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Rotating Magnetization with Lattice Strain

Altering crystal structure of unique magnetic films manipulates magnetization orientation

  • Magnetic anisotropy defines the functionality in many
    applications including magnetic data storage, strong
    permanent magnets, and electrical transformers.
  • Sr2FeMoO6 (SFMO) and Sr2CrReO6 (SCRO) are unique
    magnetic materials whose strong anisotropy aligns with
    crystalline structure (“magneto‐crystalline anisotropy”)
    that arises from the heavy elements Mo and Re.
  • Researchers at The Ohio State University’s Center for
    Emergent Materials have shown that the magnetocrystalline
    anisotropy of SFMO can be manipulated
    (strain‐tuned) to change the direction anisotropy by
    varying the material on which the SFMO is grown
  • They have shown SCRO to have an extraordinarily large
    magneto‐crystalline anisotropy—much larger than any
    other magnetic materials known to date—also by
    manipulating the substrate on which the SCRO is grown.
  • The discovery of these new characteristics in SFMO and
    SCRO provides a platform for investigating the
    underlying magnetic interactions in magnet oxides and
    offers the opportunity for new applications.

Changing the material on which SFMO is grown rotates the magnetocrystalline anisotropy