Electrical characterization of manganite and titanate heterostructures PDF Download
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Author: Anja Herpers
Publisher: Forschungszentrum Jülich
ISBN: 3893369481
Category :
Languages : en
Pages : 183
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Book Description
Author: Anja Herpers
Publisher: Forschungszentrum Jülich
ISBN: 3893369481
Category :
Languages : en
Pages : 183
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Book Description
Author: Irina Kärkkänen
Publisher: Forschungszentrum Jülich
ISBN: 3893369716
Category :
Languages : en
Pages : 151
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Book Description
Author: Annemarie Köhl
Publisher: Forschungszentrum Jülich
ISBN: 3893369880
Category :
Languages : en
Pages : 181
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Book Description
Author: Dieter Weber
Publisher: Forschungszentrum Jülich
ISBN: 3893369503
Category :
Languages : en
Pages : 141
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Book Description
Ionic transport in nanostructures at high eld strength has recently gained attention, because novel types of computer memory with potentially superior properties rely on such phenomena. The applied voltages are only moderate, but they drop over the distance of a few nanometers and lead to extreme eld strengths in the MV/cm region. Such strong elds contributes signi cantly to the activation energy for ionic jump processes. This leads to an exponential increase of transport speed with voltage. Conventional high-temperature ionic conduction, in contrast, only relies on thermal activation for such jumps. In this thesis, the transport of minute amounts of oxygen through a thin dielectric layer sandwiched between two thin conducting oxide electrodes was detected semiquantitatively by measuring the conductance change of the electrodes after applying a current through the dielectric layer. The relative conductance change G=G as a function of current I and duration t follows over several orders of magnitude a simple, empirical law of the form G=G = CIAtB with t parameters C, A and B; A;B 2 [0; 1]. This empirical law can be linked to a predicted exponential increase of the transport speed with voltage at high eld strength. The behavior in the time domain can be explained with a spectrum of relaxation processes, similar to the relaxation of dielectrics. The in uence of temperature on the transport is strong, but still much lower than expected. This contradicts a commonly used law for high- eld ionic transport. The di erent oxide layers are epitaxial with thicknesses between 5 and 70 nm. First large-scale test samples were fabricated using shadow masks. The general behavior of such devices was studied extensively. In an attempt to achieve quantitative results with defect-free, miniaturized devices, a lithographic manufacturing process that uses repeated steps of epitaxial deposition and structuring of the layers was developed. It employs newly developed and optimized wet chemical etching processes for the conducting electrodes. First high-quality devices could be manufactured with this process and con rmed that such devices su er less from parasitic e ects. The lithographically structured samples were made from di erent materials. The results from the rst test samples and the lithographically structured samples are therefore not directly comparable. They do exhibit however in principle the same behavior. Further investigation of such lithographically structured samples appears promising
Author: Lianfeng Fu
Publisher:
ISBN:
Category :
Languages : en
Pages : 382
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Book Description
Author: Miguel Alguero
Publisher: John Wiley & Sons
ISBN: 1118935675
Category : Technology & Engineering
Languages : en
Pages : 984
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Book Description
This two volume set reviews the key issues in processing and characterization of nanoscale ferroelectrics and multiferroics, and provides a comprehensive description of their properties, with an emphasis in differentiating size effects of extrinsic ones like boundary or interface effects. Recently described nanoscale novel phenomena are also addressed. Organized into three parts it addresses key issues in processing (nanostructuring), characterization (of the nanostructured materials) and nanoscale effects. Taking full advantage of the synergies between nanoscale ferroelectrics and multiferroics, the text covers materials nanostructured at all levels, from ceramic technologies like ferroelectric nanopowders, bulk nanostructured ceramics and thick films, and magnetoelectric nanocomposites, to thin films, either polycrystalline layer heterostructures or epitaxial systems, and to nanoscale free standing objects with specific geometries, such as nanowires and tubes at different levels of development. This set is developed from the high level European scientific knowledge platform built within the COST (European Cooperation in Science and Technology) Action on Single and multiphase ferroics and multiferroics with restricted geometries (SIMUFER, ref. MP0904). Chapter contributors have been carefully selected, and have all made major contributions to knowledge of the respective topics, and overall, they are among most respected scientists in the field.
Author: Boris Ildusovich Kharisov
Publisher: CRC Press
ISBN: 1466580895
Category : Science
Languages : en
Pages : 1203
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Book Description
The CRC Concise Encyclopedia of Nanotechnology sets the standard against which all other references of this nature are measured. As such, it is a major resource for both skilled professionals and novices to nanotechnology.The book examines the design, application, and utilization of devices, techniques, and technologies critical to research at the
Author: Advanced Photon Source (Research facility)
Publisher:
ISBN:
Category : Science and state
Languages : en
Pages : 152
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Book Description
Author: Peter Rodgers
Publisher: World Scientific
ISBN: 9814466867
Category : Technology & Engineering
Languages : en
Pages : 367
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Book Description
This book contains 35 review articles on nanoscience and nanotechnology that were first published in Nature Nanotechnology, Nature Materials and a number of other Nature journals. The articles are all written by leading authorities in their field and cover a wide range of areas in nanoscience and technology, from basic research (such as single-molecule devices and new materials) through to applications (in, for example, nanomedicine and data storage).
Author: Ming Liu
Publisher: John Wiley & Sons
ISBN: 3527341773
Category : Science
Languages : en
Pages : 258
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Book Description
Written by well-known experts in the field, this first systematic overview of multiferroic heterostructures summarizes the latest developments, first presenting the fundamental mechanisms, including multiferroic materials synthesis, structures and mechanisms, before going on to look at device applications. The resulting text offers insight and understanding for scientists and students new to this area.
