Origin of the Superconductivity in the Y-Sr-Ru-O and Y-Sr-Cu-O Systems (2007)
Galstyan, E., Xue, Y. Y., Iliev, M. N., Sun, Y., Chu, C. W.
We report on the structural, magnetic, and Raman-scattering studies of double perovskite structure Sr2Y(Ru1-xCux)O6-d systems made by systematic synthesis processes with various numbers of doping...
Plasma-Like Negative Capacitance in Nano-Colloids (2006)
Shulman, J., Tsui, S., Chen, F., Xue, Y. Y., Chu, C. W.
A negative capacitance has been observed in a nano-colloid between 0.1 and 10^-5 Hz. The response is linear over a broad range of conditions. The low-omega dispersions of both the resistance and...
Mechanism and Scalability in Resistive Switching of Metal-Pr0.7Ca0.3MnO3 Interface (2006)
Tsui, S., Wang, Y. Q., Xue, Y. Y., Chu, C. W.
The polarity-dependent resistive-switching across metal-Pr0.7Ca0.3MnO3 interfaces is investigated. The data suggest that shallow defects in the interface dominate the switching. Their density and...
Chu, C. W., Chen, F., Shulman, J., Tsui, S., Xue, Y. Y., Wen, W., ...
The significance of a negative dielectric constant has long been recognized. We report here the observation of a field-induced large negative dielectric constant of aggregates of oxide nano-particles...
CHEN, F., SHULMAN, J., TSUI, S., XUE, Y. Y., WEN, W., SHENG, P., ...
The analogy between magnetism and electricity has long been established by Maxwell in the 19th century, in spite of their subtle difference. While magnetic materials display paramagnetism,...
CXCL11 attenuates bleomycin-induced pulmonary fibrosis via inhibition of vascular remodeling (2005)
Burdick, M D, Murray, L A, Keane, M P, Xue, Y Y, Zisman, D A, Belperio, J A, ...
Aberrant vascular remodeling is a central hallmark for the development and progression of idiopathic pulmonary fibrosis. The mechanisms underlying the pathophysiologic alterations, however, are...
Circulating fibrocytes traffic to the lungs in response to CXCL12 and mediate fibrosis (2004)
Phillips, R J, Burdick, M D, Hong, K, Lutz, M A, Murray, L A, Xue, Y Y, ...
Previous reports have identified a circulating pool of CD45(+) collagen I+ CXCR4(+) (CD45(+)Col I(+)CXCR4(+)) cells, termed fibrocytes, that traffic to areas of fibrosis. No studies have demonstrated...
Field-Induced Resistive Switching in Metal-Oxide Interfaces (2004)
Tsui, S., Baikalov, A., Cmaidalka, J., Sun, Y. Y., Wang, Y. Q., Xue, Y. Y., ...
We investigate the polarity-dependent field-induced resistive switching phenomenon driven by electric pulses in perovskite oxides. Our data show that the switching is a common occurrence restricted...
Water Content and Superconductivity in Na0.3CoO2*yH2O (2003)
Cmaidalka, J., Baikalov, A., Xue, Y. Y., Meng, R. L., Chu, C. W.
We report here the correlation between the water content and superconductivity in Na0.3CoO2*yH2O under the influences of elevated temperature and cold compression. The x-ray diffraction of the sample...
Xue, Y. Y., Chen, F., Cmaidalka, J., Meng, R. L., Chu, C. W.
The macroscopic magnetizations of Ru_1-xCu_xSr_2EuCu_2O_8+d with x between 0 and 0.15 were investigated. A ferromagnet-like transition as well as an antiferromagnet-like transition appear around T_M...
Field-Driven Hysteretic and Reversible Resistive Switch at the Ag-Pr0.7Ca0.3MnO3 Interface (2002)
Baikalov, A., Wang, Y. Q., Shen, B., Lorenz, B., Tsui, S., Sun, Y. Y., ...
The hysteretic and reversible polarity-dependent resistive switch driven by electric pulses is studied in both Ag/Pr0.7Ca0.3MnO3/YBa2Cu3O7 sandwiches and single-layer Pr0.7Ca0.3MnO3 strips. The data...
Phase Separation, Magnetism and Superconductivity in Rutheno-Cuprates (2002)
Lorenz, B., Xue, Y. Y., Chu, C. W.
The properties of the superconducting ferromagnets RuSr2(Gd/Eu)Cu2O8 and RuSr2(Ln/Ce)2Cu2O10 are reviewed. The problem of coexistence and competition between magnetic and superconducting states is...
Magnetic Transitions and Ferromagnetic Clusters in RuSr2(Eu,Ce)2Cu2O10+d (2002)
Xue, Y. Y., Lorenz, B., Cao, D. H., Chu, C. W.
The macroscopic magnetizations of a RuSr2(Eu0.7Ce0.3)2Cu2O10+d sample were investigated. A ferromagnet-like transition occurs around T_M in the low-field magnetization. Highly nonlinear M(H),...
Superconductivity in the C32 Intermetallic Compounds AAl(2-x)Si(x), with A=Ca and Sr, and 0.6 (2002)
Lorenz, B., Lenzi, J., Cmaidalka, J., Meng, R. L., Sun, Y. Y., Xue, Y. Y., ...
The intermetallic compounds AAl2-xSix, where A = Ca, Sr or Ba, crystallize in the C32 structure, same as the recently discovered MgB2 with a high superconducting transition temperature of 39 K. For x...
Xue, Y. Y., Lorenz, B., Baikalov, A., Cao, D. H., Li, Z. G., Chu, C. W.
The hole concentration (p)(delta), the transition temperature Tc, the intragrain penetration depth lambda, and the Meissner effect were measured for annealed RuSr2(Gd,Ce)2Cu2O10+delta samples. The...
Lorenz, B., Meng, R. L., Xue, Y. Y., Chu, C. W.
The superconducting ferromagnet RuSr2GdCu2O8 was investigated at high pressure. The intra-grain superconducting transition temperature, Tc, is resolved in ac-susceptibility as well as resistivity...
Superconductivity in pure and electron doped MgB2: Transport properties and pressure effects (2001)
Lorenz, B., Xue, Y. Y., Meng, R. L., Chu, C. W.
The normal state and superconducting properties of MgB2 and Mg1-xAlxB2 are discussed based on structural, transport, and high pressure experiments. The positive Seebeck coefficient and its linear...
Evidence for Possible Phase-Separations in RuSr2(Gd,Ce)2Cu2O10-delta (2001)
Xue, Y. Y., Cao, D. H., Lorenz, B., Chu, C. W.
An unusual thermal-magnetic hysteresis was observed between a minor magnetic transition around 120 K and the main one at 80 K in superconducting RuSr2(R,Ce)2Cu2O10-delta (Ru1222R) samples, where R =...
Correlation between the residual resistance ratio and magnetoresistance in MgB2 (2001)
Chen, X. H., Wang, Y. S., Xue, Y. Y., Meng, R. L., Wang, Y. Q., Chu, C. W.
The resistivity and magnetoresistance in the normal state for bulk and thin-film MgB2 with different nominal compositions have been studied systematically. These samples show different temperature...
Unusual Field-Dependence of the Intragrain Superconductive Transition in RuSr2EuCu2O8 (2001)
Lorenz, B., Xue, Y. Y., Meng, R. L., Chu, C. W.
A narrow intragrain phase-lock transition was observed in RuSr2EuCu2O8 under a magnetic field H up to a few Tesla. The corresponding transition temperature, T2, decreases rapidly (about 100 K/T at...
Nonstoichiometry, Defects and Transport Properties in MgB2 (2001)
Xue, Y. Y., Meng, R. L., Lorenz, B., Meen, J. K., Sun, Y. Y., Chu, C. W.
The local composition Mg:B of MgB2 powder was systematically changed through annealing. Correlations were observed between the Mg loss and the lattice parameters a/c and the microstrain of MgB2....
Thermoelectric power and transport properties of pure and Al-doped MgB2 (2001)
Lorenz, B., Meng, R. L., Xue, Y. Y., Chu, C. W.
We have measured the thermoelectric power, S, and resistivity, rho, of pure and Al-doped MgB2. S is positive and increases linearly with temperature above the superconducting transition temperature,...
Penetration Depth and Anisotropy in MgB2 (2001)
Chen, X. H., Xue, Y. Y., Meng, R. L., Chu, C. W.
The penetration depth lambda of MgB2 was deduced from both the ac susceptibility chi and the magnetization M(H) of sorted powders. The good agreement between the two sets of data without geometric...
Field-Induced Crossover and Colossal Magnetoresistance in La(0.7)Pb(0.3)MnO(3) (2000)
Xue, Y. Y., Lorenz, B., Heilman, A. K., Gospodinov, M., Dobreva, S. G., Chu, C. W.
A field-induced crossover is observed in the resistivity and magnetization (M) of a La(0.7)Pb(0.3)MnO(3) single crystal. The field-dependence of the resistivity and M suggests that a small...
A Possible Crypto-Superconducting Structure in a Superconducting Ferromagnet (2000)
Chu, C. W., Xue, Y. Y., Tsui, S., Cmaidalka, J., Heilman, A. K., Lorenz, B., ...
We have measured the dc and ac electrical and magnetic properties in various magnetic fields of the recently reported superconducting ferromagnet RuSr2GdCu2O8. Our reversible magnetization...
Absence of a Bulk Meissner State in RuSr2GdCu2O8 (1999)
Chu, C. W., Xue, Y. Y., Meng, R. L., Cmaidalka, J., Dezaneti, L. M., Wang, Y. S., ...
We have systematically investigated the magnetic, electrical, and structural properties of RuSr2GdCu2O8, in which a long-range ferromagnetic order and superconductivity have been previously reported...
Superconductivity-induced phonon renormalization in (Cu, C)Ba2Ca3Cu4Oz superconductor. (1998)
Hadjiev, V. G., Cardona, M., Du, Z. L., Xue, Y. Y., Chu, C. W.
Arenberg, D A, Keane, M P, DiGiovine, B, Kunkel, S L, Morris, S B, Xue, Y Y, ...
We report here the role of the CXC chemokine, epithelial neutrophil activating peptide (ENA-78), as an angiogenic factor in human non-small cell lung cancer (NSCLC). In freshly isolated human...
Arenberg, D A, Keane, M P, DiGiovine, B, Kunkel, S L, Morris, S B, Xue, Y Y, ...
We report here the role of the CXC chemokine, epithelial neutrophil activating peptide (ENA-78), as an angiogenic factor in human non-small cell lung cancer (NSCLC). In freshly isolated human...