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 17 of 17 for “"SQUID magnetometer"”.
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Synthesis of New Molecule-Based Magnets using Bridging Organic Radicals
… in this study were characterized using a SQUID magnetometer, elemental analysis, and infrared spectroscopy. Although some combinations failed to yield magnetically ordered materials, others exhibited ordering temperatures in the range of 95 K – 260 K. The ordering temperatures and …
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Electromagnetic Modelling of Superconducting Sensor Designs
… Superconducting QUantum Interference Device (SQUID) magnetometers made of YBCO (YBa2Cu3O7-x) was considered. The inductances and effective areas were calculated using the software package 3D-MLSI. Resolution and reliability issues were first tested on simple superconducting systems, showing …
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Magnetic properties of lithographically patterned thin film magnetic elements for magnetic random access memory applications
… studied using magnetic force microscopy (MFM), SQUID magnetometer, alternating gradient magnetometer (AGM) and vibrating sample magnetometer (VSM). The measured results have been compared with the theoretical shape anisotropy theory to try finding a guideline for controlling magnetic properties …
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Synthesis and Characterization of Magnetic II-VI Nanoparticles
… a superconducting quantum interference device (SQUID) magnetometer.
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A search for a new phonon detector
… can be monitored by a pick-up coil coupled to a SQUID magnetometer. Time-of-flight measurements versus pressure and tuning magnetic field were made to test the detection technique and showed good agreement with the measurements of others for phonon velocity and scattering in 4He versus pressure, …
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Entwicklung magnetischer Mikrokalorimeter für die hochauflösende Spektroskopie des beta-Emitters 36Cl
… Temperatur- sensors durch ein sensitives DC-SQUID-Magnetometer nachgewiesen wer- den. Für den 36Cl-Detektorprototyp wurde zur Messung der Magnetisierung eine flache, mäanderförmige Spulengeometrie gewählt, deren Abmessun- gen für das spezielle Experiment optimiert wurden. Die dafür nötigen …
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Measurement and on-chip control of a niobium persistent current qubit
… directions which can be measured by a dc SQUID magnetometer. This work examines a persistent current qubit fabricated in niobium, using Lincoln Laboratory's DPARTS process. Measurements of the niobium qubit show a promisingly high subgap resistance, demonstrate discrete energy levels, and …
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Resonant readout of a superconducting persistent current qubit
… a change in the Josephson inductance of a SQUID magnetometer. By incorporating the SQUID inductor in a high-Q resonant circuit, we distinguished the flux states of the qubit as a shift in the resonant frequency at 300 mK. The nonlinearity due to the Josephson inductance has characteristic …
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The current-phase relation of graphene-based Josephson junctions
… by incorporating the junction into an rf SQUID geometry coupled to a dc SQUID magnetometer, a technique usually referred to as phase-sensitive SQUID interferometry, which allows for the direct measurement of the phase difference across the junction. While some of the predictions from …
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Two dimensional Langmuir-Blodgett magnets
… samples of 101 and 11 layers were detected by a SQUID magnetometer. With the magnetic field parallel to the film we deduced an equivalent volume susceptibility of 6.4x10<sup>-3</sup> at 4.2 K. The signals from the multilayers were paramagnetic in nature and no evidence for a transition was found. …
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The synthesis of a ferromagnetic polymer
… of the materials were determined using a SQUID magnetometer. A novel rhodium catalyst, Rh(NBD)(NH3)Cl, was prepared in order to obtain good yields of polymerisation. A wide range of substituted phenylacetylenes were first homopolymerised in order to assess the efficiency of the catalyst. …
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Brillouin scattering from single-crystal dysprosium and gadolinium films
… the magnetization of the Gd film determined by a SQUID magnetometer, the values of Dc(T) and P2(T) were extracted over limited temperature ranges. These values are shown to be consistent with bulk values from the literature."
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Growth, structure and magnetic properties of magnetron sputtered FePt thin films
… deposited in Ar discharges, was measured with SQUID magnetometer hysteresis loops. For non-granular films with (001) preferential orientation the coercivity decreased (0.6 T) together with an enhancement of the out-of- plane anisotropy. Nanoislands show a coercive field close to the values …
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Diluted Magnetic Semiconductor Cobalt and Europium Implanted ZnO Thin Film
… The superconducting quantum interface device (SQUID) magnetometer shows all as-prepared samples are ferromagnetic at room temperature. However, it is unclear whether such a phenomenon is an intrinsic property or caused by the Co metallic clusters. The X-ray magnetic circular dichroism (XMCD) …
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SYNTHESIS, SURFACE MODIFICATION, AND CHARACTERIZATION OF BIOCOMPATIBLE MULTIFUNCTIONAL NANOPARTICLES
… (EDX), superconducting quantum interface device (SQUID) magnetometer were exploited to study the structure and properties of the fluorescent-magnetic multifunctional MSNs. The interaction between the multifunctional silica based NPs and cells were studied in vitro by using the LCSM and flow …
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Spintronics Physics of Thin-film Interfaces
… of $\sim$2.6 K in the $T_{C}$ is measured by the SQUID which is attributed to the lattice mismatch between the EuO(001) and the LaAlO$_3$(001) substrate. However, contradictory results were obtained by the PNR for the LaO$^+$-terminated sample, where a magnetic moment of 3.59 $\mu_{B}$Eu atom, …
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Nanostructured magnetic materials for integrated magnonic devices
This PhD thesis explores the fabrication, characterization, and application of advanced exchange spring (ES)/exchange coupled (EC) nanoheterostructures and their magnetic properties. Current challenges in the field of magnetics include the development of materials that demonstrate tunable magnetic …