Lower Critical Fields of Superconducting PrFeAsO$_{1-y}$ Single Crystals (2008)
Okazaki, R., Konczykowski, M., Van Der Beek, C. J., Kato, T., Hashimoto, K., Shimozawa, M., ...
We have studied the lower critical fields H_{c1} of superconducting iron oxipnictide PrFeAsO_{1-y} single crystals for H parallel and perpendicular to the ab-planes. Measurements of the local...
Superfluid Density and Quasiparticle Scattering Rate in Ba_{1-x}K_xFe_2As_2 Single Crystals (2008)
Hashimoto, K., Shibauchi, T., Kasahara, S., Ikada, K., Kato, T., Okazaki, R., ...
We report high-sensitivity microwave measurements of the in-plane penetration depth $\lambda_{ab}$ in several single crystals of hole-doped Fe-based superconductor Ba$_{1-x}$K$_x$Fe$_2$As$_2$. We...
Shibauchi, T., Konczykowski, M., Van Der Beek, C. J., Okazaki, R., Matsuda, Y., Yamaura, J., ...
A miniature Hall sensor array was used to detect magnetic induction locally in the vortex states of the $\beta$-pyrochlore superconductor KOs$_2$O$_6$. Below the first-order transition at $T_{\rm...
Okazaki, R., Kasahara, Y., Shishido, H., Konczykowski, M., Behnia, K., Haga, Y., ...
We find that in ultraclean heavy-fermion superconductor URu$_2$Si$_2$ ($T_{c0}=1.45$ K) a distinct flux line lattice melting transition with outstanding characters occurs well below the mean-field...
Avraham, Nurit, Goldschmidt, Y. Y., Liu, J. T., Myasoedov, Y., Rappaport, M., Zeldov, E., ...
The behavior of vortex matter in $\mathrm{Bi_{2}Sr_{2}CaCu_{2}O_{8}}$ in the presence of a low concentration of tilted columnar defects (CDs) was studied using magneto-optical measurements and...
Slowing down Josephson vortex lattice in Bi_2Sr_2CaCu_2O_{8+d} with pancake vortices (2006)
Koshelev, A. E., Latyshev, Yu. I., Konczykowski, M.
We study theoretically and experimentally influence of pancake vortices on motion of the Josephson vortex lattice in layered high-temperature superconductors. Mobility of the Josephson vortices in...
Transfer of magnetization by spin injection between both interfaces of a Ni nanowire (2005)
Dubey, M., Wade, T., Konczykowski, M.
Magnetization switching provoked by spin-injection is studied in Ni nanowires of various size and morphology. The response of the magnetization to the spin-injection is studied as a function of the...
Vortex correlations in the liquid states of Bi2Sr2CaCu2O8+y with tilted columnar defects (2005)
Kameda, N., Shibauchi, T., Tokunaga, M., Ooi, S., Tamegai, T., Konczykowski, M.
The interlayer and intralayer vortex correlations are studied in Bi2Sr2CaCu2O8+y with tilted and nontilted columnar defects (CDs) by the Josephson plasma-resonance experiments under various field...
Conductance in multiwall carbon nanotubes and semiconductor nanowires (2005)
Dayen, J.F., Wade, T.L., Konczykowski, M., Wegrowe, J.E., Hoffer, X.
Electronic transport in an ensemble of multiwall carbon nanotubes and semiconductor nanowires was compared. The nanotubes and nanowires are obtained by template synthesis and are contacted in a...
Vortex correlations in the liquid states of Bi2Sr2CaCu2O8+y with tilted columnar defects (2005)
Kameda, N., Shibauchi, T., Tokunaga, M., Ooi, S., Tamegai, T., Konczykowski, M.
The interlayer and intralayer vortex correlations are studied in Bi2Sr2CaCu2O8+y with tilted and nontilted columnar defects (CDs) by the Josephson plasma-resonance experiments under various field...
Hoffer, X., Wade, T. L., Konczykowski, M.
Electronic transport in multiwall carbon nanotubes and semiconductor nanowires was compared. In both cases, the non ohmic behavior of the conductance, the so-called zero bias anomaly, shows a...
Vortex nanoliquid in high-temperature superconductors (2004)
Banerjee, S. S., Goldberg, S., Soibel, A., Myasoedov, Y., Rappaport, M., Zeldov, E., ...
Using a differential magneto-optical technique to visualize flow of transport currents, we reveal a new delocalization line within the reversible vortex liquid region in the presence of a low density...
Kameda, N., Tokunaga, M., Tamegai, T., Konczykowski, M., Okayasu, S.
We study the Josephson plasma resonance (JPR) in Bi$_2$Sr$_2$CaCu$_2$O$_{8+y}$ (BSCCO) with spatially dependent interlayer-phase coherence (IPC). The half-irradiated BSCCO (HI-BSCCO), in which...
Colson, S., Van Der Beek, C. J., Konczykowski, M., Gaifullin, M. B., Matsuda, Y., Gierlowski, P., ...
The introduction of a large density of columnar defects in %underdoped Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+\delta}$ crystals does not, at sufficiently low vortex densities, increase the irreversibility...
Vortex-lattice melting front in thin superconductors with pinning (2004)
Indenbom,M. V., Brandt,E. H., Van Der Beek,C. J., Konczykowski,M.
Vortex-lattice melting front in thin superconductors with pinning (2004)
Indenbom, M. V., Brandt, E. H., Van Der Beek, C. J., Konczykowski, M.
First Order Transition of the Vortex Lattice in Disordered Bi-2212 Crystals (2003)
Van Der Beek, C. J., Abalosheva, I., Konczykowski, M., Li, Ming, Kes, P. H., Indenbom, M. V.
Using differential magneto-optical imaging, we address the question of mesoscopic inhomogeneity in underdoped Bi-2212 single crystals. Among other features, it is shown that an anomalous temperature...
Transfer of magnetization by spin injection between both interfaces of a Ni nanowire (2003)
Dubey, M., Wade, T., Konczykowski, M.
Magnetization switching provoked by spin-injection is studied in Ni nanowires of various size and morphology. The response of the magnetization to the spin-injection is studied as a function of the...
Melting of 'porous' vortex matter (2003)
Banerjee, S. S., Soibel, A., Myasoedov, Y., Rappaport, M., Zeldov, E., Menghini, M., ...
Bitter decoration and magneto-optical studies reveal that in heavy-ion irradiated superconductors, a 'porous' vortex matter is formed when vortices outnumber columnar defects (CDs). In this state...
Transfer of magnetization by spin injection between both interfaces of a Ni nanowire (2003)
Dubey, M., Wade, T., Konczykowski, M.
Magnetization switching provoked by spin-injection is studied in Ni nanowires of various size and morphology. The response of the magnetization to the spin-injection is studied as a function of the...
Transfer of magnetization by spin injection between both interfaces of a Ni nanowire (2003)
Dubey, M., Wade, T., Konczykowski, M.
Magnetization switching provoked by spin-injection is studied in Ni nanowires of various size and morphology. The response of the magnetization to the spin-injection is studied as a function of the...
First order phase transition from the vortex liquid to an amorphous solid (2002)
Menghini, M., Fasano, Yanina, Banerjee, S. S., Myasoedov, Y., Zeldov, E., ...
We present a systematic study of the topology of the vortex solid phase in superconducting Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8}$ samples with low doses of columnar defects. A new state of vortex matter...
"Vortex-melting front" in thin superconductors with pinning (2002)
Indenbom, M. V., Brandt, E. H., Van Der Beek, C. J., Konczykowski, M.
Magneto-optical observations of a second flux front, which occurs at the second peak in the magnetization of Bi_2 Sr_2 CaCu_2 O_x single crystals related to the known first order ``vortex-lattice...
Vortex fluctuations in underdoped Bi2Sr2CaCu2O8+d crystals (2002)
Colson, S., Konczykowski, M., Gaifullin, M. B., Matsuda, Y., Gierlowski, P., Li, M., ...
Vortex thermal fluctuations in heavily underdoped Bi2Sr2CaCu2O8+d (Tc=69.4 K) are studied using Josephson plasma resonance (JPR). From the data in zero magnetic field, we obtain the penetration depth...
Strong Pinning in High Temperature Superconductors (2002)
Van Der Beek, C. J., Konczykowski, M., Abaloshev, A., Abalosheva, I., Gierlowski, P., Lewandowski, S., ...
Detailed measurements of the critical current density jc of YBa2Cu3O7 films grown by pulsed laser deposition reveal the increase of jc as function of the filmthickness. Both this thickness dependence...
Self-doping caused by oxygen displacements in heavy-ion-irradiated Bi2Sr2CaCu2O8+x crystals (2002)
Li, M., Van Der Beek, C.J., Konczykowski, M., Zandbergen, H.W., Kes, P.H.
Izawa, K., Shibata, A., Matsuda, Yuji, Kato, Y., Takeya, H., Hirata, K., ...
We have measured the low temperature heat capacity Cp and microwave surface impedance Zs in the vortex state of YNi_2B_2C. In contrast to conventional s-wave superconductors, Cp shows a nearly \sqrt...
Deviations from Matthiessen's Rule for ${\rm SrRuO_3}$ and ${\rm CaRuO_3}$ (2000)
Klein, L., Kats, Y., Wiser, N., Konczykowski, M., Reiner, J. W., Geballe, T. H., ...
We have measured the change in the resistivity of thin films of ${\rm SrRuO_3}$ and ${\rm CaRuO_3}$ upon introducing point defects by electron irradiation at low temperatures, and we find significant...
Defect-unbinding and the Bose-glass transition in layered superconductors (2000)
Van Der Beek, C. J., Konczykowski, M., Samoilov, A. V., Chikumoto, N., Bouffard, S., Feigel'man, M. V.
The low-field Bose-glass transition temperature in heavy-ion irradiated Bi_2Sr_2CaCu_2O_8+d increases progressively with increasing density of irradiation-induced columnar defects, but saturates for...
Shear-induced vortex decoupling in Bi2Sr2CaCu2O8 crystals (2000)
Khaykovich, B., Fuchs, D. T., Teitelbaum, K., Myasoedov, Y., Tamegai, E. Zeldov T., Ooi, S., ...
Simultaneous transport and magnetization studies in Bi2Sr2CaCu2O8 crystals at elevated currents reveal large discrepancies, including finite resistivity at temperatures of 40K below the magnetic...
Supercooling of the disordered vortex lattice in Bi_2Sr_2CaCu_2O_8+d (1999)
Van Der Beek, C. J., Colson, S., Indenbom, M. V., Konczykowski, M.
Time-resolved local induction measurements near to the vortex lattice order-disorder transition in optimally doped Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+\delta}$ single crystals shows that the high-field,...
Supercooling of the high field vortex phase in single crystalline BSCCO (1999)
Van Der Beek, C. J., Colson, S., Konczykowski, M., Indenbom, M. V.
Time resolved magneto-optical images show hysteresis associated with the transition at the so-called ``second magnetization peak'' at B_sp in single-crystalline Bi_2Sr_2CaCu_2O_8+d. By rapid...
Magnetic relaxation in the "Bragg-glass" phase in BSCCO (1999)
Van Der Beek, C. J., Colson, S., Konczykowski, M., Indenbom, M. V., Drost, R. J., Kes, P. H.
Magnetic relaxation in the Bragg-glass phase of overdoped Bi_2Sr_2CaCu_2O_8 crystals was investigated using time-resolved magneto-optical visualisation of the flux distribution. This has permitted us...
Magnetization Decay due to Vortex Phase Boundary Motion in BSCCO (1999)
Konczykowski, M., Van Der Beek, C. J., Colson, S., Indenbom, M. V., Kes, P. H., Platiel, Y., ...
We identify a new regime of decay of the irreversible magnetization in clean Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8}$ crystals, at induction values close to the ``second peak field'' at which the bulk...
Melting of regular and decoupled vortex lattices in BSCCO crystals (1999)
Konczykowski, M., Van Der Beek, C. J., Indenbom, M. V., Zeldov, E.
The angular dependence of the first-order phase transition (FOT) in the vortex lattice in Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8}$ crystals was investigated by a low frequency AC shielding technique (with...
Phase Diagram of Heavy-Ion Irradiated Bi_2Sr_2CaCu_2O_8 (1999)
Van Der Beek, C. J., Konczykowski, M., Drost, R. J., Kes, P. H., Samoilov, A. V., Chikumoto, N., ...
Using dynamic and thermodynamic magnetization measurements, we analyze the phase diagram of Bi_2Sr_2CaCu_2O_8delta single crystals containing amorphous columnar defects created by heavy-ion...
Do columnar defects produce bulk pinning? (1999)
Indenbom, M. V., Van Der Beek, C. J., Konczykowski, M., Holtzberg, F.
From magneto-optical imaging performed on heavy-ion irradiated YBaCuO single crystals, it is found that at fields and temperatures where strong single vortex pinning by individual irradiation-induced...
Entropy, vortex interactions, and the phase diagram of heavy-ion irradiated Bi_2Sr_2CaCu_2O_8 (1999)
Van Der Beek, C. J., Konczykowski, M., Drost, R. J., Kes, P. H., Chikumoto, N., Bouffard, S.
Dynamic and thermodynamic magnetization experiments on heavy-ion irradiated single crystalline Bi_{2}Sr_{2}CaCu_{2}O_{8+\delta} are correlated in order to clarify the nature of the mixed state phase...
Tuning the pinning energy in layered superconductors (1999)
Drost, R.J., Van Der Beek, C.J., Zandbergen, H.W., Konczykowski, M., Menovsky, A.A., Kes, P.H.
Prozorov, R., Konczykowski, M., Schmidt, B., Yeshurun, Y., Shaulov, A., Villard, C., ...
We report on measurements of the angular dependence of the irreversibility temperature $T_{irr}(\theta) $ in $YBa_2Cu_3O_{7-\delta }$ thin films, defined by the onset of a third harmonic signal and...
Flux Lattice Melting and Dimensional Crossover in Bi-2212 Single Crystals (1996)
Kes, P., Pastoriza, H., Li, T., Cubitt, R., Forgan, E., Lee, S., ...
Flux lattice melting in Bi2Sr2CaCu2O8+x (Bi-2212) single crystals has recently been studied by various techniques. In this contribution to the I. Schegolev Memorial Volume we review some experiments...
Flux Lattice Melting and Dimensional Crossover in Bi-2212 Single Crystals (1996)
Kes, P., Pastoriza, H., Li, T., Cubitt, R., Forgan, E., Lee, S., ...
Flux lattice melting in Bi2Sr2CaCu2O8+x (Bi-2212) single crystals has recently been studied by various techniques. In this contribution to the I. Schegolev Memorial Volume we review some experiments...
Flux Lattice Melting and Dimensional Crossover in Bi-2212 Single Crystals (1996)
Kes, P., Pastoriza, H., Li, T., Cubitt, R., Forgan, E., Lee, S., ...
Flux lattice melting in Bi2Sr2CaCu2O8+x (Bi-2212) single crystals has recently been studied by various techniques. In this contribution to the I. Schegolev Memorial Volume we review some experiments...
Flux lattice melting and dimensional crossover in Bi-2212 single crystals (1996)
Kes, P H, Pastoriza, H, Li, T W, Cubitt, R, Forgan, E M, Lee, S L, ...
Jiang, W., Reed, D. S., Kriplani, U., Beam, D. A., Konczykowski, M., ...
Experimental evidence of a Bose-glass transition in the vortex state of YBa2Cu3O7 single crystals with columnar defects along the c axis is manifested by the universal critical exponents ν⊥, ν∥...
The La (Ba2-xLax)Cu3- yOz single crystals : structures and conductivity (1989)
Collin, G., Audier, A.C., Albouy, P.A., Senoussi, S., Comes, R., Konczykowski, M., ...
The crystal structure of the orthorhombic and tetragonal phases of La(Ba 2-xLax)Cu3-yO 6+x/2-y+ z are determined on twinned crystals. The orthorhombic structure, obtained for low x, is close to the...
The La (Ba2-xLax)Cu3- yOz single crystals : structures and conductivity (1989)
Collin, G., Audier, A.C., Albouy, P.A., Senoussi, S., Comes, R., Konczykowski, M., ...
The crystal structure of the orthorhombic and tetragonal phases of La(Ba 2-xLax)Cu3-yO 6+x/2-y+ z are determined on twinned crystals. The orthorhombic structure, obtained for low x, is close to the...
The La (Ba2-xLax)Cu3- yOz single crystals : structures and conductivity (1989)
Collin, G., Audier, A.C., Albouy, P.A., Senoussi, S., Comes, R., Konczykowski, M., ...
The crystal structure of the orthorhombic and tetragonal phases of La(Ba 2-xLax)Cu3-yO 6+x/2-y+ z are determined on twinned crystals. The orthorhombic structure, obtained for low x, is close to the...