critical current density Jc, and flux pinning in MgB2 superconductor. A series of...
Li, S., White, T., Laursen, K., Tan, T. T., Sun, C. Q., Dong, Z. L., ...
In this work, we report the discovery of a vortex pinning source: semicrystalline defect wells in self-aligned nanostructured MgB2. It is demonstrated that these aperiodic regions trap numerous...
Li, S., White, T., Laursen, K., Tan, T. T., Sun, C. Q., Dong, Z. L., ...
In this work, we report the discovery of a vortex pinning source: semicrystalline defect wells in self-aligned nanostructured MgB2. It is demonstrated that these aperiodic regions trap numerous...
Magnesium diboride superconducting wires give the largest critical current density (Jc) when produced with iron sheath. Because iron is ferromagnetic, it is expected to improve the field dependence...
Magnetic shielding in MgB2/Fe superconducting wires (2003)
Horvat, J., Soltanian, S., Wang, X. L., Dou, S. X.
Transport critical current (I/sub c/) was measured for MgB/sub 2//Fe round wires, with the magnetic field oriented perpendicular to the wire and parallel to it. Measurements were made on a wire with...
Magnetic hysteresis and relaxation in Bi2212 single crystals doped with Fe and Pb (2003)
Uprety, K. K., Horvat, J., Wang, X. L., Gu, G. D., Ionescu, M., Liu, H. K., ...
Magnetic hysteresis and magnetic relaxation measurements have been performed to study vortex pinning behaviors for pure, Fe doped and heavily Pb doped Bi2212 single crystals. Unlike pure and Fe doped...
Transport critical current density in Fe-sheathed nano-SiC doped MgB/sub 2/ wires (2003)
Dou, S. X., Horvat, J., Soltanian, S., Wang, X. L., Qin, M. J., Zhou, S. H., ...
The nano-SiC doped MgB/sub 2//Fe wires were fabricated using a powder-in-tube method and an in-situ reaction process. The depression of T/sub c/ with increasing SiC doping level remained rather small...
Soltanian, S., Wang, X. L., Horvat, J., Qin, M. J., Liu, H. K., Munroe, P. R., ...
SiC doped MgB/sub 2/ polycrystalline samples were fabricated by in-situ reaction using different grain sizes (20 nm, 100 nm, and 37 /spl mu/m) of SiC and different doping levels (0, 8, 10, 12, 15...
A comparison of Ag and Ag-alloy sheathed Bi-2223 tapes (2003)
Liu, H. K., Zhang, Z. M., Zeng, R., Horvat, J., Apperley, M.
Ag and Ag-alloy sheathed Bi-2223 tapes were fabricated by a powder-in-tube technique with different configurations of the precursor and restack sheath materials: Ag, AgAu7 wt%, AgSb0.6 wt%, AgMg0.2...
Magnetic shielding in MgB2/Fe superconducting wires (2003)
Horvat, J., Soltanian, S., Wang, X. L., Dou, S. X.
Transport critical current (I/sub c/) was measured for MgB/sub 2//Fe round wires, with the magnetic field oriented perpendicular to the wire and parallel to it. Measurements were made on a wire with...
Magnetic hysteresis and relaxation in Bi2212 single crystals doped with Fe and Pb (2003)
Uprety, K. K., Horvat, J., Wang, X. L., Gu, G. D., Ionescu, M., Liu, H. K., ...
Magnetic hysteresis and magnetic relaxation measurements have been performed to study vortex pinning behaviors for pure, Fe doped and heavily Pb doped Bi2212 single crystals. Unlike pure and Fe doped...
Transport critical current density in Fe-sheathed nano-SiC doped MgB/sub 2/ wires (2003)
Dou, S. X., Horvat, J., Soltanian, S., Wang, X. L., Qin, M. J., Zhou, S. H., ...
The nano-SiC doped MgB/sub 2//Fe wires were fabricated using a powder-in-tube method and an in-situ reaction process. The depression of T/sub c/ with increasing SiC doping level remained rather small...
Soltanian, S., Wang, X. L., Horvat, J., Qin, M. J., Liu, H. K., Munroe, P. R., ...
SiC doped MgB/sub 2/ polycrystalline samples were fabricated by in-situ reaction using different grain sizes (20 nm, 100 nm, and 37 /spl mu/m) of SiC and different doping levels (0, 8, 10, 12, 15...
A comparison of Ag and Ag-alloy sheathed Bi-2223 tapes (2003)
Liu, H. K., Zhang, Z. M., Zeng, R., Horvat, J., Apperley, M.
Ag and Ag-alloy sheathed Bi-2223 tapes were fabricated by a powder-in-tube technique with different configurations of the precursor and restack sheath materials: Ag, AgAu7 wt%, AgSb0.6 wt%, AgMg0.2...
Marinaro, D., Horvat, J., Dou, S. X., Weinstein, R., Gandini, A.
We report on the vortex dimensionality of uranium-doped Ag/Bi2223 tapes, before and after irradiation to a thermal-neutron fluence. The effective activation energies as a function of current density...
Uranium Doping and Thermal Neutron Irradiation Flux Pinning Effects in MgB2 (2003)
Silver, T., Horvat, J., Reinhard, M., Pei, Y., Keshavarzi, S., Munroe, P., ...
The U/n method is a well-established means of improving flux pinning and critical current performance in cuprate superconductors. The method involves the doping of the superconductor with 235U...
The effect of sample size on field dependence of Jc for MgB2 superconductor (2003)
Horvat, J., Soltanian, S., Wang, X. L., Dou, S. X.
A strong effect of sample size on magnetic Jc(H) was observed for bulk MgB2 when Jc is obtained directly from the critical state model. Thus obtained zero-field Jc (Jc0) decreases strongly with the...