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  A New Highly Anisotropic Rh-Based Heusler Compound for Magnetic Recording

He, Y., Fecher, G. H., Fu, C., Pan, Y., Manna, K., Kroder, J., et al. (2020). A New Highly Anisotropic Rh-Based Heusler Compound for Magnetic Recording. Advanced Materials, 32(45): 2004331, pp. 1-8. doi:10.1002/adma.202004331.

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He, Yangkun1, Autor           
Fecher, Gerhard H.2, Autor           
Fu, Chenguang1, Autor           
Pan, Yu1, Autor           
Manna, Kaustuv1, Autor           
Kroder, Johannes1, Autor           
Jha, Ajay3, Autor
Wang, Xiao4, Autor           
Hu, Zhiwei5, Autor           
Agrestini, Stefano3, Autor
Herrero-Martín, Javier3, Autor
Valvidares, Manuel3, Autor
Skourski, Yurii3, Autor
Schnelle, Walter6, Autor           
Stamenov, Plamen3, Autor
Borrmann, Horst7, Autor           
Tjeng, Liu Hao8, Autor           
Schaefer, Rudolf3, Autor
Parkin, Stuart S. P.3, Autor
Coey, John Michael D.3, Autor
Felser, Claudia9, Autor            mehr..
Affiliations:
1Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
2Gerhard Fecher, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863431              
3External Organizations, ou_persistent22              
4Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
5Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863461              
6Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863441              
7Horst Borrmann, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863410              
8Liu Hao Tjeng, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863452              
9Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Zusammenfassung: The development of high-density magnetic recording media is limited by superparamagnetism in very small ferromagnetic crystals. Hard magnetic materials with strong perpendicular anisotropy offer stability and high recording density. To overcome the difficulty of writing media with a large coercivity, heat-assisted magnetic recording was developed, rapidly heating the media to the Curie temperature Tc before writing, followed by rapid cooling. Requirements are a suitable Tc, coupled with anisotropic thermal conductivity and hard magnetic properties. Here, Rh2CoSb is introduced as a new hard magnet with potential for thin-film magnetic recording. A magnetocrystalline anisotropy of 3.6 MJ m−3 is combined with a saturation magnetization of μ0Ms = 0.52 T at 2 K (2.2 MJ m−3 and 0.44 T at room temperature). The magnetic hardness parameter of 3.7 at room temperature is the highest observed for any rare-earth-free hard magnet. The anisotropy is related to an unquenched orbital moment of 0.42 μB on Co, which is hybridized with neighboring Rh atoms with a large spin–orbit interaction. Moreover, the pronounced temperature dependence of the anisotropy that follows from its Tc of 450 K, together with a thermal conductivity of 20 W m−1 K−1, make Rh2CoSb a candidate for the development of heat-assisted writing with a recording density in excess of 10 Tb in.−2. © 2020 The Authors. Published by Wiley-VCH GmbH

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Sprache(n): eng - English
 Datum: 2020-10-152020-10-15
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: DOI: 10.1002/adma.202004331
 Art des Abschluß: -

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Titel: Advanced Materials
  Andere : Adv. Mater.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Weinheim : Wiley-VCH
Seiten: - Band / Heft: 32 (45) Artikelnummer: 2004331 Start- / Endseite: 1 - 8 Identifikator: ISSN: 0935-9648
CoNE: https://pure.mpg.de/cone/journals/resource/954925570855