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.
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Showing 1 to 12 of 12 for “"Blocking temperature"”.
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Fabrication of Core-Shell Nanoparticles
… enhanced the magnetic property by increasing the blocking temperature from 124 K to 235 K for nanoparticles with a copper shell. The formed gold shell (0.67 nm) enhanced the cobalt nanoparticle magnetic property by increasing the blocking temperature above room temperature. The magnetic moment in …
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Exchange bias of metallic ferro-, antiferromagnetic bilayers : effects of structure, dilution, anisotropy and temperature
… effect of structure, dilution, anisotropy and temperature on the exchange bias effect in metallic ferromagnetic/antiferromagnetic (FM/AFM) thin films. The exchange bias effect appears at the interface between a FM and an AFM when the FM/AFM bilayer is either deposited or cooled below the Néel …
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Self-Reversal of Remanent Magnetisation of Basalts - Origin, Mechanisms and Consequences
… is caused by two magnetic phases with different blocking temperatures which are magnetically coupled. The lower blocking temperature corresponds to the primary titanomagnetite (mother phase) crystallising from the basaltic magma. The remanence with higher blocking temperature is carried by …
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The Conglomerate Test As A Magnetic Means Of Placing A Temperature Minimum On The Diatremes At OKA Canada
… in an attempt to place constraints on their temperatures of emplacement. These eight outcrops were chosen because they appear to petrographically represent different facies of diatreme emplacement. The opaque minerals samples were petrographically analyzed using reflected light and chemically …
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Spin dependent transport in continuous and discontinuous CoFeB/MgO heterostructures
… obeyed different tunneling laws in different temperature regions. The enhanced g-TMR value observed at low temperature was attributed to higher order tunneling. The study also focused on the variations in g-TMR, electrical resistivity and microstructures by post deposition annealing. The …
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Synthesis and Characterization of Novel Nanoparticles for Use as Photocatalytic Probes and Radiotracers
… exhibited superparamagnetic properties (blocking temperature ~170 K) whether or not coated with gold. These particles have potential applications as drug delivery agents, magnetic imaging contrast agents, and magnetically separatable photocatalysts with unique surface properties. Another …
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Magnetic and Transport Properties of Oxide Thin Films
… indicate super paramagnetic behavior above the blocking temperature of 100 K, suggesting that it is possible that there are ferromagnetic particles in the Fe-doped films. It was found that a Sn0.98Cr0.02O2 film became ferromagnetic at room temperature after annealing in H2. We have calculated …
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Aerosolizable Drug-Loaded SPIONs for Treatment and Diagnosis of Pulmonary Tuberculosis
… indicated superparamagnetic behavior with a blocking temperature near 50 K. Freeze-drying with cryoprotectants produced inhalable dry powders with MMADs of 2–4 µm, suitable for alveolar delivery. Cytotoxicity assays in A549 and BEAS-2B cells confirmed biocompatibility over 72 hours. The …
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Magnetic and structural properties of thin films and nanoparticles studied by scattering methods
… with a typical diameter of 7nm. From the temperature dependence of the magnetic ($frac{1}{2}$ $frac{1}{2}$ $frac{1}{2}$) Bragg intensity we obtained that for the MnO nanoparticles the phase transition is continuous with a N'{e}el temperature $T_N$=122K. This is in contrast to bulk MnO, …
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Synthesis And Characterization Of Discrete Fexni2-Xp Nanoparticles; Assembly Of Phosphide Nanoparticles Into Porous Networks
… to form amorphous Fe-Ni-P particles, and high temperature conversion of Fe-Ni-P particles into crystalline ternary phosphide nanocrystals. Ternary FexNi2-xP nanocrystals crystalize in the hexagonal Fe2P-type structure and the morphology of the nanocrystals showed a distinct compositional …
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An investigation of a polymetamorphic terrain using <sup>40</sup>Ar-<sup>39</sup>Ar geochronology
… Mid-Proterozoic. Because of the relatively low blocking temperature of the 40Ar- 39Ar geochronological system in mica (c.300-350 °C), it is readily reset by regional metamorphic events and previous K-Ar and 4OAr_38 Atgeochronology had found that the Early Proterozoic event dominated the ages …
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Lanthanide-based single-molecule magnets: A rational design by chemical intuition
… magnet with and without applied dc field and a blocking temperature of about 8 K. The obtained results showed that despite f−electrons having weak interactions with ligand field, it is possible to tune the magnetic properties of lanthanide-based complexes using ring currents, control of …