Search Results - "PERKINS, G. K"

Direct observation of magnetic monopole defects in an artificial spin-ice system by Branford, W. R, Ladak, S, Read, D. E, Perkins, G. K, Cohen, L. F

“…Free monopoles have fascinated and eluded researchers since their prediction by Dirac in 1931. In spin ice, the bulk frustrated magnet, local ordering…”
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Enhancement of the high-magnetic-field critical current density of superconducting MgB2 by proton irradiation by Bugoslavsky, Y, Cohen, L F, Perkins, G K, Polichetti, M, Tate, T J, Gwilliam, R, Caplin, A D

“…Magnesium diboride, MgB2, has a relatively high superconducting transition temperature, placing it between the families of low- and high-temperature (copper…”
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Vortex dynamics in superconducting MgB2 and prospects for applications by BUGOSLAVSKY, Y, PERKINS, G. K, QI, X, COHEN, L. F, CAPLIN, A. D

“…The recently discovered superconductor magnesium diboride, MgB2, has a transition temperature, Tc, approaching 40 K, placing it intermediate between the…”
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Controlling spin pumping into superconducting Nb by proximity-induced spin-triplet Cooper pairs by Chan, A. K., Cubukcu, M., Montiel, X., Komori, S., Vanstone, A., Thompson, J. E., Perkins, G. K., Kinane, C. J., Caruana, A. J., Boldrin, D., Blamire, M., Robinson, J., Eschrig, M., Kurebayashi, H., Cohen, L. F.

“…Proximity-induced long-range spin-triplet supercurrents, important for the field of superconducting spintronics, are generated in superconducting/ferromagnetic…”
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First order magnetic transition in doped CeFe2 alloys: phase coexistence and metastability by Roy, S B, Perkins, G K, Chattopadhyay, M K, Nigam, A K, Sokhey, K J S, Chaddah, P, Caplin, A D, Cohen, L F

“…First order ferromagnetic (FM) to antiferromagnetic (AFM) phase transition in doped CeFe2 alloys is studied with the micro-Hall probe technique. Clear visual…”
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Visual evidence of the magnetic glass state and its re-crystallization in Gd5Ge4 by Chattopadhyay, M. K, Roy, S. B, Morrison, K, Moore, J. D, Perkins, G. K, Cohen, L. F, Gschneidner jr., K. A, Pecharsky, V. K

“…We present the results of scanning Hall probe microscopy experiments on polycrystalline Gd5Ge4 providing visual evidence of the formation of a ”magnetic-glass”…”
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Electron diffusivities in MgB2 from point contact spectroscopy by BUGOSLAVSKY, Y, MIYOSHI, Y, PERKINS, G. K, CAPLIN, A. D, COHEN, L. F, POGREBNYAKOV, A. V, XI, X. X

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Magneto-optical imaging and electromagnetic study of YBa2Cu3O7 vicinal films of variable thickness by POLYANSKII, A, EMERGE, R. L. S, WU, J. Z, AYTUG, T, CHRISTEN, D. K, PERKINS, G. K, LARBALESTIER, D

“…Magneto-optical imaging (MO) and electromagnetic studies have been applied to measure anisotropy and critical currents (J{sub c}) of YBa{sub 2}Cu{sub 3}O{sub…”
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The current–voltage relationship in crystals and conductors by Caplin, A.D, Bugoslavsky, Y, Cohen, L.F, Perkins, G.K

“…The current–voltage characteristics, which can be obtained from either transport or magnetic measurements, reflect the underlying physical mechanism that…”
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High field scanning Hall probe imaging of high temperature superconductors by Perkins, G.K., Bugoslavsky, Yu.V., Qi, X., MacManus-Driscoll, J.L., Caplin, A.D.

“…Power applications of high temperature superconductors (HTS) are emerging rapidly towards the market place. While first generation Bi/sub 2/Sr/sub 2/Ca/sub…”
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Detection of a Micron-Sized Magnetic Particle Using InSb Hall Sensor by Kazakova, O., Gallop, J.C., See, P., Cox, D., Perkins, G.K., Moore, J.D., Cohen, L.F.

“…We present our results on the realization of ultra-sensitive and non-invasive magnetic sensors based on double-cross InSb Hall bars with dimensions down to 1.5…”
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Magnetic properties of MgB2 in the presence of disorder by Cohen, L.F., Bugoslavsky, Y., Perkins, G.K., Moore, J., Miyoshi, Y., Caplin, A.D.

“…The discovery of superconductivity at 39 K in MgB2 and particularly the two gap structure of the quasiparticle DOS has generated a great deal of interest…”
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Enhancement of critical current density of (Pb,Sn)-doped Bi-2212 superconductors at high temperature by Li, Y., Kaviraj, S., Berenov, A., Perkins, G.K., Driscoll, J., Caplin, A.D., Cao, G.H., Ma, Q.Z., Wang, B., Wei, L., Zhao, Z.X.

“…The magnetic properties of ceramic samples of Bi 2−2 x (PbSn) x Sr 2CaCu 2O y ( x=0,0.1,0.2,0.3 and 0.4) superconductors have been investigated using a…”
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Solubility and LPE growth of mixed REBa2Cu3O7-δ by QI, X, PERKINS, G. K, CAPLIN, A. D, MACMANUS-DRISCOLL, J. L

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Stress-field pinning in Eu, Y-123 superconductors by Li, Yang, Perkins, G.K., Caplin, A.D., Cao, Guohui, Ma, Qingzhu, Wei, Long, Zhao, Z.X.

“…The magnetic properties of (Eu 1-xY x)Ba 2Cu 3O 7−y (x=0 and 0.3) superconductors have been investigated by vibrating sample magnetometry (VSM) from 20 to 90 K…”
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Influence of annealing on flux pinning in heavy-ion irradiated YBa2Cu3O7 crystals by Abd el-Salam, M, Perkins, GK, Hebert, S, Damay, F, Driscoll, J, Chen, C, Caplin, AD

“…Changes in superconducting properties due to Pb heavy ion irradiation followed by thermal annealing were investigated in high quality YBa2Cu3O7 single…”
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Transport and magnetisation measurements of Tl-1223 tapes-the nature of current paths and the role of grain boundaries at high magnetic fields by Everett, J., Johnston, M.D., Perkins, G.K., Volkozub, A.V., Caplin, A.D., Moore, J.C., Fox, S., Hyland, D., Grovenor, C.R.M.

“…The key factors that make the thallium-based 1223 phase conductors attractive candidates for high field applications are a high transition temperature (/spl…”
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Reducing the operational magnetic field in the prototype magnetocaloric system Gd5Ge4 by approaching the single cluster size limit by Moore, J. D., Perkins, G. K., Bugoslavsky, Y., Chattopadhyay, M. K., Roy, S. B., Chaddah, P., Pecharsky, V. K., Gschneidner, K. A., Cohen, L. F.

“…We studied polycrystalline samples of the prototype magnetocaloric system Gd5Ge4 using scanning Hall imaging and global magnetometry. The magnetic field…”
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Angular dependence of the order-disorder transition in proton irradiated single crystal MgB2 by MOORE, J. D, PERKINS, G. K, CAPLIN, A. D, JUN, J, KAZAKOV, S. M, KARPINSKI, J, COHEN, L. F

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Critical currents in conductors-exploring the limiting mechanisms by Caplin, A.D., Cohen, L.F., Cuthbert, M.N., Dhalle, M., Lacey, D., Perkins, G.K., Thomas, J.V.

“…The success of the BiSrCaCuO phase conductors in overcoming the "weak-link" problems that plague polycrystalline YBa/sub 2/Cu/sub 3/O/sub 7/ has been…”
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