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 19 of 19 for “"paramagnetism"”.
-
Measurement of the Spin Paramagnetism of Conduction Electrons
Made available in DSpace on 2015-05-12T17:12:00Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0015263.PDF: 3527084 bytes, checksum: 14c75419a765176bcd153ce4d0ed98b0 (MD5) Previous issue date: 1955
-
Tissue oxymetry using magnetic resonance spectroscopy
… practical clinical use. Our method is to use the paramagnetism of molecular oxygen to build a method for noninvasive tissue oxymetry. By using paramagnetism of molecular oxygen, magnetic resonance spectroscopy (MRS) can be used to measure tissue oxygenation. Chemical shifts of brain metabolites …
-
The magnetic properties of chromium-vandium alloys
… measurements supported the use of Pauli type paramagnetism for this set of alloys.
-
Solution Properties of Some Iron and Copper Macrocycles.
… In DMSO, FePc is diamagnetic. However, a paramagnetism plausibly explained by a d5 high-spin radical occurs with heating in the presence of methylene chloride.The macrocycle compounds studied were copper complexes of 1,A,7,10-tetraazadecane, 1,5,8,12-tetraazadodecane, and …
-
Penetration Depth Studies of Unconventional Superconductors
… by the presence of another order, such as paramagnetism/antiferromagnetism (in ErNi2B2C) or spin-density-wave (in Pb). We also see how the superfluid response is modified by nonlocal corrections in CeCoIn5 and Sr2RuO4. Hints of multi-band superconductivity are seen in YNi2B2C, LuNi2B2C and …
-
SANS investigations of the flux line lattice in unconventional superconductors
… unconventional superconductivity with strong paramagnetism. With H || c, these properties contribute towards both a rich FLL structure phase diagram, and new behaviour of the FLL form factor. Most notably, we observe the form factor to increase with field, in strong contrast to the monotonic …
-
Vortex distributions and dynamics in superconductors near surface steps and sample edges studied by scanning SQUID microscopy and critical current measurements
… new experiments to investigate the possible paramagnetism around surface trenches and we discuss future work to study the edge barrier mechanism further.
-
Magnetic properties of some niobium (IV) and tantalum (IV) complexes of distorted octahedral symmetry.
The treatment of paramagnetism using the approach of the crystal field theory is discussed, with special emphasis on the tetragonally distorted octahedral field. For the limiting cases when Delta >> lambda for positive and negative Delta, expressions for the susceptibility are derived. Complexes of …
-
Ultracold Fermi gas with repulsive interactions
… of density profiles in equilibrium. First, Pauli paramagnetism is observed in trapped atomic samples which have an inhomogeneous density due to the harmonic confinement potential. We experimentally measure the susceptibility of ideal Fermi gas. This research shows that ultracold atoms can serve as …
-
57Fe Mössbauer spectroscopic study of the spin-glass transitions in the mixed spinel series Mg0.9+xFe2(1-x)Ni0.1Ti0.1O4
… composition with x=0.7 a direct transition from paramagnetism to spin glass occurs on cooling, whereas for the compositions with x=0.5 and 0.6 an intermediate ferrimagnetic phase is observed with a transversal spin relaxation on the octahedral sites. At lower temperatures these compositions …
-
Electrical and magnetic properties of organic semiconductors: Electrical conductivity and electron spin resonance studies of semiconducting, organic, charge transfer salts.
… terms of Heisenberg antiferromagnetism and Pauli paramagnetism. In Chapter V temperature dependent behaviour of electrical conductivity is discussed in terms of an exciton band model, the lattice structure of the salts and one-dimensional lattice consisting of defects giving rise to high and low …
-
Ferrofluid flow phenomena
… are well described by the Langevin theory of paramagnetism. A detailed discussion of the demagnetization factor within the ferrofluid sample is also included. Ferrofluid flow through circular tubing in a laminar regime is examined as a function of the applied magnetic field magnitude, …
-
Synthesis, physical properties and processing of multifunctional molecular materials
… [(BDH-TTP)6] [Fe(croc)3] ·CH2Cl2 (1), where paramagnetism is due to isolated Fe(III) metal ions with S = 5/2 ground state of the anionic [Fe(croc)3]3- complexes and conductivity originates from BDH-TTP organic donor in k-type packing, has been obtained. When applying a pressure higher than 7 …
-
$^{17}$O Solid-State NMR Spectroscopy of Functional Oxides for Energy Conversion
… promising SOFC cathode materials that exhibit paramagnetism on the A site (A = Sm, Pr). The final section details the characterization of oxide-ion motion in the fluorite-type phases Bi$_{1-x}$V$_{x}$O$_{1.5+x}$ and Bi$_{1-x}$P$_{x}$O$_{1.5+x}$ ($x$ = 0.087 and 0.148) developed as SOFC …
-
Fundamental research into gold nanocluster properties
… and Au133(tBBT)52 in different oxidation states. Paramagnetism up to two unpaired electrons is observed with both these nanoclusters through solution phase magnetic studies. Through this, electronic structure information has been obtained to elucidate the behavior of unique superatomic 1G and 1H …
-
Development of first principles paramagnetic NMR methodologies to probe the complex local structural properties of Li-ion battery materials
… performance of these materials. However, the paramagnetism makes the interpretation of the NMR data very challenging. This is primarily due to the interactions of the unpaired electrons with the NMR observed nucleus, and the interpretation of the NMR spectra often requires the aid of reliable …
-
Resistivity anomalies for ferromagnetic metals at Curie points
<p>We have investigated the resistivity anomalies of ferromagnetic metals at the Curie point using the itinerant model. The nature of these resistivity anomalies is related to phase transitions of second kind. Current theory describing these anomalies is based on the localized model of the magnetic …
-
Vibrating Sample Magnetometer Instrument Operation Manual
No abstract prepared.
-
Solid-State NMR of Metallic and Paramagnetic Systems
Solid-state nuclear magnetic resonance (ssNMR) is a powerful element-specific technique to study local atomic environments in many different classes of materials; however, ssNMRbased methodologies have primarily focussed on diamagnetic systems without any unpaired electrons. In paramagnetic or …