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This book is devoted to the rapidly developing field of oxide
thin-films and heterostructures. Oxide materials combined with
atomic-scale precision in a heterostructure exhibit an abundance of
macroscopic physical properties involving the strong coupling
between the electronic, spin, and structural degrees of freedom,
and the interplay between magnetism, ferroelectricity, and
conductivity. Recent advances in thin-film deposition and
characterization techniques made possible the experimental
realization of such oxide heterostructures, promising novel
functionalities and device concepts. The book consists of chapters
on some of the key innovations in the field over recent years,
including strongly correlated oxide heterostructures,
magnetoelectric coupling and multiferroic materials, thermoelectric
phenomena, and two-dimensional electron gases at oxide interfaces.
The book covers the core principles, describes experimental
approaches to fabricate and characterize oxide heterostructures,
demonstrates new functional properties of these materials, and
provides an overview of novel applications.
With the developing progress of materials fabrication, it is
possible to produce materials with exciting electronic and magnetic
properties which may be candidates for future device applications.
One key class of these materials is the metallic magnetic oxide
systems. This book focuses on colossal magnetoresistance (CMR)
materials, including manganites and cobalites. Transport and
magnetic properties and their dependence on stress, growth
conditions, stoichiometry and elemental composition are explored
quite extensively. However, the large magnetic fields required to
obtain the CMR effect have been perceived as a technological
roadblock for commercialization of this phenomenon. This has
motivated research aimed both at reducing the intrinsic field
dependence as well as at developing novel device structures that
will reduce the required effective field. Technologically useful
devices will undoubtedly involve heterostructures. Since the
magnetic and transport properties are extremely stress-dependent,
CMR heterostructures will most likely involve other metallic or
insulating oxide materials. Materials of interest include
half-metallic ferromagnets, yttrium garnet materials and ferrites.
Technological evolution and revolution are both driven by the
discovery of new functionalities, new materials and the design of
yet smaller, faster, and more energy-efficient components. Progress
is being made at a breathtaking pace, stimulated by the rapidly
growing demand for more powerful and readily available information
technology. High-speed internet and data-streaming, home
automation, tablets and smartphones are now "necessities" for our
everyday lives. Consumer expectations for progressively more data
storage and exchange appear to be insatiable. Oxide electronics is
a promising and relatively new field that has the potential to
trigger major advances in information technology. Oxide interfaces
are particularly intriguing. Here, low local symmetry combined with
an increased susceptibility to external fields leads to unusual
physical properties distinct from those of the homogeneous bulk. In
this context, ferroic domain walls have attracted recent attention
as a completely new type of oxide interface. In addition to their
functional properties, such walls are spatially mobile and can be
created, moved, and erased on demand. This unique degree of
flexibility enables domain walls to take an active role in future
devices and hold a great potential as multifunctional 2D systems
for nanoelectronics. With domain walls as reconfigurable electronic
2D components, a new generation of adaptive nano-technology and
flexible circuitry becomes possible, that can be altered and
upgraded throughout the lifetime of the device. Thus, what started
out as fundamental research, at the limit of accessibility, is
finally maturing into a promising concept for next-generation
technology.
The aim of this book is to present in one volume some of the most significant developments that have taken place in the field of integrated ferroelectrics during the last decade of the twentieth century. The book begins with a comprehensive introduction to integrated ferroelectrics and follows with fifty-three papers selected by Carlos Paz de Araujo, Orlando Auciello, Ramamoorthy Ramesh, and George W. Taylor. These fifty-three papers were selected from more than one thousand papers published over the last eleven years in the proceedings of the International Symposia on Integrated Ferroelectrics (ISIF). These papers were chosen on the basis that they (a) give a broad view of the advances that have been made and (b) indicate the future direction of research and technological development. Readers who wish for a more in-depth treatment of the subject are encouraged to refer to volumes 1 to 27 of Integrated Ferroelectrics, the main publication vehicle for papers in this field.
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