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  Tunable damping in the Heusler compound Co2-xIrxMnSi

Köhler, A., Wollmann, L., Ebke, D., Chadov, S., Kaiser, C., Diao, Z., et al. (2016). Tunable damping in the Heusler compound Co2-xIrxMnSi. Physical Review B, 93(9): 094410, pp. 1-8. doi:10.1103/PhysRevB.93.094410.

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Köhler, Albrecht1, Autor           
Wollmann, L.1, Autor           
Ebke, Daniel2, Autor           
Chadov, Stanislav3, Autor           
Kaiser, Christian4, Autor
Diao, Zhitao4, Autor
Zheng, Yuankai4, Autor
Leng, Qunwen4, Autor
Felser, Claudia5, Autor           
Affiliations:
1Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
2Daniel Ebke, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863430              
3Stanislav Chadov, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863440              
4External Organizations, ou_persistent22              
5Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Zusammenfassung: Here we report on the realization of tuning the intrinsic damping in the half-metallic Heusler compound Co2MnSi by substituting Co by Ir. The work includes theoretical calculations and experimental measurements on bulk and thin films samples. Control of damping is to remove unwanted magnetization motion and suppress signal echoes through uncontrolled precession of the magnetization for future implementation of this material into, e.g., current perpendicular plane-giant-magnetoresistance sensors. Density functional calculations revealed stable magnetization and increasing damping parameter with Iridium concentration, whereas the half metallicity could be retained. The calculations are consistent with experimental results from bulk and thin film samples of this report and elucidate the linear dependence of the Gilbert damping parameter on the substituent concentration. This report again demonstrates the inherent tunability of Heusler compounds, which constitutes a pivotal feature of this material class.

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Sprache(n): eng - English
 Datum: 2016-03-092016-03-09
 Publikationsstatus: Erschienen
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 Identifikatoren: ISI: 000371729000003
DOI: 10.1103/PhysRevB.93.094410
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Titel: Physical Review B
  Kurztitel : Phys. Rev. B
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Woodbury, NY : American Physical Society
Seiten: - Band / Heft: 93 (9) Artikelnummer: 094410 Start- / Endseite: 1 - 8 Identifikator: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008