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