Tailoring magnetic anisotropy by graphene-induced selective skyhook effect on 4f-metals

Area of Science:

• Materials Science
• Condensed Matter Physics
• Surface Science

Background:

• Precise control of magnetic properties in rare-earth metals is essential for advanced technologies.
• Understanding and manipulating 4f-metal magnetism drives innovation in magnetic applications.

Purpose of the Study:

• To demonstrate a novel method for tailoring magnetic properties of rare-earth metals.
• To investigate the effect of graphene adsorption on dysprosium-iridium surface alloys.

Main Methods:

• Fabrication of a two-dimensional dysprosium-iridium surface alloy.
• Adsorption of graphene onto the surface alloy.
• Theoretical and experimental analysis of magnetic property changes.

Main Results:

• Graphene adsorption induced a selective 'skyhook effect,' lifting dysprosium atoms from the alloy.
• This lifting resulted in giant magnetic anisotropy in dysprosium atoms.
• The geometrical structure manipulation was key to achieving tailored magnetic properties.

Conclusions:

• The study presents a proof-of-concept for modifying 4f-atom crystal fields and magnetic anisotropies.
• This approach offers a new pathway for designing advanced magnetic materials.
• The findings provide a clear understanding of the underlying mechanism for magnetic property manipulation.