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 13 of 13 for “"Single molecule magnet"”.
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Dipolar Interactions, Long Range Order and Random Fields in a Single Molecule Magnet, Mn12-acetate
… I will present an experimental study of two single molecule magnets, Mn<sub>12</sub>-ac and Mn<sub>12</sub>-ac-MeOH. I will show that in both systems, the temperature dependence of the inverse susceptibility yields a positive intercept on the temperature axis (a positive Weiss temperature), …
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Effects of Electron-Vibron Coupling in Single-Molecule Magnet Transport Junctions Using a Hybrid Density Functional Theory and Model Hamiltonian Approach
… shown that junctions consisting of individual single-molecule magnets (SMMs) bridged between two electrodes can be fabricated in three-terminal devices, and that the characteristic magnetic anisotropy of the SMMs can be affected by electrons tunneling through the molecule. Vibrational modes of …
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Exploring the pressure- and magnetic-field-induced phases of orbital-ordering KCuF3 and single molecule magnet Mn12-acetate: Crystal growth and Raman scattering studies
… of the orbital ordering material KCuF3 and the single molecule magnet Mn12-acetate as functions of temperature, applied pressure, and applied magnetic field. Single crystal samples of KCuF3, Mn12-acetate, 1T-TiSe2, and Bi2Se3 are also grown as part of this thesis work. Our experiments on KCuF3 …
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Lanthanide-based single-molecule magnets: A rational design by chemical intuition
… like aromaticity on the observation of single-molecule magnet (SMM) behaviour in a lanthanide-based complex (Dy1). Experimental techniques were combined with theoretical tools to investigate the dynamics of magnetic properties of the Dy1 and compared with the theoretical results for Dy2 …
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New routes to single molecule magnets
Structural and magnetic studies of citrate coordination clusters are presented for reaction systems involving cobalt(II), copper(II) and nickel(II). The cobalt(II) compounds incorporate cubane structural motifs that are of particular interest for the generation of single molecule magnet (SMM) …
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Molecular Magnetism: The Design, Synthesis, and Characterization of New Building Blocks for Molecule-based Magnetic Materials
… explored working towards the preparation of new molecule-based magnetic materials. In the first project, the amine functionality of 3,3'-diamino-2,2'- bipyridine was exploited for the preparation of a new family of ligands (H2L 1)-(H2L 4). The molecular structures of three ligands have been fully …
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Polynuclear 3d/4f-Metal Complexes as Molecular Magnetic Refrigerants and Single-Molecule Magnets
… complexes were found to exhibit interesting magnetic properties, specifically single-molecule magnetism and the magnetocaloric effect. In this thesis, Chapter 1 lays the foundation for the research presented within. This section covers the fundamentals of polynuclear metal complexes, …
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Electron Transport via Single Molecule Magnets with Magnetic Anisotropy
Single molecule magnets (SMMs) are molecules of mesoscopic scale which exhibit quantum properties such as quantum tunneling of magnetization, quantum interference, spin filtering effects, strong spin-phonon coupling and strong hyperfine Stark effects. These effects allow applications of SMMs to …
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Investigating the Cluster Chemistry of α-Methyl-2-pyridine methanol (mpmH) with Select 3d Ions
… for the discovery of polynuclear clusters with single molecule magnet (SMM) properties. Chapter 1 introduces the theory of molecular magnetism, SMMs and the concepts of chiral SMMs, magnetochiral dichroism and multiferroics. In Chapter 2, two NiII clusters, {Ni8} and {Ni18} prepared from …
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Synthesis, physical properties and processing of multifunctional molecular materials
… materials (MMMs) where conductivity and magnetism coexist or, in some cases, interact, have been prepared and fully characterized as quality crystals or thin films. [(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 …
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Tetrazines and N-Rich Organic Compounds Throughout the Fields of Materials Chemistry
… such as luminescence, conductivity, or magnetism (or any combination thereof), to enhancing the efficiency of catalytical materials, to working closely with engineers in an effort to create novel devices, the number of avenues through which one may explore the field is practically …
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Ligand Design for Dual Property Single Molecule Magnets
… clusters with interesting structural, magnetic and optical properties. Firstly, exploiting p-tert-butylcalix[4]arene (TBC4) macrocycles together with selected Ln(III) ions for the assembly of emissive single molecule magnets, and secondly the preparation and coordination of a chiral …
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Magnetic Characterisation of Nanostructured Magnetic Systems Using SQUID Magnetometry
In this thesis SQUID magnetometry was employed as the main characterisation tool to investigate the magnetic behaviour of a number of materials on the bulk, nano- and atomic scale. In particular magnetic characterization was conducted on a selection of doped lanthanum manganate (LMO)magnetic …