Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 11 of 11 for “"upper critical field"”.
-
The anisotropy of the upper critical field of chevrel phase compounds
The anisotropy of the upper critical field has been measured on deoxygenated single crystals of the Chevrel phases PbMo6Ss and Cu1.sMo6Ss. Data were taken with the applied field pointing in various directions in the hexagonal (2IO) and (001) planes. At each of a series of field values the …
-
The effect of manganese doping on the superconducting transition temperature and the upper critical field of tin-molybdenum-sulfide
… transition temperature, Tc' and the upper critical field, Hc2 (T), of manganese-doped SnMo6S8 (MnxSn1_xMo6S8)' These samples had reproducible superconducting properties. They were characterized by x-ray powder diffractometry, optical microscopy. electron microscopy, and electron …
-
Experimental observations on some reduced-oxygen Chevrel-phase compounds
… of SnMo6Sg. The temperature dependence of the upper critical field was measured for gettered SnMo6S8 and PbMo6Sg. The initial slope of the critical field is shallower for the gettered compounds than for ungettered compounds. The effects of doping oxygen into the small-cation Chevrel compound …
-
SPIN AND CHARGE TRANSPORT IN 2D MATERIALS AND VAN DER WAALS HETEROSTRUCTURES
… effects, square root dependence of in-plane upper critical field as well as BKT transition. Secondly, spin-polarized tunnel spectroscopy of NbSe2 is presented. The tunnel spectra strongly depend on the magnetization configuration of the tunnel contacts. The result is drastically different …
-
The Development of Tunnel Diode Oscillators And High Magnetic Field Studies of Unconventional Superconductor UTe2: Unveiling the Phase Diagram And Unconventional Hall Effect
… investigation of UTe2 under various magnetic field and pressure conditions by utilizing the Tunnel Diode Oscillator (TDO) and electrical transport. The study is primarily divided into two parts. The first part focuses on the utilization of the TDO to establish a magnetic susceptibility …
-
Thermal conductivity of superconducting alloy films in a perpendicular magnetic field
… of In - Bi alloys in a perpendicular magnetic field. The films were quench-condensed onto glass substrates held at 77 K, and had thicknesses ranging from l050 to 4570 A. The ratios of the BCS coherence length to the electron mean free path for these films were in the range 9 to 10. We made …
-
Growth, fabrication, and measurement of superconducting barium(1-x) potassium bismuth oxygen(3) thin films and devices
… K$ and 10GHz) for the best films. Dissipation in fields up to 5 Tesla suggests that the superconducting coherence length $\xi\approx 38\rm\A$ and upper critical field $\rm H\sb{c2}(0)\approx$ 22T. Tunneling studies were also made using a BKBO electrode, a native oxide barrier, and the following …
-
High-Pressure Studies of Some Heavy Fermion Materials
… as unconventional superconductivity, quantum critical points and quantum oscillations, and I explain why heavy fermion materials under pressure are good systems for studying these effects. Chapter 2 describes the experimental techniques used in my measurements. I give an overview of anvil …
-
High-pressure states of bismuth
… and the high value of the low-temperature upper critical field) may be evidence for strong electron-phonon coupling. This strong coupling is consistent with theoretical predictions which suggest the presence of a low-energy phonon mode arising due to the vanishing energy cost of moving …
-
Superconductivity in the proximity of a quantum critical point
… where physical pressure or a transverse field may be used to tune the magnetic transition towards T = 0 K. Our investigations, however, did not reveal the presence of superconductivity. It is likely that the field tuned transition does not correspond to a true critical point, whilst the …
-
The superconducting properties, composition and microstructure of nanocrystalline $A15\ \textnormal{Nb}_{3}(\textnormal{Al}_{1-x}\textnormal{Ge}_{x})$ superconductors for high magnetic field applications
… resistivity and SQUID measurements in magnetic fields up to 9 T to measure the critical temperature and the upper critical field. X-ray diffraction and scanning electron microscopy coupled with energy dispersive X-ray analysis were used to investigate the constituent phases, the distribution of …