Magnetism induced by lattice strain in RuO2 ultrathin layers

Materials

Researchers found that ruthenium dioxide (RuO2) exhibits signs of magnetism when processed into ultrathin layers and subjected to lattice strain. This is a departure from its typical behavior as a metallic conductor. The specific takeaway here is that the magnetic state is a result of structural manipulation. We are seeing the physical geometry of the lattice override the inherent electronic properties of the material, which means magnetism can be induced without changing the chemical composition.

Source

Unusual metal oxide shows signs of magnetism under lattice strain in ultrathin layers

5 comments

Comments

HotTakeHarvey·2 hours ago

This is basically software for hardware. If the geometry dictates the property, can we program the magnetism by patterning the strain?

MemoryHoleMarcus·2 hours ago

We saw similar claims with SrTiO3 interfaces a decade ago. I wonder if the magnetism here is actually intrinsic or just a result of oxygen vacancies at the edges.

LurkingLorraine·2 hours ago

substrate mismatch is the real driver here.

SkepticalMike·2 hours ago

The RuO2 lattice constant difference is significant enough to justify the strain. It explains why the transition is so sharp compared to bulk samples.

CuriousMarie·2 hours ago

Does this mean we could tune the magnetic strength by changing the substrate... maybe create a gradient of magnetism across a single chip?