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@PHDTHESIS{Niesert:15621,
      author       = {Niesert, Manfred},
      title        = {{A}b initio {C}alculations of {S}pin-{W}ave {E}xcitation
                      {S}pectra from {T}ime-{D}ependent {D}ensity-{F}unctional
                      {T}heory},
      volume       = {38},
      school       = {RWTH Aachen},
      type         = {Dr. (Univ.)},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {PreJuSER-15621},
      isbn         = {978-3-89336-786-3},
      series       = {Schriften des Forschungszentrums Jülich.
                      Schlüsseltechnologien / Key Technologies},
      pages        = {146 S.},
      year         = {2012},
      note         = {Record converted from VDB: 12.11.2012; RWTH Aachen, Diss.,
                      2011},
      abstract     = {Magnetism is an intriguing phenomenon. It has fascinated
                      people already in ancient times, when performers
                      demonstrated the invisible magnetostatic forces which enable
                      amber to attract lint and dust in an – at that time –
                      incomprehensible and miraculous way. Since then, the
                      exploration of magnetic effects has long been extended
                      beyond pure curiosity. Nowadays a lot of the fundamental
                      magnetic mechanisms are well understood, leading to a
                      manifold of applications that are part of our every-day life
                      in one way or another, ranging from effects on a macroscopic
                      scale, such as the compass or the generator, to omnipresent
                      applications of modern micro- and nanoelectronics most
                      notably in the area of computing and information technology.
                      The delightful journey into the magnetic realm has just
                      begun, and – sufficient fundamental knowledge provided –
                      stimulating developments are ahead of us!
                      $\textbf{Applications of magnetism}$ The most prominent
                      utilization on a microscopic scale is probably magnetic data
                      storage – including computer hard disk drives – which is
                      present in all aspects of information technology, ranging
                      from IT infrastructure to consumer devices. The astonishing
                      growth in electronics capabilities (e.g., computing power or
                      storage capacity), which is commonly dubbed synonymously
                      with Moore’s Law, would not have been possible without
                      continuous improvement in the underlying basic technology,
                      and extension of the understanding and application of
                      magnetism on a microscopic level. A key achievement in this
                      regard was the discovery of the effect of Giant
                      Magnetoresistance (GMR), which is based on the orientation
                      of magnetic moments in an assembly of different magnetic and
                      non-magnetic slim layers of a thickness of only a few atoms.
                      It is this effect which boosted the development and enabled
                      the tremendous growth of hard disk capacity of the last
                      decade. Further applications include new magnetic sensors.
                      The outstanding relevance of this development is reflected
                      by the joint awarding of the Nobel Prize of Physics in 2007
                      to the discoverers of this effect, Peter Gr¨unberg and
                      Albert Fert. Magnetic data storage is now a key technology
                      of the information age and will continue to be so for the
                      foreseeable future. In order to fuel the development of ever
                      miniaturized areas in magnetic storage and ever decreasing
                      switching times of devices a deepened understanding of the
                      magnetic properties of the materials in use, in particular
                      its magnetic excitations and switching dynamics is
                      indispensable. $\textbf{Theoretical and experimental
                      investigations}$ While macroscopic properties have been
                      understood quite early from a phenomenological point of
                      view, its microscopic origin has been unclear for a long
                      time. This has only been revealed after the development of
                      [...]},
      cin          = {PGI-1 / IAS-1},
      cid          = {I:(DE-Juel1)PGI-1-20110106 / I:(DE-Juel1)IAS-1-20090406},
      pnm          = {Grundlagen für zukünftige Informationstechnologien},
      pid          = {G:(DE-Juel1)FUEK412},
      typ          = {PUB:(DE-HGF)11 / PUB:(DE-HGF)3},
      url          = {https://juser.fz-juelich.de/record/15621},
}