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      Ultrafast Magnetism of a Ferrimagnet across the Spin-Flop Transition in High Magnetic Fields

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          Most cited references19

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          Ultrafast Spin Dynamics in Ferromagnetic Nickel

          Physical Review Letters, 76(22), 4250-4253
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            Magnetism and Magnetic Materials

            J. Coey (2010)
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              Is Open Access

              The building blocks of magnonics

              Novel material properties can be realized by designing waves' dispersion relations in artificial crystals. The crystal's structural length scales may range from nano- (light) up to centimeters (sound waves). Because of their emergent properties these materials are called metamaterials. Different to photonics, where the dielectric constant dominantly determines the index of refraction, in a ferromagnet the spin-wave index of refraction can be dramatically changed already by the magnetization direction. This allows a different flexibility in realizing dynamic wave guides or spin-wave switches. The present review will give an introduction into the novel functionalities of spin-wave devices, concepts for spin-wave based computing and magnonic crystals. The parameters of the magnetic metamaterials are adjusted to the spin-wave k-vector such that the magnonic band structure is designed. However, already the elementary building block of an antidot lattice, the singular hole, owns a strongly varying internal potential determined by its magnetic dipole field and a localization of spin-wave modes. Photo-magnonics reveal a way to investigate the control over the interplay between localization and delocalization of the spin-wave modes using femtosecond lasers, which is a major focus of this review. We will discuss the crucial parameters to realize free Bloch states and how, by contrast, a controlled localization might allow to gradually turn on and manipulate spin-wave interactions in spin-wave based devices in the future.
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                Author and article information

                Journal
                PRLTAO
                Physical Review Letters
                Phys. Rev. Lett.
                American Physical Society (APS)
                0031-9007
                1079-7114
                March 2017
                March 14 2017
                : 118
                : 11
                Article
                10.1103/PhysRevLett.118.117203
                b5277999-a178-45b2-9a0f-8d195a175a74
                © 2017

                http://link.aps.org/licenses/aps-default-license

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