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Article Dans Une Revue Science Année : 2020

Metal-organic magnets with large coercivity and ordering temperatures up to 242°C

Iurii Dovgaliuk
  • Fonction : Auteur
  • PersonId : 1229012
  • IdHAL : 777430
Mathieu Rouzières
Philippe Négrier
Denise Mondieig
Sébastien Bonhommeau
  • Fonction : Auteur
  • PersonId : 972326

Résumé

Magnets derived from inorganic materials (e.g., oxides, rare-earth–based, and intermetallic compounds) are key components of modern technological applications. Despite considerable success in a broad range of applications, these inorganic magnets suffer several drawbacks, including energetically expensive fabrication, limited availability of certain constituent elements, high density, and poor scope for chemical tunability. A promising design strategy for next-generation magnets relies on the versatile coordination chemistry of abundant metal ions and inexpensive organic ligands. Following this approach, we report the general, simple, and efficient synthesis of lightweight, molecule-based magnets by postsynthetic reduction of preassembled coordination networks that incorporate chromium metal ions and pyrazine building blocks. The resulting metal-organic ferrimagnets feature critical temperatures up to 242°C and a 7500-oersted room-temperature coercivity.

Domaines

Matériaux
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Dates et versions

hal-02992922 , version 1 (09-11-2020)

Identifiants

Citer

Panagiota Perlepe, Itziar Oyarzabal, Aaron Mailman, Morgane Yquel, Mikhail Platunov, et al.. Metal-organic magnets with large coercivity and ordering temperatures up to 242°C. Science, 2020, 370 (6516), pp.587-592. ⟨10.1126/science.abb3861⟩. ⟨hal-02992922⟩
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